Also, would it be possible to run the vents to the nearest wall, gable end, and run them out there? Rather than going through the roof. I am not real big on cutting more holes in the roof than is necessary. Is this safe for the dryer? The owner's manual says with two 90 degree turns the vent pipe can still be a total length of 38 feet. Kurt, besides the whtie paint, there is a fine white dust on most of the trusses and sheating. I assume this may be from the exhaust of the dryer, but I am just very nervous about mold. The good thing is that there are attic vents near where both these vents terminate, so hopefully this has helped the problem.