Cold Affected Exterior Items
|
The table below lists a
collection of items that are affected by cold
freezing weather. Consideration should be given
to each one to ensure that things will run
smoothly throughout your winter season.
Depending on your bus and installed equipment
some items might not apply. In that same vein, a
specific bus might need some attention paid to
areas not listed. Be thorough, careful and
complete. It's best to have a good working
knowledge of your equipment, options and
situation. Know too the affects cold weather
will have on all of them. What's presented below
will give you a general idea of the candidate
winter problem areas. I'll go through each item
listed below in reasonble detail below this
table.
|
Water Connection(s) |
Fresh water freezes at 32F. Exposed
hoses, valves, pipes and connections need to be
heated. Freeze ups cause damage and prevent water
flow. Leaks can create ice skating rinks under
your bus. |
Water Softener |
If you have one, it needs to be heated to avoid
freezing. |
Electrical Connection |
Protect service entrance cable from snow and
ice. Metal blade shovels can cut into the cable's
sheath. During shoveling, cables buried in snow
are hard to see and find. |
Waste Connection |
Sewage is mostly water. Your sewer hose will
freeze preventing proper tank drainage. This hose
doesn't need heating if it's drained completely.
Snow shovels can easily punch a hole in this hose. |
Slide Bottoms |
Slide floors aren't insulated. Insulating the
bottom will help prevent that "slab of ice
feeling" on your feet. It also helps save on
heating dollars. |
Hydro-Hot Intake Port |
If you have a Hydro-Hot unit, make sure its
intake doesn't become snowed in. Other problems
loom as well. |
Topper Awnings |
These take a beating from snow and ice. Proper
care and maintenance can avoid most headaches in
the dead of winter. |
Caulk Beads |
It usually starts with a few drips of water that
go unnoticed. Most buses have hundreds of feet of
caulked joints. Make sure they are all water
tight. |
Refrigerator Vent (Lower) |
Vents mean a place for cold air to enter. In
winter, cold air can freeze the ice maker's water
lines and control valve body. Freeze ups mean
possible cracks, leaks and damage. In severe
weather gas absorption units might not work
properly causing possible damage to the
refrigeration components. |
Windows |
Windows can collect snow which melts in the sun.
The melt water runs into cracks and joints causing
a bursting effect when it freezes at night. These
leaks are hard to find. |
Cracks & Leaks On Roof |
Any cracks can allow water to enter. Water then
freezes and expands the cracks allowing more water
to enter. Even the smallest crack can become a
problem during an extended winter stay. |
Diesel Fuel |
Diesel fuel will gel in very cold weather making
it difficult to pump. Make sure you use an
additive or the local winter blend. Too much air
space in the tank can lead to condensation, frost
and water. Keep tank as full as possible. |
AC Generator |
Make sure it starts and runs in cold weather.
The genset will be your backup when utility power
goes down. Being without AC power for more than an
hour in cold weather can create problems.
Especially if you are supplementing your heat with
electricity. |
Battery Banks |
They will freeze if not fully charged. Make sure
your charging system is in good working order.
Having an external battery charger as a backup
isn't a bad idea. |
Emergency Power Cord |
If utility power goes down your external
plumbing heat will need to be powered from your
genset. Install a circuit for this just in case.
In really cold weather freeze ups can occur in an
hour or less. |
Service Entrance Ports |
Stuff these with glass insulation to plug air
gaps. This keeps out cold, snow and vermin. |
Engine & Transmission |
Start your engine and allow it to warm up once
per month. Cycle transmission to allow fluid to
run through it. Get it hot enough to drive off
moisture. |
Leveling The Bus |
Water that collects on the slide tops will
follow a path down hill. Check your HWH level
sensing board if your bus is so equipped. |
Entrance Door |
Moisture can collect inside the entrance door
and freeze the locking mechanism. |
Water Lines |
Inside water lines that run close to an outside
wall may freeze. Do you know where they are? |
Water
Connection(s)
|
Water
Stand Pipe With Heater Installed
|
Most people will require four
utilities, three of which are usually made available
where you are held up for the winter. Utility
connections include water, waste and electricity. These
days I refer to the internet as the fourth utility and
it isn't covered here. Winter stay parks, resorts and
campgrounds will make their water service available
through a special heated stand pipe (see photo at
right). When the valve on this stand pipe is closed,
water drains down below the frost line. Make sure not to
unplug the heater when drawing water. Make sure you deal
with any extended power outages by closing the valve or
providing an alternate source of power to the heater.
You'll need to heat and insulate the water hose that
runs from this valve to your bus. One method is to use a
thermostatically controlled heat wire like the one Frost
King manufactures. Run this parallel to the hose and
cover both hose and heat wire with a length of pipe
insulation (Frost King makes that too). Use the softer
more flexible pipe insulation albeit more expensive.
Spiral wrapping of the heat wire isn't necessary. Make
sure the thermostat is exposed to the outside air. It's
helpful to include a Y connection on the valve so an
extra water source can be gotten without disturbing your
main water connection. Make sure all exposed piping and
fittings are heated and insulated from the cold. A
typical setup can be seen just to the left of the stand
pipe valve (see photo above). Some insulation has an
adhesive to close the slit. In really cold weather this
adhesive won't work. Some tapes won't work either. Try
to get your water connection(s) setup before the really
cold weather hits. Make sure nothing leaks and inspect
it often. Fix as required. Make sure the insulation is
tight and no plumbing is exposed to the cold. DO NOT
bunch or pinch heat wiring. Make sure that heat wires
don't touch themselves or touch any other heat sources.
Check, review and inspect your work making sure not to
cause any situation that might lead to over heating,
fire and a melt down. Your specific setup, choice of
products and any damages caused by poor judgement is
your responsibility. The setup shown here has worked
well down to -14F.
