Cleveland home inspector explains the reason you have mold (mould) growing on your basement joists, basement sheathing, and other basement timbers. This surface “black mold” and other colored moulds are very common in old houses and new homes. Forest trees are cut down and the logs are sent to the “saw mill” to be cut. This wood is sawn into joists, rafters, studs, and beams. This wood is also sent wood processing plants to be fabricated into plywood, OSB, press wood, laminated wood, engineered wood, micro lambs, and TGI’s. These finished timber products are then delivered to the lumber yard and stores like “Forest City” “Home depot” Lowes, Menards, and others. Regardless, whether the storage facility is interior or exterior, these storage areas generally have some moisture and some humidity. Additionally, the wood is still fresh due to it being recently cut and may still during out. Mold spores are everywhere and they will grow on any cellulose product if permitted. These freshly cut stored timbers which may still be drying out are made of cellulose. Mold spores attach and begin to grow. This fresh wood is then purchased and installed in new homes and new additions. During construction, the basements are wet, moist, humid, and dark. These are perfect environments for fungal amplification or mold growth. After the new windows, roof, doors, and siding installations are complete, the interior house moisture becomes trapped. This trapped moisture becomes much larger after the drywall, joint compound, and painting work have been completed. Additionally moist air is lighter than dry air and it rises just like when water evaporates from wet grass to form rain storm clouds. The upper basement joist areas are cool, dark, moist, and enriched with mold spores and the mold continues to grow on the surface of the wood. Sometimes, the mold is black, white, yellows or even fuzzy. Testing the mold is generally a waste of money. If you see mold, smell mold, its mold.
After the home dries out, and the homes humidity level is lowered, this surface mold no longer grows or amplifies. This surface mold can be easily washed, cleaned, and sanitized.
When you build a new home or a new addition, it is very important to run the AC and to run the dehumidifier so you can dry the new home quicker.
If you have an older home, you need to identity the moisture source or the moisture generator and remove it. Sometimes it is as simple as conditioning a crawl space which would includes a 100% sealed vapor barrier, printer insulation, heating and dehumanizing, , sealing the sump pump with a 100% sealed lid, removing ventless appliances, or running a basement dehumidifier.
Thank you this has been “Home Inspector” Marko Vovk (Wrong spelling sometimes used “Marco, Volk””,Marco Vouk” or “Marko Voke”) from http://houseinvestigations.com/
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