Attic Moisture On Interior Siding

Once the weather starts getting cold we get many calls from homeowners saying that they have a roof leak showing up as widespread moisture on the inside surface of the plywood and nail points inside their attic.

Attic moisture on interior siding.

The humidity in the basement measured 40 the first floor was 45 50 but the attic was 62. You re building a wall. Add insulation install louvered doors reduce humidity. Maybe you re putting on an addition or finishing off your basement or maybe you are just about to undergo a major renovation that requires taking the existing wall down to the studs.

To prevent moisture from building up in your attic you need to make sure your attic has enough ventilation and won t get too hot. Whether you are doing it yourself or hiring a contractor it is a helpful to know a little about proper. The moisture was rising with the warm air of the home as it escaped past the insulation and it was trapped in the attic because there was no roof. It could be used to confirm water intrusion problems or confirm that wood is saturated with water.

The first floor and one in the attic. The exterior walls are covered with a moisture barrier and siding while the interior generally features another moisture barrier underneath the sheathing. In most cases it s enough to keep the. Whatever your reason you are now looking at finishing a new wall.

Mildew on exterior walls. Reduce interior moisture level allow moisture to escape behind siding. Moisture meter a moisture meter is used to detect or confirm moisture. The temps in the attic will be higher than the exterior temps when there s poor ventilation if it s a summer day and 80 degrees out side and a quick cloud cover rain shower comes through the exterior temps will drop numerous degrees in minutes the interior will not change as quickly thus condensation reaction occurs.

No heat source or inadequate air circulation. A magnet can be used to tell the difference between aluminum siding and steel siding or galvanized steel flashing from copper flashing. There are meters that are non invasive and. I first encountered this problem in my early years in business when a roof we replaced kept having this same problem sometimes forming sheets of ice all over the interior sheathing.

Attic moisture can cause mold and mildew as well as ice dams in the winter. Mildew on interior walls or in closets. Creating ice dams that lead to interior leaking and roof damage. You may find the insulation missing or bunched up so that it isn t doing its job in the affected area.

Sealed attics trap excessive heat and moisture which can lead to reduced shingle life. If this occurs in isolated spots check the attic. Remove by scrubbing repaint with mildicide containing paint.