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Using
Plastic Trash Cans For Protection
|
I've installed GFI outlets on the
bus in both the driver side and passenger side storage
bays. If the service entrance box is up to code it too
will have a GFI outlet available. These provide ground
fault protected AC power for outside loads where water
might pose an electrical safety hazard. DO
NOT run any power outside around water without GFI
protection. In winter I plug an extension cord
(15A rating) into the driver side GFI outlet for
emergency power taken from the genset. This extension
cord runs neatly out of the storage bay with the main
service entrance cable. Some power outages have lasted
in excess of 5 hours. In really cold weather at night
things can begin to freeze within an hour. Plugging in
the heat wires to the emergency power outlet allows them
to run from the genset. Our refrigerator has an audible
"no power" alarm should power go out during sleeping
hours. You'll need to do a manual change over if your
heaters are plugged into the utility box. Having a
preinstalled extension cord makes that job easier. As a
last resort, you'll need to shut off the water service
valve and drain out your water connection(s). If power
goes out when the bus is unattended you're SOL as they
say. If you have a good battery bank and inverter, as we
do, you can keep the heat wires plugged into your
emergency power cord. The heat wires aren't more than a
few hundred watts and our inverter can run them off the
batteries for 3-4 hours. Keep in mind hooking things up
in this way means a reduction in the total amperage
available to your driver's side house outlet circuit. A
toaster or hair dryer load on that circuit might well
pop your 15A breaker. Also you can ruin flooded lead
acid batteries by discharging them too much. Most
inverters protect against this but make sure before you
proceed. When running extension cords keep them out of
water. If a connection gets water soaked it will pop the
GFI breaker causing a loss of power. Lost power means no
heat and no heat means freeze ups. And this can all
happen without you noticing, that is until the water
service freezes up and you lose water. If you freeze up
the stand pipe and bust it the park, resort or
campground might charge you for repairs. A water leak
can also cause an ice skating rink to form under your
bus. Be smart, safe and stay on top of things.
Water Softener - Optional
|
Improvising
A Water Softener Heater
|
As you move around, you'll find
water quality will vary significantly. For example,
Arizona had some of the worst water we've ever seen. In
a couple of months it destroyed a good quality garden
hose spray nozzle. A testimony to the damage caustic
minerals dissolved in the public water system can
inflict. On the other hand some states treat their water
to avoid this. Our stay in Colorado found us with
excellent water quality. Unless you purchase a hardness
kit to test the water you may not have any idea of the
damage index. Bad water can raise hell with brass
fittings, valve seats, faucet seals, nozzles, clothes
washer internals and the hot water heater to name a few.
If you have a Hydro-Hot system, bad water can plug the
heat exchanger which is a very costly repair. Our
solution was to use a portable water softener (see photo
at right) to remove the problem minerals. Perhaps using
a specialized filter would accomplish the same purpose
with less hassles. Pick what works best for you. If your
solution includes a volume of water exposed to the cold
you're going to need to keep it from freezing.
The water softener needs to go
between the water source and your bus. This means extra
hoses, fittings, heater, connections, effort and
expense. Follow the manufacturer's instructions on
hooking up the softener and servicing it. What isn't in
the instructions is how to keep the unit from freezing
in cold weather. The best approach would be to put it
inside your plumbing bay which stays above freezing.
This wasn't an option in our case because there isn't
enough room. Instead, I used a Frost King 60' single
heat wire. Keep in mind this wire is designed for roof
and gutter heating to avoid ice dams and not for what's
shown here. Proceed at your own risk when devising a
solution or implementing this one. It's important that
heat wires don't touch themselves. If that happens
excessive heating, damage and possible fire can occur.
You'll need to wind the wire in a near perfect helix
around the tank making sure space is left between each
loop. I used a good grade of film wrap to hold
everything in place. The goal is to avoid adjacent wires
from coming in contact with one another during the
installation and thereafter.
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Make Sure
To Heat Fittings & Valves
|
Make sure to leave some extra wire to
wrap the connections and control valve on top (see photo
at right). Do this in a way that you can service the
softener without damaging the heat wires. The Frost King
product used here doesn't have a thermostat. DO
NOT run this heating system without a thermostat
control as it will over heat. One option to
solving this problem is a line voltage thermostat like
the ones used to control baseboard electric heat in
houses. Keep in mind these are for
indoor use only so proceed at your own risk.
Put the thermostat in contact with the wires and set it
to 40-50F. Make sure all electrical connections are
tight, safe and secure. It's also very important to
leave a small air gap between the softener's heat wire
wrapping and all insulated water connections. You want
the heated softener to be standing in free air. DO
NOT insulate the water softener. Make sure to
place it under an upside down plastic garbage can for
protection against the elements. You want to keep the
thermostat out of rain, snow, ice and direct sunlight.
You also want to keep the assembly out of the wind. Use
a garbage can large enough in diameter to maintain an
air space around the unit. Allow extra length on hoses
so they comfortably exit out the bottom and aren't
stressed, strained or pulled. Use two small cement
blocks as a base to raise the unit up off the ground a
few inches and keep it out of standing water. With the
heater turned on, the softener's tank should be just
comfortably warm not hot. Monitor this often for proper
operation. Make sure all connections are tight and that
no heat wires are overlapping one another.
I've installed a Y connection on the
outlet side of the softener. I also keep a short length
of service hose connected. This comes in handy when
backflushing and purging salt taste from a freshly
recharged tank. In cold weather keeping routine tasks
efficient means less time spent outside in freezing
weather. How often you'll need to add salt depends on
how bad your local water supply is. The more minerals
the softener needs to remove the faster the salt charge
will run out. Using more water also means more frequent
salt replenishments. This system has worked down to -14F
but requires monitoring and careful implementation. As
of 11/2010 there is a product called the Thermo Cube
which is a thermostatically controlled outlet which
turns on at 35F and off at 45F. It's made by Thermo
Cube, Inc. of Plymouth, IN. This might make controlling
the heat wire an easier hookup. No experience or
information is available with using this product,
however.
