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14
Condensation
Excess moisture trapped within your motorhome can
cause severe long-term damage to laminates, surfaces,
xtures and other components of your motorhome.
erefore, it is important to follow moisture-reducing
procedures as a normal routine of motorhome ownership
and maintenance.
TIPS FOR CONTROLLING CONDENSATION
• Allow excess moisture to escape to the outside when
bathing, washing dishes, hair drying, laundering, and
using appliances and non-vented gas burners by open-
ing ceiling vents.
• Always use the vent hood when cooking.
• Keep the bathroom door closed and the vent or window
open when bathing and for a period of time aer bathing.
• Do not hang wet clothes in the motorhome to dry.
• In hot weather, start the air conditioner early in the
day as it removes excess humidity from the air while
lowering the interior temperature.
• Keep the interior temperature set as reasonably cool
during cold weather as possible. e warmer the
motorhome, the higher the temperature dierential
between the cold wall surface and the interior air,
which can contribute to the formation of condensa-
tion on wall surfaces.
• Use a fan to keep air circulating inside the motorhome
so condensation and mildew cannot form in dead air
spaces. Allow air to circulate inside closets and cabinets
(leave doors partially open). Please keep in mind that a
closed cabinet full of stored goods prevents circulation
and may contribute to the formation of condensation.
• A natural tendency would be to close the motorhome
tightly during cold weather. is may actually increase
inside humidity. e warm inside air may be more
humid than the cool outside air. Allowing some cool
outside air into the motorhome may help reduce rela-
tive humidity inside the motorhome.
Seals and Sealants
e exterior shell of the motorhome is the primary weather
and moisture barrier. Over the life of the motorhome, the
shell will require regular care and maintenance. e shell
includes the roof, sidewalls, windows, doors, and under
carriage of the motorhome. Regular inspections and
maintenance is required to ensure the exterior shell pro-
vides a barrier against water intrusion.
e shell should be inspected periodically for cracks, tears,
gaps, and condition of sealants. Check corner and joint
moldings for sealant damage. Areas that require main-
tenance should be resealed utilizing a high quality sealant
that has the same or similar characteristics as the original
sealant materials.
Particular attention should be devoted to ensure slideouts
are sealed properly. Regularly inspect slideout seals for
chips, cracks, or other damage. Repair or replace damaged
slideout seals as soon as possible. Check door, window,
and vent seals for cracks, chips or other damage and replace
damaged seals as soon as possible.
NOTE: Damage caused by deficient sealant main-
tenance is not covered under the Thor Motor Coach
Limited Warranty.
Cold Weather Usage
When using your motorhome in freezing or below freezing
temperatures, these precautions should be taken:
• Make proper preparations to avoid freeze damage of
the fresh water and drainage systems.
• Propane regulator freeze-ups can occur in any weather
if there is moisture in the tank or if the tank has been
over-lled. Always use moisture-free propane fuel and
make sure the tank is not lled beyond 80% of capacity.
• Ventilation or the use of a dehumidier (customer
supplied) may be required to reduce condensation.
• To avoid damage due to cold weather, check the exte-
rior extrusions for frozen moisture before operating
or using the motorhome compartment doors, locks,
slideouts, windows, vents, etc.
• To protect from freeze-damage, it may be necessary
to winterize the water system. Refer to Section 12,
Winterizing the Water System.
NOTE: Damage caused by the use of your motor-
home in freezing temperatures and/or performing
deficient cold weather precautionary measures is not
covered by the Thor Motor Coach Limited Warranty
or the Thor Motor Coach Structural and Lamination
Limited Warranty.
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