I framed over the existing roof on a mobile home adding a one foot overhang and osb + felt +shingles also laid in 6 inch insulation over the existing metal roof of the trailer. Now , after about a year The ceilings inside are showing water stains and the ceilings are bowing downard. The wood system itself is not sagging just seems like moisture is condensing out above the ceiling and being absorbed by the celotex type ceiling causing it to bow downward. The tenants have been using kerosene heaters rather than the vented gas furnace provided but the problem didn’t start until after we added the new roof.
If you have any thoughts or suggestions about this problem please reply.
Edited 3/30/2002 11:49:57 PM ET by ARROWSHOOTER