jonescpd
Jan 01, 2016Explorer
mildew lines on roof
Looking at the roof of my 2015 salem there are what looks like 1" wide black mildew lines every 4 or 6 feet going across the roof which seems to follow internal stringers. Is this normal? The roof was last washed around September using murphys oil soap. The lines are very pronounced and defined and it seems wierd that the coincide with the internal roof structure.