An EPDM roof can develop openings at its splices, corners or damaged field. It lets go at the splices and the corners, where rubber that has been pulled tight finally gives up. The big black sheet is forgiving. The small joints around it are not.
EPDM is a synthetic rubber membrane, sold in wide rolls so there are fewer seams than most roofs have. It stretches, its impact performance depends on the selected membrane and supporting assembly, and it has been laid on flat roofs for a very long time.
Here is the plain version for owners in Clearwater, FL. Rubber ages in the sun. Its seams depend on adhesive or tape, not heat welds. And the wet season tests both, every afternoon, from late May into October.


