Roof Is Damp In Attic

The source of the attic moisture is usually indoor air that enters the attic through ceiling cracks.

Roof is damp in attic.

Moist or wet insulation. If you suspect you have moisture problems in your attic check for the following indications of excess moisture in the attic. There are dozens of things that can cause condensation buildups in the attic one of which is a leaking roof. Finding water damage on the wall or ceiling is worrying for any homeowner.

Water or drip marks scattered on the attic floor. If attic air is humid and roof sheathing is cold condensation or frost can accumulate on the underside of the sheathing. In the vast majority of cases the mold growth is caused by condensation. And to make matters worse these holes are not easily identified unless it s raining.

Moisture frost and ice buildup on roofing nails. Noticeable musky damp odor. Even a small pin head sized hole can send gallons of water pouring into your attic over the course of a couple months. The cause depends on whether you have an unconditioned attic or a conditioned attic.

Fixing this issue can be less costly than replacing a roof but it should be addressed as soon as possible. Most people assume this is caused by a leaking roof but that might not be the source. Water found in these places is commonly caused by condensation in the attic. The typical expected cause is water penetration from the exterior due to a defective roof covering.

A roof timbers within an attic can become damp from two sources. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.