Black Mold On Roof Rafters

Attic mold left unchecked can grow and lead to structural deterioration of attic sheathing and roof structural elements.

Black mold on roof rafters. Leaks in the roof may also cause black mold in the attic. The black mold is on the first 3 truss panels. This causes condensation to form on the cold surfaces in the attic especially roof rafters sheathing and trusses. The mold itself may have a cottony texture but can also be velvety leathery or.

Mold usually causes a musty odor and may cause staining that may be black brown gray white yellow or green. There s an underlying moisture issue that needs to be resolved because mold requires moisture to grow and spread. 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. In the attic photograph at left we show a mix of green gray and white attic mold.

Black mold in attic. At the south end of the roof the ridge changes direction causing an overlay condition. The roof has baffles at alternating thusses soffit and ridge vents. Mold species such as stachybotrys chartarum which looks like slimy growth loves attic basement bathroom and space under the sink.

A 10 x 10 area of plywood has been removed to provide air into this area. Skips a few trusses and reappears on the next panel or two. Not only can this cause black mold to grow on the inside it may also cause damage to the outside of the home as well. Attic mold is often caused by warm moist air from the house leaking into the attic space.

The photo at page top shows white attic mold on the roof sheathing and rafters and some brown or black mold on the attic side of ceiling drywall where we pulled back insulation.