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Shown
at left are the water and waste connections
running through access ports in the plumbing
bay. Note the use of both pipe and fiberglass
insulation to keep cold air out. A grommet is
made from pipe insulation covering the
perimeter of the hole. Then the space is
filled with fiberglass insulation (pink and
yellow) to make a tight seal. An optional drip
pad has been included at 10 o'clock on the
waste connection. Excess heat wire is shown
continuing along the water hose. Less the pipe
insulation, a spiral wrap keeps the heat wire
with the hose. By varying the helix spacing
you can easily adjust the path of the heat
wire along the water hose. Closing up access
ports is an easy, cheap and effective step in
keeping out the cold. It also helps keep out
destructive vermin looking for a winter
shelter. Mothballs can be sprinkled around to
further discourage an unwanted entrance by
small animals. They can be highly destructive
and difficult to remove.
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Electrical
Connection
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Protect
Service Entrance Cable With Pipe Insulation
|
The electrical service entrance
cable is relatively easy to setup for the winter. It
isn't susceptible to damage from freezing and thus
doesn't require heating. Even so the cable will get
buried in the snow and can get nicked or damaged by a
shovel blade or falling ice. Pipe insulation works well
here (see photo at right) to protect the service
entrance cable's sheath. If you hit into it with a metal
shovel blade chances are good no damage will be done.
Use the same insulation techniques described for water
and waste to close up holes in the electrical entrance
port. Orient the slit in the insulation down so water
drains.
Waste Connection
The waste connection drains both
your black and grey water tanks. Although the connection
on the bus side of the hose is standard, the other end
can be anything from a nice screw on connection to a
hole in the ground. The path from your bus to the site's
waste connection will vary according to grade and
distance. The ideal situation is to have the waste hose
run down hill toward the site's connection in a straight
decline. Connections on both ends should be tight and
reasonably durable. Some places that offer winter stays
will require a vinyl hose which is more durable. The
Rhino hose has worked well for us but is delicate. A
spare hose is kept just in case the active one craps
out. Falling ice, brittle cracks from cold weather and
shovel blades all represent potential hose failures.
It's easy to step on the hose when it's buried in snow.
Try to take into account all of the above when setting
up your waste connection for a winter's stay.
The waste hose doesn't require
heating. Never leave gate valves open except when
draining tanks. Make sure all water is "walked" out of
the hose when the draining task is completed. This is
especially true for those dealing with "uphill" sewer.
Any water left in the hose will quickly freeze. Walking
out water means carefully lifting the hose up at its
source to create artificial height toward the drainage
point. Water then flows toward the service connection
and out of the hose. Move along as required to force all
water to drain from the entire length of hose. This
usually requires about 3 passes. If the hose is setup
ideally, walking waste water out isn't required. Some
people fashion a support from a length of vinyl drain
gutter to accomplish a smooth steady decline. It's
impossible to get all the water out and that's fine.
Small amounts of water left in the hose will freeze in
the bottom only to be melted with the next drainage
cycle. If large full diameter water pockets are left
inside the hose they will freeze and block flow. Getting
a frozen hose thawed out in cold weather is no fun.
Don't move the hose around with frozen water in it
either as you can cause a leak this way. When picking up
or putting down the hose, make sure no sharp ice will
puncture it. Really cold weather will make plastics
brittle and more prone to cracks. Work quickly while the
hose is still warm from drain water. If you have to
reroute the hose run warm water through it first. If you
are careful managing a waste water connection in cold
weather it will work fine and won't leak.
This takes care of your water, waste
and electricity. Factor in common sense when creating
solutions and adapting products for use in areas they
aren't designed for. Until dedicated products come on
the market, solutions will need to be improvised. Above
all always make sure your setup is safe and won't
present any dangers to you or anyone else. Inspect
everything on a regular basis and after any significant
weather changes. Make adjustments, changes and repairs
immediately as required. As a community member it's your
responsibility to always maintain safety and avoid
accidents, injuries and property damage. I've always
said, "If you want maximum aggravation, just be lazy
now."
Slide
Bottoms
|
Using
Foamular On A Slide Bottom
|
Buses equipped with slideouts offer
occupants increased living space and many conveniences.
Those conveniences and added living space all come at
the cost of leaks, mechanical problems, increased heat
loss, plumbing problems, electrical issues and added
maintenance. Our bus has four slides and we've dealt
with all of the above first hand on multiple occasions.
In fact, we're still dealing with issues. For slideouts
that provide sitting areas such as a kitchen or work
table, the slide bottom (floor) must remain thin. This
allows for better blending with the main floor of the
bus and avoids abrupt edges as walking spaces transition
from slide to main floor. In this slide area it is
likely you'll find your feet planted on the floor while
sitting at one of the included tables. This thin floor
is exposed directly to outside temperatures and doesn't
have any insulation in it. In cold weather this creates
a "cold slab" within the living space which reduces
comfort. Especially if your feet are resting on it.
Using 2" Foamular insulation board
applied to the slide bottom (see photos at right) makes
a HUGE difference in heat loss. This board is available
in 4'x8' sheets at home centers and isn't expensive.
Many home centers will cut the board for you which is a
good idea. The saw chips are very messy, stick to
everything and are difficult to clean up. Cut panels can
be installed by press fit and sealed with a good quality
outdoor grade of tape. The
|
Foamular
Panels On Slide Bottom
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difference these panels make in reducing
heat loss is striking. They won't create a toasty warm
floor but will significantly reduce temperature
gradients. Most tape adhesives won't stick well if at
all in cold weather. Keep that in mind when chosing your
installation time. If possible, get this setup in warmer
weather before the really cold temperatures roll in.
These panels will prevent the slide from being retracted
which might present problems for some applications. It's
a good idea to post a reminder note on your slide
control that warns of removing insulation panels before
operating the slide. It's an easy thing to forget about
after a long winter stay. Evaluate the use of this
insulation board carefully before installation. It might
not be appropriate for your bus. Make sure to consider
water drainage, ice and snow to ensure these panels
won't be promoting damage of any kind. Again this is one
of those cut and tape solutions of a product never
intended to function as shown.
The Hydro-Hot System
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Hydro-Hot
Heating & Hot Water Unit
|
The Hydro-Hot unit is a 12 VDC
device that maintains about 4 gallons of a heat transfer
fluid at 190F using the German Webasto diesel burner
unit. The heat energy stored in the heat transfer fluid
reservoir is used to make continuous domestic hot water
and also provides hydronic heating zones. It's kind of
like a radiator in reverse. If your bus has been
outfitted with a Hydro-Hot heating unit you should be
aware of some possible issues with its operation in cold
weather, snow and ice.
