Mold On Roof Trusses

If the mold growth is thick may need to soak the trusses and plywood.

Mold on roof trusses.

Fungus and mold will grow on the trusses if the lumber moisture content exceeds and remains above 20. The black mold is on the first 3 truss panels. At the south end of the roof the ridge changes direction causing an overlay condition. If the wood used in trusses is kiln dried the moisture content is equal to or less than 19.

Cleaning mold from wood trusses and cross bracing. If you ve had experience with mold and mildew in the home you know the best mildew remover is chlorine bleach. Mold is a symptom of high moisture which if allowed to exist for prolonged periods can be damaging to any structure and will promote the development of wood decay fungi. In the vast majority of cases the mold growth is caused by condensation.

20 in the host material it will not release spores. This growth will cease once the moisture content drops to 19 or less. Fact mold on the surface of lumber does not cause rotting or otherwise affect the strength of wood framing. If that s mold and it looks like mold unless it s provided with enough moisture to start reproducing approx.

Re roofing with lining lining papers sarking roofing felt can cause severe mold growth and rot due to reduced ventilation. Skips a few trusses and reappears on the next panel or two. But outdoor heavy duty cleaning usually calls for more heavy duty mixtures such as tsp and chlorine bleach see the tsp page for more details or specialty additives such as jomax from rustoleum which combines a cleaner with a bleach activator. You can effectively kill mold on wood in your attic using moldstat mold killer by soaking the mold growing on the trusses and plywood and allowing it to stay wet for at least 10 minutes then air dry.

Mold on attic sheathing. Mold usually causes a musty odor and may cause staining that may be black brown gray white yellow or green. Kshepard kenton shepard cmi june 18 2009 1 47am 5. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.

The roof has baffles at alternating thusses soffit and ridge vents. Water leaks and poor ventilation leading to condensation are the main roof defects which give rise to a variety of fungi moulds and insect attacks. The mold killer solution can be applied using a pressurized sprayer or for deeper penetration the fogmaster mold fogger. The mold itself may have a cottony texture but can also be velvety leathery or.

A 10 x 10 area of plywood has been removed to provide air into this area.