Interior Leaks

This clip is from Pillar to Post:

In some cases what appears to be a roof surface leak is not a leak at all, but rather an interior source of water. Here are some example:

Air leakage from the house: If household air can leak into the attic, the warm moist air will condense on surfaces in the attic during cold weather. This can cause damage to the roof decking and structural framing and in severe cases cause water to drip back into the house. Sealing the house from the attic in cold climates is very important.

Leaking forced air ducting: If heating and cooling ducting runs through the attic, they should be well sealed, to prevent condensation in cold weather.

Air conditioning ducting: If air conditioning ducting runs through the attic, it should be well insulated and should have a good vapor barrier.

Attic mounted heating and cooling: High efficiency furnaces and air conditioning evaporators located in the attic can create condensation and leak into the house.

PILLAR TO POST ® HOME INFORMATION SERIES