If your bus has been rated for
freezing weather operation, some means of keeping the
plumbing from freezing must be present. Specific methods
for accomplishing this vary by manufacture. On Hydro-Hot
equipped vehicles, the plumbing, tanks and heating unit
usually occupy the same bay. The radiated heat from the
heating unit keeps one side of the plumbing bay above
freezing. A heat exchanger, run from the heating unit,
is installed on the other side of the plumbing bay to
furnish heat there. In theory this is supposed to keep
the plumbing bay above freezing. In really cold weather
(like -14F) a temperature gradient of 30F can develop
across the length of the plumbing bay. Cold spots might
also be present. If the hot side is at 70F the cold side
will be around 40F and so on. Usually a thermostat is
installed in the coldest area to kick on the heating
unit if temperatures fall below 38F. Make sure you
understand how the cold side of the plumbing bay is kept
warm. Verify that it is, indeed, doing its job. If
you're supplementing the hydronic heat with propane or
electric heat the Hydro-Hot system might not run enough
to keep the plumbing bay warm. If the cold side
thermostat isn't working things might freeze and you
know the rest. Our bus has sensors (not alarms) at both
ends of the plumbing bay to constantly monitor
temperature. You need to watch these. If the thermostat
is working in the plumbing bay there should be no issues
with freezing. It never hurts to keep an eye on these
things and check operation regularly. My experience with
RV products and designs has revealed them to be among
the worst you'll see. Trust nothing, watch everything
and double check systems.
|
Cheap Tank Level
Switch On Hydro-Hot Unit. It Broke And Shut Down
The Heat.
|
The Hydro-Hot includes a spray
nozzle and turbine style diesel burner very similar to
the oil heaters found in homes. Make sure the air intake
and exhaust don't get blocked up with snow, snow drifts
or ice. The burner has a light sensor in it to detect a
flame. If the ignition can't light the diesel spray for
some reason the unit will shut down. You'll need to
clear the fault and manually reset it. Our $8K unit also
included a cheap plastic tank level sensor (see photo at
right) that failed just after the warranty expired. When
this switch breaks your heat will shut down. Losing heat
when the cold side of the plumbing bay is at 38F means
it won't take long before things start to freeze.
Keeping fresh water in your tank will provide some
thermal inertia and help slow the cooling rate. Without
any heat, freezing temperatures will eventually invade
the plumbing bay with disastrous results. It's a good
idea to install a backup heat source in the plumbing bay
like a thermostatically controlled electric heater
w/fan. If you do this just make sure it doesn't pose a
safety or fire hazard. Getting a backup heating plan in
place before the break down occurs makes life easier.
And you know the break down will happen in the middle of
the night when it's freezing cold out. Remember that
Murphy was an optimist.
Topper
Awnings
|
Acrylic Fabric
Topper Awning Protects Slide Top
|
These are the acrylic or vinyl
panels that supposedly keep the weather off the top of
your slides. In doing so it's hoped that water stays out
of the interior of your bus. Designs and installations
of topper awnings vary by manufacturer with varying
levels of effectiveness and quality. Carefree of
Colorado is a popular brand and this is what is on our
bus. I can't say I'm impressed with the quality. Certain
nickel and dime cost cutting measures taken by the
factory have left us needing to make inconvenient
repairs. In other cases we've sustained unnecessary
water damage. All of it translates to aggravation.
Panels roll up on a spring loaded
drum much like a window shade. The drum is usually
mounted to the top outside horizontal edge of the slide.
A metal cover protects the drum and two outrigger
brackets provide support for the whole assembly. The
rolling drum allows the awning to be self storing when
the slides are retracted as the material rolls up on the
drum. Acrylic fabric is more durable than vinyl but its
porosity needs to be treated with special chemicals to
make it water tight. If the fabric leaks or bleeds, then
water drips onto the slide top and puddles along joints.
Wind can blow puddles through slide gaskets which
results in water getting into the interior. Since
there's a space between the topper awning and slide top
- snow can blow in, melt and create puddles that will
freeze at night. Fabric is soft and pliable so it's
prone to sagging which creates places for water to form
small pools. Using ribs and supports may help this
|
Weight Of Water
Causes Sags And Pools
|
situation but it's almost impossible to
avoid it completely. Raising the center will cause water
to flow back towards the bus. This results in dripping
water right at the slide entrance gasket. The best
approach is for the awning to be pitched away from the
bus in a severe enough angle to promote reliable
drainage. The tension of the awning needs to be tight
enough to avoid large sags under the weight of water,
snow and ice. Owing to conflicting design parameters,
getting everything optimal to include a tightly
stretched awning isn't usually possible so something
suffers. Once a sag begins it's somewhat of a vicious
cycle as water weight continues to stretch the fabric.
303 Products, Inc. makes a product
known as High Tech Fabric Guard which is a water
repellent. It's $25 a quart and marginally effective in
my opinion. This is basically a wax compound dissolved
in a petroleum distillate. The distillate acts as the
vehicle to conduct the wax into spaces within the fabric
thus creating a seal. It needs to be applied in hot
weather so the wax flows into the fabric properly and
completely. My experience with the product is it doesn't
really seal out water and what sealing it does doesn't
last long. As the treatment weakens, water soaks into
the fabric. The entrapped water freezes which opens up
porosity in the fabric thus creating space for more
water to soak in. During the daytime frozen water melts
and bleeds through causing puddles of water to form on
the slide top. In cold weather (40F) applying additional
fabric treatments isn't an easy task and in really cold
weather it just isn't possible. I've treated our acrylic
awnings with multiple coats and have been unable to get
them completely water proof. But High Tech markets their
product as a water repellent so they're sort of off the
hook. On a more vertical surface where water runs off I
think you'd be fine. But topper awnings are more
horizontal as shown by the photo above. Scotch Guard
might be a better option but the original formula isn't
available owing to environmental concerns. A water tight
rubberized UV resistant fabric might be the best choice
here. In the meantime, try to keep the fabric sealed as
best possible and remove water, snow and ice on a
regular basis. Monitor any water that is bleeding
through the topper awning and remove as required. Watch
where the puddles go and remove them before the drip,
drip, drip starts.
