White Raised Dots On Attic Rafters

After all some mold shows up as a white powdery material but more often in a crawl space than an attic.

White raised dots on attic rafters.

It is difficult to declare this one substance over another simply based on one s senses of sight or smell. In the attic photograph at left we show a mix of green gray and white attic mold. When looking for attic mold trace both leak. If the roof structure consists of trusses rather than rafters particular attention should be paid to.

The client will certainly expect an explanation for this white material on the roof rafters in the attic. 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. White mold tends to grow in high humidity environments rather than areas suffering from total saturation. The house was originally built in 1979 but the powder was also in areas of the attic which were added later due to additions.

I suggested further evaluation but i was wondering if anyone has ran into this before. This is why it s less common to see mold growth on base trim after a flooding event. If the framing in the attic shows evidence of physical damage further evaluation is needed. Attics may be painted white to cover over evidence of a fire in the attic or home.

I found this white powdery substance on some of the sheets of plywood and covering the attic insulation. The vast majority of attic mold is caused by humidity which is why white mold growth is common here. A few people will paint their attic white just because they think it looks better or think that it makes the attic look brighter when the attic lights are on while putting holiday storage boxes in the attic. There was some moisture damage but the powder was in other areas also.