Attic Insulation Condensation

Attic condensation during the winter can decrease the effectiveness of insulation and over time can cause significant damage to structural elements in the attic such as rafters or trusses.

Attic insulation condensation.

Insulation is responsible for keeping warm air inside your living space and out of the attic where it can lead to condensation. Traces where water has trickled down the walls. Applying mastic gum to the duct joints and adding an r6 layer of insulation around your sheet metal ducts goes a long way toward protecting your attic and ceiling. Warm air escaping from a duct into a cold attic can create condensation and encourage mold growth.

For a more detailed explanation see my article on condensation in buildings. In the real world this means moist air from your house coming into contact with the underside of your cold roof tiles or the side of your water tank etc. It is common for poorly vented and insulated attics to develop attic condensation. It can also cause mold to grow on roof sheathing trusses rafters and ceiling floor.

And the same factors that cause attic condensation problems also cause ice build up on roof edges which can lead to ice damming. To save time and better pinpoint the problem you can hire a professional to inspect your insulation and fill any gaps that might be letting warm air into the space. Signs of condensation in the attic may include the following. Next take a look at your attic ventilation.

Condensation will form in your attic if warm moisture laden air comes into contact with a cold surface. Noticeable musky damp odor. Moisture forming on the glass window panes or other flat surfaces.