Carefree Of Colorado sells the small
replacement topper awning for $175. And that's just the
fabric. They don't seal it particularly well and the
thread they use for stitching the seams isn't UV
resistant. Thread rots out in a couple of seasons
allowing the fabric to pull out of its slot on the bus
side. Making repairs is a pain in the neck and I think
this penny pinching design strategy is in very poor
taste. It's known from the beginning that fabric and
stitching will be left out to the elements and I don't
think it's unreasonable to expect proper materials to be
used. Especially at those prices! This is just another
sneaky way of transferring the building/fabricating
costs to the eventual consumer.
|
Heavy Snow
Weighs Down A Topper Awning
|
Topper awnings take another beating
from the wind in the form of billowing. The unsupported
topper edges and air space between the fabric and slide
top allow wind pressure to build up. Billowing fabric
comes from wind pressure unrolling the small amount of
extra fabric remaining on the spring loaded drum. High
winds can tatter exposed edges and unroll the extra
fabric off the drum. When the wind gust ceases the drum
will abruptly retract the fabric with a bang. It's hard
on the fabric, drum, spring, beading, stitching, seams
and mounts. Wind storms can produce gusts over 70 MPH
that last for minutes or days. Repeated abuse from high
winds for protracted periods of time will certainly do
damage. Ripped fabric, shreaded stitching and broken
mounts are the most common forms of damage. If rain is
present with high winds water can violate the slide
gaskets of an unprotected slide top. It's a potential
mess and damage that's best avoided.
|
Tying A Topper
Awning Down With Rope
|
Three options exist that will help
protect topper awnings from wind damage. The first and
most obvious one is to retract your slide(s) on the
windy side of the bus. Make sure awnings and slide
surfaces are clean. If you've insulated your slide
bottoms the insulation boards will need to be removed.
Plan on losing some of your living space with this
approach. I rate this option as the least convenient of
the three. Number two requires that your topper awning
be loaded down with a heavy snow block (see photo
above). This usually will keep everything in place
during a wind storm. If your fabric seals out water well
this "do nothing" option might be the best choice. I try
to remove snow and ice from the roof and topper awnings
on a regular basis. That helps keep water out but also
leaves the fabric free to billow in high winds. Option
three is to use a tie down rope which works very well.
It's reasonably quick and easy to do. Nylon rope works
well but I'd imagine just about any rope will do the
trick. This approach only works if you have something to
tie the rope to. I use the slide rack mechanism
underneath for securing the rope ends. This has worked
in 70+ MPH winds and keeps the fabric from billowing,
slamming and banging. These are just some suggestions
that may or may not be appropriate for your situation.
If none of these translates into a solution perhaps they
will provide some ideas that are helpful. Some topper
awnings have been designed properly, made well and don't
suffer from any of the previously mentioned problems.
Some buses don't use topper awnings at all. That said,
it's best just to keep an eye on things to spot problems
early before damage occurs. This is especially true if
your winter stay includes freezing and thawing cycles
induced by hot sun and nightly temperature dips below
32F. Dripping, running and flowing water by day followed
by nightly freezing will burst caulk beads, backout
screws, loosen seals, bend metal and create holes.
Careful inspection to find these problem areas early in
the season is effort well spent.
Caulk
Beads
|
Rubberized Caulk
Sealing Slide Joints
|
Buses are just loaded with seams,
joints, screws, gaskets, flanges and mouldings all of
which present places for water to enter and do damage. A
variety of caulking compounds are used to seal these
areas up. Over time caulking can loosen and deteriorate
so it's a good idea to inspect these areas regularly.
The bursting effects of freezing water can damage caulk
beads. In many cases failed caulking leads to a drip,
drip, drip that you won't notice until carpeting gets
wet and moldy. You may notice a part of your wall is
soft. Perhaps you'll smell something funny. In our case
water ran in on one of the electronic lighting control
push button stations. Once the circuit board got soaked
the lights went nuts creating a flashing disco effect
throughout the bus. Corroded grounds are another water
related problem and particularly difficult to find.
Damage to interior wall spaces is also hard to detect.
By the time water damage shows its ugly head, expect
repairs to be difficult, serious and expensive. Like
cancer, early detection is your best defense against
serious problems. If you can anticipate the most likely
problem areas before water gets in you'll avoid
headaches. Slideouts are some of the first areas prone
to leaks. We've encountered a variety of these and are
still dealing with problems in this area. Slide designs
vary by manufacturer and none of them are completely
water tight. If there is a gasket, seal, bead or joint
left unattended it's going to leak. And slideouts are
loaded with these. You might say "slideout" is just
another name for water's welcome mat.
|
Weep Hole
Drilled In Bottom Of Slide Angle To Detect
Water. Tape Can Be Used To Close Hole.
|
Mouldings and flanges exist in many
places on the exterior of the body. Long runs of caulk
are used to seal out water. If cheap caulk was used it
certainly will fail leaving you to figure out where and
when. Improperly fitting parts slobbered with caulk to
hide poor quality workmanship are another area that
should be inspected closely. Repairing these areas means
removing the old caulk and applying new. DO NOT use
cheap caulking products or those under rated for the
sealing job. Industrial and marine products are usually
safe bets. Although the terms marine grade and
industrial strength may appear on the label chances are
a $3 tube of caulk purchased from Walmart is neither.
Buy caulk from industrial and professional sources. GE,
3M, Dow Corning, DAP and Sikaflex are usually good
products. Some companies make cheap home owner versions
of their industrial grade products. Expect to pay
between $8 and $15 or more for a 10 oz tube of good
quality caulk. Make sure the stuff is fresh and apply it
well above the minimum temperature stated by the
manufacturer. Petroleum based caulks like DAP 3.0
roofing sealer can be applied in colder temperature. For
spot repairs a hairdryer can be used to bring up the
temperature and decrease the set time. The chemistry of
sealants is very complex so do your research and make
sure the caulk is designed to adhere to the materials
it's being used on. U/V resistance is a requirement and
most outdoor rated products can handle prolonged
exposure to direct sunlight, heat, wind, freezing
temperatures and rain. But in today's market where label
deception seems all too common an occurrence, do your
homework.
