Mold On Attic Rafters

An average cost for standard mold remediation in an attic can cost between us 2 000 and 6 000 depending on the size and growth area.

Mold on attic rafters.

The white blown in insulation was used. On the east side only there is black mold for the first 6 up the slope. Each time it rains or snows water accumulates in your attic degrading the structure of the building and also leading to the formation of mold in the attic. Mold usually causes a musty odor and may cause staining that may be black brown gray white yellow or green.

Attic mold is often caused by warm moist air from the house leaking into the attic space. This is typically done with an ulv fogger and sprayed throughout the attic area. Faulty roof insulation or construction can lead to leaks and a lack of proper ventilation can cause humidity to accumulate. 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.

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. This causes condensation to form on the cold surfaces in the attic especially roof rafters sheathing and trusses. The attic is truss framed with plywood sheathing. However if the mold infests the internal structures you need to shell out between us 10 000 and us 30 000.

The most common cause of attic mold by far is blocked or insufficient ventilation of the attic space. The mold shown in the attic photographed above was identified as aspergillus sp. The mold itself may have a cottony texture but can also be velvety leathery or. A leaking roof can contribute to attic mold in a major way.

Even if your roof is somewhat new chances of a leak can increase after the roof is disturbed in any way for work around that area. Replacement of insulation may be necessary if this is the case. The roof has baffles at alternating thusses soffit and ridge vents. If the mold growth in the attic is pronounced you may see it presenting atop attic insulation.

The black growth on attic sheathing and rafters consists primarily of species of cladosporium alternaria or other genera of micro fungi but rarely if ever the potentially toxic stachybotrys mold black mold because attics are not consistently wet enough to sustain this kind of mold. Here are some recommended methods to prevent mold growth. How to prevent black mold in attic. Click photo for larger image.