Mold On Attic Rafters

Faulty roof insulation or construction can lead to leaks and a lack of proper ventilation can cause humidity to accumulate.

Mold on attic rafters.

The roof has baffles at alternating thusses soffit and ridge vents. A leaking roof can contribute to attic mold in a major way. This causes condensation to form on the cold surfaces in the attic especially roof rafters sheathing and trusses. 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.

On attic mold visible on pine tongue and groove roof sheathing near the building eaves. The attic is truss framed with plywood sheathing. 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. If the mold growth in the attic is pronounced you may see it presenting atop attic insulation.

3 fog the attic with a mildicide. Attic mold is often caused by warm moist air from the house leaking into the attic space. 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. How to prevent black mold in attic.

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. The mold itself may have a cottony texture but can also be velvety leathery or. Click photo for larger image. 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.

Here are some recommended methods to prevent mold growth. The white blown in insulation was used. The mold shown in the attic photographed above was identified as aspergillus sp. This is typically done with an ulv fogger and sprayed throughout the attic area.

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 growth in an attic comes as a consequence of excess moisture. Replacement of insulation may be necessary if this is the case. The most common cause of attic mold by far is blocked or insufficient ventilation of the attic space.