We have a small building in need of roof replacement, it is flat top with rotted wood and rain pours through. We plan replacing this roof with a tin one, should be tear out the rotted wood first or place the tin on top of the resisting. :confused:

Replace rotten wood before installing metal roofing. Will give stability needed for tin.

Good luck

Chuck

A tin roof is not recommended for flat installation.

Do you know what the pitch is here or is it actually a flat roof. If it is a basic flat roof the use rubber to re roof it.