- Q.How should metal roof
panels be joined in high-wind areas to prevent water
A.The most effective approach
is to seal all joints with butyl sealing tape,
which should be available from the supplier of the
metal roofing. The tape has a paper backing and is
applied between the sheets as they are installed.
It is more effective than caulk, and since the
butyl does not cure, it tends to creep within
joints to absorb the movement of the metal with
changes in temperature. Where the problem is
severe, two strips of tape may be necessary.