Examples
Of Caulk Beads
|
|
|
Body
moulding is usually caulked at joints. Shown
in the photo above are 5 beads.
|
Slides are
a maze of caulked joints and gaskets. The
slightest gap or hole in the wrong place will
admit water.
|
|
|
Topper
awnings connect with beading inside a channel
slot. Many places exist for water to collect,
drip and run inside. Notice the 5 caulking
beads.
|
On some
designs lap joints face up and are almost
impossible to seal. A good grade of tape
really helps tighten these areas. Notice the
rust bleed from the screw head.
|
Each bus manufacturer has different
designs and those designs can vary with models as well.
The bus shown in this article is a 2006 Country Coach
430 Allure series. Owing to poor design and sloppy
workmanship we've had to deal with a myriad of problems
to include caulking related water leaks. Solutions to
the water leaking problems are generally easy to fix and
inexpensive providing you know about them in advance.
Once the water damage starts, repairs become difficult,
inconvenient and expensive so make sure to inspect
everything carefully to avoid costly remediation.
Caulking repairs are best done in warm dry weather when
working outside is easy and pleasant. If you are the
lucky owner of a "Friday Afternoon" bus, take extra care
to inspect it thoroughly for problems. Sadly little
correlation exists between price and quality. Caulking
beads can be tricky to find where the leaks are. This is
especially true if they haven't progressed to the
"visual evidence of water" stage. Small pin holes and
lifting of caulk away from the substrate usually can't
be seen. If you suspect problems just redo the joints to
be on the safe side.
Refrigerator Vent (Lower)
Many buses are equipped with a gas
absorption refrigerator which must vent to the outside.
Air flows into this vent (located on the outside wall
behind the refrigerator) then up over the cooling unit
and finally exits out a roof vent. Refrigerators with an
ice maker require a cold water feed, shut off valve,
control valve and water line that supplies the ice
maker's mold. If this is within the vented space behind
the refrigerator (and it usually is) it can freeze.
|
|
Water leaking from the
refrigerator compartment streams down the side of
this bus. It stopped after the entire water tank
was pumped out. The pump ran dry thereafter. |
Norcold didn't wrap the body of
the ice maker water control valve properly. An
angular vertical crack is seen on the bottom
section of the blue body just left of center. |
The pictures above show a failure on a
neighbor's bus. I caught this one on my way out and was
able to get in touch with the owner but not before all
the water in their tank was pumped out. This is a
Norcold 1200LRIM refrigerator and its controls are right
behind the cavity vent. Although Norcold does provide a
heated wire wrap it wasn't installed properly. The day
this happened it hit -10F at night which easily froze
the unheated portion of the valve body (blue plastic in
right photo above). This is a very common problem. You
can install a plug expander for plugging in a light bulb
to provide heat. I use a heating pad controlled by a
Thermocube.
Windows
Windows are another place for water
to collect, pool, freeze and burst. Most used in RV
applications are of extruded aluminum construction. The
outside bottom channels have weep holes with plastic
covers. Inspect these to make sure they are draining
properly. Depending on how you are parked, one side of
the bus may remain in the shade. This means no direct
sunlight so expect different behaviors from water, snow
and ice. Again the message is to keep an eye on your
windows both in day and night so as to observe the
complete freeze/melt cycle. Do so in both really cold
and milder weather. Also inspect after any significant
storms of rain, freezing rain and snow.
Cracks & Leaks On Roof
The roof isn't easy to see unless
you climb up on it. Thus it's an easy thing to forget
about. When snow and ice collect on the roof it isn't a
fun job climbing around up there. Inspection should be
done in warm weather prior to a winter season stay. Most
likely leaks will be found in the caulk beads. Soil
stacks, mouldings, cap joints, shower skylights,
antennas, air horns, satellite domes, wind sensors,
wiring, brackets and vent fans all have caulk and
represent a potential leak. Inspect all of these and
"touch up" the caulk as required. Removing snow and ice
is a good idea so to let the sun dry the roof off.
Diesel Fuel
Diesel fuel is used by the Hydro-Hot
system and diesel generator if you have these
accessories. Feeds are taken from the main fuel tank off
of a separate dip tube. This dip tube is raised off the
bottom of the tank to avoid running the tank dry. As for
the Hydro-Hot and genset feeds, when your fuel gauge
reads 1/4 consider the tank empty. Diesel fuel is
basically oil and it can gel in really cold weather.
Fuel dispensed in cold climates is "winter blended" to
avoid this problem. If you have a load of summer fuel in
your bus that winds up running you into cold winter
months, you might have problems. In our case, we run
through about 25-30 gallons per month. Less if the
weather is warm and more if it's cold. I'll park the bus
(early October) with about a 1/2 tank of fuel and wait
for the winter blend to arrive in November. I have an
Aero Tec Labs 100 gallon pillow tank which I use to
transport fuel. It's much easier to bring fuel to the
bus than it is to clam up the rig and drive down to the
local truck stop. This gets the tank full of fuel rated
for cold weather. It takes a little experience to judge
how many gallons to transport based on what the fuel
gage reads. Obviously it's better to error on the side
of a little less fuel. You can always make it up on the
next fuel transport run. When the tank hits 1/2 full,
I'll do another fuel run and so on throughout the stay's
duration. Try to keep the air space in your tank to a
minimum to avoid condensation. You can fill a window
washer fluid jug 1/2 full of your diesel fuel and leave
it outside (in shade) to monitor the effects of cold.
I've inspected winter blend fuel at temperatures as low
as -14F and there hasn't been any issues.
Before winter hits you can put a
small amount of diesel fuel in a closed container and
put that in your freezer. A freezer is usually around
0-5F and will be a good way to test if what's in your
tank (or available at the pumps) will gel when old man
winter hits. That said, it's just best to get winter
blended fuel in your tank as soon as possible. The first
winter blend "top off" mixes with what's already in the
tank and I've not had any problems with this. This is
why I let the tank run down as much as possible before
the first "top off". As you replenish used fuel during
the season, the winter blend concentration will continue
to increase.
