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Get rid of soot by repainting the room with staiblocker

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Anna Ageyev says:
March 25, 2009 at 2:39 pm

Is it posible to get rid of soot by repainting the room with staiblocker and stuff. We have a tree growing on the other side of the wall, really close it touches the siding, we think that is the problem so we will cut it off. And we have that only in that room. Any suggestions? Thanks
asked in Interior Walls by darekrudy (21,730 points)
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1 Answer

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Hello Anna,

Good stain blocker should seal that contaminated area. However, if it is only this one sooty spot on the wall / ceiling corresponding to the tree on exterior, I would also check your exterior wall finish condition, flashing and roof/gutter/attic section directly above this spot.

There must be a reason for the soot accumulating in this particular area – make sure that it is actually soot / not some king of a mold caused by excessive moisture. Shade / the tree could be responsible for trapping moisture in this area / slowing evaporation, but the moisture must penetrate the wall somehow.

There is more about it here: stains on walls

answered by darekrudy (21,730 points)