White Powder On Roof Timbers

It dissolves in warm or hot tap water with a little bit of stirring.

White powder on roof timbers.

A dry rot treatment may be advisable too. The house was originally built in 1979 but the powder was also in areas of the attic which were added later due to additions. Typical roof mould damp cold timber condensation mold growth. After all some mold shows up as a white powdery material but more often in a crawl space than an attic.

The white stains shown on this wood shingle roof are in fact not a stain but an absence of lichens or moss. There was some moisture damage but the powder was in other areas also. Once mixed and all the powder is dissolved just pour the solution into a garden hand pump sprayer and squirt it on all the lumber that s got mildew and mold on it. The client will certainly expect an explanation for this white material on the roof rafters in the attic.

Algae lichens and moss for example. Metal salts washing down the roof surface from metal chimney flashing are often enough to kill of biological organisms that otherwise stain various roof surfaces. It is difficult to declare this one substance over another simply based on one s senses of sight or smell. It sounds like dry rot as white powdery growth is a clear indication of dry rot it is common for this to occur and can sometimes be stopped by simply clearing it off the infected area and making sure there is better ventilation.

I found this white powdery substance on some of the sheets of plywood and covering the attic insulation. White powdery substance in attic. Hi there efflorescence is not found in timber it is usually found on bricks tiles or stone products is a result of the salts or potash being drawn out by the evaporation of moisture in the product as the moisture evaporates crystals are left on the surface since timber does not have salts or potash in it it is very unlikely this is efflorescence you can see unless it has dripped on from some other surface. Indicates condensation increase ventilation add soffit or ridge vents apply mould cleaner treat with boracol 10rh.