AC Generator
Most of the larger buses have an
Onan diesel generator on board ranging from 8-10kW. Ours
is an 8kW unit that burns just under 1/2 gallon per hour
at idle and .9 gallons per hour at full load. It's the
most expensive way to produce electricity so use it only
as a backup power source. The other hassle is trying to
figure out what the coldest weather is it will start in.
I've started ours in 8F and it takes a good hour to warm
up completely. I keep the electrical loads light until
it has a chance to warm up. I also start the generator
about every month as a routine to keep fluids moving and
drive out any moisture. It's never a good idea to let
engines sit for long periods of time without running
them.
In a winter's stay we usually
experience several power outages. The longest one lasted
for about 5 hours with typical outages lasting minutes
to an hour. The point is to have your backup system
(generator) ready to go as required. Your biggest
exposure is the electricity required to keep your
external plumbing heat working. I also have an inverter
in my van which is good for 2kW should I need that. A
long extension cord can be run from the van to the
plumbing heaters. The plumbing heaters will draw less
than 500 watts. I also keep an extension cord available
that is plugged into the driver's side outlet circuit.
The plumbing bay heat is diesel and 12 VDC (Hydro-Hot
system). The hydronic heat for the living spaces is also
diesel and 12 VDC. Although this heat alone won't keep
the bus comfortable it is adequate enough to keep pipes
from freezing unless bitter cold sets in. Make sure
you've got good house batteries and they remain fully
charged. Your house batteries will need to provide 15-20
amps to cover all the hydronic heating loads to include
pumps, fans, electronics and turbine motor. You can
light a stove burner for some extra inside heat in real
emergencies. DON'T EVER leave your
stove unattended or fall asleep with a burner lit. Some
may have an external propane cylinder and brick heaters
inside which should be more than adequate for even the
coldest of temperatures. If they need electricity,
you'll need to consider where that ultimately comes
from.
Battery Banks
|
Battery bay
showing house (white) and chassis (black)
battery banks. Inverter charger is in top right
compartment.
|
Buses have house and chassis battery
banks both of which are exposed to outside temperatures.
What's important is to make sure that all batteries are
fully charged to prevent them from freezing. Your
inverter charger will take care of the house batteries
but unless you have an echo charger or some other device
managing your chassis batteries they may become
discharged and freeze. AGM batteries have a higher shunt
resistance meaning they will self discharge about 3% per
month. An extended winter stay of 6 months may put
unattended chassis batteries at risk. January and
February are usually the cold months and full chassis
batteries should be able to stand freezing temperatures
for 2+ months. But why take chances. A battery bay can
have $3K worth of batteries in it all of which could be
ruined in one freeze up in one cold night.
You depend on just one inverter
charger to supply the energy needed to charge house
batteries. The echo charger derives power from the house
bank to keep the chassis batteries topped off. If your
inverter charger malfunctions during a cold snap, what
happens? And think about what happens if you lose your
12 VDC supplied by the house batteries. For starters,
your heating system won't work which keeps the plumbing
bay warm. Also your refrigerator won't work either as
its control circuits need 12 VDC to operate. Other
systems include leveling controls, safety sensors and
alarms. On large Class A rigs figure about 250 watts of
12VDC power just breaks even on low voltage loads.
That's about 21 amps give or take a little. It's a good
idea to have (or be able to get quickly) a backup
battery charger available just in case your main
inverter charger quits for some unknown reason. As shown
in the top right compartment of the photo above, I have
a Magnum Energy pure sine wave inverter charger. The
brand new unit puked a control board shortly after I
installed it. Magnum sent me a replacement under
warranty but it still was a time consuming repair.
Luckily it happened in warm weather. That same repair in
0F would be unpleasant to say the least.
Emergency Power Cord
As previously mentioned, if you lose
utility power on a really cold day your outside plumbing
heat goes dead. Freezing up can occur in a matter of
hours. I installed two GFI outlets in the small storage
bay. One outlet on the driver's side and the other
outlet on the passenger side. These parallel the
existing driver and passenger outlet circuits in the
circuit breaker box. What this accomplishes is to have
easy access to safe protected AC power on both sides of
the bus. Aside from running power tools and Christmas
lights, an extension cord comes in handy for plugging in
your outside plumbing heat. This allows running the
plumbing heat from the generator during power outages.
Service Entrance Ports
|
Use fiberglass
insulation to fill voids in service entrance
ports. Note pipe insulation used to make
grommets.
|
The service entrance ports are the
holes provided in the plumbing and electrical bays to
allow hoses and electrical cables to reach their
destinations without leaving bay doors open. If your bus
is setup like this openings are always larger than the
hoses and cables that pass through them. The resultant
air spaces around these ports allow cold air to enter
during the winter. Vermin can also get in through these
spaces as well. What I do is run a bead of pipe
insulation around the flange to protect the screw cap
threads. Any remaining space is then plugged with
fiberglass insulation for a tight seal (see photo at
right). Drafts owing to air leaks can create cold spots
that can freeze water on really cold days. If you don't
have a temperature sensor on the cold side of the
plumbing bay use a thermometer to make sure everything
stays above freezing. A small electric heater with a fan
can be installed to help keep things from freezing. Some
use an electric light bulb. A Thermocube can turn a
supplemental heat source off and on automatically to
save energy. I say about 200 watts of heat is a good
middle ground to start with. Adjust up or down as
required. How much extra heat (if any) is required
depends on outside air temperatures, bay insulation, air
currents to name a few. Extra footage of heat wiring
might just be enough as shown wrapped around the water
hose in the photo.
