One of the leading culprits for warm
moisture entering your attic is the lack of insulation or improperly installed
insulation. Examine the insulation in the attic and make sure there are no
openings in the insulation to allow for warm air to rise into the cold attic
space. When warm moist air and cold air, come in contact with one another,
condensation forms on the attic ceiling and roof rafters. When the attic air
temperature falls below 32 degrees the condensation freezes on these surfaces
causing frost to form.
|Another area of the attic to check for the infiltration of
moisture is the chimney. If your house has a chimney check to make sure
there are no signs of water infiltration around it. It is best to examine
the chimney after a good soaking rain storm. Examine the chimney in the
attic and look for streams of water or dampness around the bricks. If there
are signs of water on the chimney then you need to apply a sealant or water
repellant to the outside of the chimney.
However, you will need to wait for warm whether to apply the sealant. You may
also need to re-install the flashing around the chimney. Make sure the flashing
is installed properly and not damaged in any way.
Finally, one of the leading culprits
for warm moisture working its way into your attic is bathroom ceiling fans.
Check to make sure the bathroom ceiling fan vents and vent pipes are properly
connected and that they vent to the outside of the home. On several occasions of
examining attics, I have discovered bathroom ceiling fans directly exhausting to
the attic. The moisture associated with those hot steamy showers is captured in
the cold attic and forms frost once the outside air temperature drops.
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To conclude, frost in you attic is a
sign of moisture in your attic, and unrestricted moisture in the home should not
be ignored. Moisture left unchecked will eventually form mold and mildew which
can lead to health problems with the occupants of the home.
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