Roof servicing - how often ?

Our TPO roof has a 12 year warranty, but it's the seams where the caulking is that should be inspected at least yearly, most manufacturers suggest every six months. Cracks in the caulking should be touched up with self-leveling Dicor (available from CW) to prevent water intrusion.

Water can penetrate theses roof seams without ever showing any indication in terms of spots on interior ceiling. Use a ladder to view roof, vent, and antenna seams, as stated use a wide piece of plywood to displace weight if needing to touch up seams unreachable from ladder.