White Powder In Attic

The client will certainly expect an explanation for this white material on the roof rafters in the attic. In the attic photograph at left we show a mix of green gray and white attic mold. There was some moisture damage but the powder was in other areas also.

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White powder in attic.

Efflorescence occurs when moisture moves through concrete or other masonry. 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. When looking for attic mold trace both leak. The moisture picks up minerals carries them to the surface of the masonry and leaves them behind in the form of tiny crystals on the surface as the moisture evaporates.

When the water evaporates a white fluffy structure is left behind. Is is safe to conclude that this is what i found. It is difficult to declare this one substance over another simply based on one s senses of sight or smell. Rock wool is usually gray white off white or brownish white.

I found this white powdery substance on some of the sheets of plywood and covering the attic insulation. Should i recommend that this substance be tested to see what it is. It is a manufactured product made by melting basaltic rock and dolomite with added binders. I found white powder spread in an attic.

The white material which appears on brick is a powdery mass of minerals called efflorescence. This growth while harmless can appear very similar to white mold growth. After all some mold shows up as a white powdery material but more often in a crawl space than an attic. The house was originally built in 1979 but the powder was also in areas of the attic which were added later due to additions.

White powdery substance in attic. Common areas of white mold growth include attic sheathing and crawlspace framing. White mold can be found anywhere conditions conducive to mold growth are present. I did some searching and read a few things that talked about baby powder or talc powder being used as a deterrent for ants.

The raw material is heated to 2 750 degrees fahrenheit until it melts then the molten material is spun into fibers with air pressure.

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