Mold In Attic On Inside Of Roof

In the vast majority of cases the mold growth is caused by condensation.

Mold in attic on inside of roof.

In our roof interior attic photo at left you can see antique roof framing along with black stains and probably some mold growth from a long history of roof leaks. Unfortunately by sealing the vents or tacking insulation to the underside of the roof we create ideal environment for attic mold to grow by keeping moist warm air trapped inside. Roof leaks will often lead to a small localized area of attic mold near where the leak is occurring. Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored.

Even if your roof and windows don t leak though humidity in the attic can lead to the growth of mold. The presence of mold inside your home even if it s in an unused place such as the attic can cause. Also plumbing stacks in the attic can be a source of condensation which can lead to attic mold growth. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.

So how good is your attic ventilation. A perfect time to find out is the next snow storm. If you look at your roof for several days after it snows and you see an. Even in this case in our opinion the reasons to remove and replace roof sheathing and framing would normally be based on the condition of the roof framing and sheathing not on the.

This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.