White Mold In Attic Roof

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White mold in attic roof.

On the east side only there is black mold for the first 6 up the slope. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. There s an underlying moisture issue that needs to be resolved because mold requires moisture to grow and spread. Mold usually causes a musty odor and may cause staining that may be black brown gray white yellow or green.

Typically the condensation is caused by several compounding factors. Additionally efflorescence will typically dissolve under the application of a water mist while mold growth will not. Also notice the condensation stains at the shingle nail more evidence of a history of attic moisture which was a factor in this mold growth. Because the majority of attic mold cases are caused by condensation it means you ll rarely find a smoking gun.

Identifying the roof cause of attic mold. This is where it gets tricky. Attics usually have a passive ventilation system in which outside air comes in through the soffit eave vents at the bottom warms up in the attic and escapes through the can or ridge vents at the top because hot air rises. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.

The mold shown in the attic photographed above was identified as aspergillus sp. The roof has baffles at alternating thusses soffit and ridge vents. Mix 1 teaspoon of white vinegar or tea tree oil with each cup of water that you need to attack your mold colony. Attic mold left unchecked can grow and lead to structural deterioration of attic sheathing and roof structural elements.

Attics contain plenty of food sources for mold including wood and insulation. On attic mold visible on pine tongue and groove roof sheathing near the building eaves. Tea tree oil and white vinegar are both completely natural and safe for wood but. The white blown in insulation was used.

The attic is truss framed with plywood sheathing. The most common cause of attic mold by far is blocked or insufficient ventilation of the attic space. There are two main factors that cause condensation. The mold itself may have a cottony texture but can also be velvety leathery or.

Common areas of white mold growth include attic sheathing and crawlspace framing. In the vast majority of cases the mold growth is caused by condensation.