I am about to replace the roof on my house. I noticed that the shingles
around the heating exaust vent are covered with some white stuff.
I asked the roofer what the cause might be and he had no clue. Does anyone
observed something similiar? I don't want my new roof to be spoiled in a few
Maybe the exaust vent has to be taller?
Is it like that only around that vent or all of them? Many roofs get
fungus growth in a line below all the roof jacks because the rain water
doesn't wash as well there. For you new shingles, be sure to get
anti-fungal coated shingles to eliminate this problem.
As for your furnace vent, it may be something else. Is it uniformly
distributed around it or just on the downslope side? I'll bet it is a
fungus, though usually those are black.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.