Test Your Knowledge

How does your understanding of mold-related issues compare to what the experts are saying?

photo-231. What is the difference between mold and stain on lumber?

iA. Unlike mold, typical sap or blue stain fungus penetrates deeply into the sapwood and cannot be removed by surfacing or chemical cleaners. iB. Unlike typical sap or blue stain fungus, mold penetrates deeply into the sapwood and cannot be removed by surfacing or chemical cleaners. iC. Stain is an appearance characteristic only and, unlike mold, does not affect lumber strength or utility. iD. Mold is an appearance characteristic only and, unlike stain, does …