Engine And Transmission
Engines and transmissions are made
to be operated on a regular basis. We find ourselves
staying 4-7 months in locations at one time. Because we
transport fuel in we never have a need to drive the bus
before we leave for our next destination. To keep fluids
flowing and moisture away I recommend starting your
engine once per month. Let it run long enough to reach
operating temperature which is around 180F. If you want,
bring the engine speed up to 1000-1500 RPM for 5 minutes
or so. The transmission can be put in gear (D or R)
during engine idle to build up heat in the torque
converter, cycle control valves and move actuators. Let
the transmission fluid get to 120-150F to drive off
moisture, frost, snow and ice that might have
accumulated. MAKE SURE your
vehicle is in park and secure before engaging the
transmission. DO NOT rev
up the engine while the transmission is in gear.
I also cycle the leveling system too by entering drive
mode than releveling the bus. As a safety measure entry
steps will retract when the engine is started. Make sure
no ice has built up on the top step which might jam the
mechanism when it attempts to retract. Also make sure no
shovel handles are underneath fender wells or slide
bottoms. When the bus comes back down from drive mode
you don't want to break anything.
Opinions vary about idling and
running diesel engines just for stationary interval
warmups. If you believe them to be detrimental, it might
be a good idea to include a short drive somewhere.
Personally, I think salt dust from winter roads is far
more of a concern than an interval idle. Whatever you
decide, weigh the pros and cons carefully. A last option
is to do nothing during extended stays. My school of
thought is a periodic warmup drives out moisture and
relubricates internal parts where oil drains away. The
heat from the engine also warms up the engine
compartment which drives out moisture. Ice and snow gets
melted out of the radiator as well. The bottom line is
do what you are comfortable with.
Leveling The Bus
Slide tops and the roof depend on a
level bus to drain properly. If you have an HWH system
it should check leveling every 1/2 hour and make
adjustments. But it's a good idea to keep tabs on this.
A bus that isn't quite level means water might run
toward the slide gaskets and run inside. This is
particularly a problem if ice dams have formed under the
topper awnings or roof. It's important to inspect these
areas on a regular basis until confidence is gained.
Pick a countertop or some other fixed surface to use as
a guide. I made a test level jig just for this purpose.
A spirit level is another good tool for this task. The
important point is to just keep track of your leveling.
Our shower door begins to open on its own when the bus
isn't level. When this happens I know to do a
releveling. It appears the HWH system will attempt
leveling by letting air out of the bags coming off
travel mode. Once leveling can't be achieved by letting
air out, the high pressure air compressor is used to
inflate bags as required. So the bus slowly sinks then
slowly raises itself to maintain a level situation. On
occasion I get an "excess slope" for no apparent reason.
I need to reset and relevel when this happens. I usually
combine this with monthly engine starting cycles.
Entrance Door
This one is a bit of a sleeper and
somewhat inconvenient when it happens. In winter
humidity goes down outside which creates a gradient
through the walls. Moisture then migrates from high
concentration (inside) to low concentration (outside) by
a process called osmosis and diffusion. Sources of
moisture are the human body, showers, cooking and
burning propane. Moisture can't be eliminated completely
but it's a good idea to try and cut it down. In extreme
cases a dehumidifier will help remove unwanted moisture
from the air. Your entrance door is just another wall as
far as moisture is concerned with one important
exception. It contains the locking and latching
mechanisms required to get in and out of the bus. The
door also contains an enclosed cavity that traps a
volume of air. In really cold weather the inside of the
exterior panel is below freezing. Moisture diffusing
through the door will freeze on this surface and
anything else inside the door that's below freezing. If
you are parked such that the door gets direct sunlight,
frost will melt and recondense in other places. Those
other places include lock tumblers, levers, latches,
automatic entry systems and alarm controls. When that
condensed moisture freezes at night it can bind your
lock. If this happens after you leave and lock up during
the day, you may find yourself unable to budge the lock.
It's also easy to break a key off in the lock.
Our first season in winter didn't
find us dealing with this situation. However, the second
season was a different experience owing to a different
parking space and less direct sunlight on the door. A
gazebo blocked all but an hour or so of morning sun.
This hour of sun wasn't enough to melt ice, warm the
interior of the door and drive out moisture. Thus it
continued to build up and eventually froze up the locks
on a cold winter night. Of course it happened in such a
way as to lock us out. The solution was to get a hair
dryer from a local store, plug it in and heat up the
door locks and latch. It took about 15 minutes or so to
melt the ice and free up the mechanism. This is
something to think about and plan ahead by having a heat
source available outside if you need it. Locate (or
create) a place to plug it in.
Water Lines
We hit this one during a cold snap
of several days between -9F and -14F. During the day it
didn't get above 5F. Our parking space finds us with
only one side of the bus in direct sunlight. The
driver's side is the cold (shaded) side. There is one
set of PEX water lines that run along the driver's side
wall to the bathroom sink. These lines are enclosed in a
wooden box that runs along the floor. This box creates
sort of a hose and cable raceway in an air space that
isn't part of the heated inside air. During those really
cold days, temperatures fell below freezing inside the
box and froze up the hot water line. I suspect this line
was near or against the outside wall. Luckily the frozen
section wasn't severe enough to burst the line or any
fittings. I applied heat from a hair dryer for just a
few minutes and the line opened up. Some extra heat in
the form of a small forced hot air heater put inside the
cold end of the plumbing bay would have avoided this.
That heat would rise to warm the floor just enough to
keep this enclosed air space from falling below
freezing.
Conclusions
This completes Part I which deals
with the outside issues one might expect to face during
a winter season stay. It's by no means exhaustive or all
encompassing. I hope the article will get you thinking
about your specific situation by illuminating our
experiences and the lessons we learned. I hope it will
also help you evaluate whether a winter stay is for you.
If you do decide to go through a winter, perhaps the
information presented herein will help you get better
prepared. The point of a stay is to have fun and enjoy
yourself and not get hammered by old man winter. Staying
the winter months in a bus clearly isn't for most
people. It also has its dangers that shouldn't be taken
lightly. There certainly are many reasons to avoid it.
But if you like to be close to winter sports and are
willing to undertake damage control measures the whole
winter experience can work. For us, it beats hotels,
crowds, airports and the single week vacation window. As
for cost, it's much cheaper to stay in a warmer climate.
In Part II I'll be exploring the
winter stay from inside the bus. There are lots of
little things you can do to save energy, cut costs and
improve comfort. Some of these are obvious while others
are less so.