How to Install Metal Roofing

Apply the underlayment

• The first layer on top of the plywood or OSB roof deck is underlayment. For this, we chose a self-healing ice-and-water membrane to protect the shallow-pitched roof deck.

• The tricky part in laying the underlayment is keeping it flat and wrinkle-free. Unroll the underlayment across the roof while removing the bottom half of the adhesive backing. Overlap the previous layer by six to eight inches. Once the underlayment is rolled out, cut it flush and pull the rest of the adhesive backing out from underneath.