Using Metal Roofing Under Deck

Get double duty out of your metal roof with this free standing car port.

Using metal roofing under deck.

For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. Traditionally metal roofs have used standard 30 pound felt paper underlayment. For a house roof the recommended minimum slope is 2 5 vertical inches for every horizontal foot but a nearly flat roof is fine for under deck installations. Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes.

Installation was pretty easy. The best underlayment for metal roofs. Buy 3 x12 26 gauge roofing panels from a big box store screw progressively thicker strips of wood to the joists to provide slope screw the roofing panels to the strips of wood use a gutter to catch the water at the lower end. Rune bought corrugated fiberglass panels at a home center to use for his under deck roof.

The panels he used are 26 in. Solid decking should be used with non structural style panels such as mbci s craftsman series small batten panels. Step 2 install a wood support structure for your panels screwing a row of 2 by 4s running parallel to your wall every 2 feet along the underside of your deck. He attached the panels with special roofing screws that have hex heads and neoprene washers for sealing.

The existing deck is 12 x36 and i will be sloping the short side. Right now my intention is to. It s made of a sturdy vinyl coated electro galvanized steel and has a 15 year warranty. A solid deck substrate may consist of panels solid sheets or closely spaced deck members made of wood metal or composite materials to which the roof membrane is applied.

Round up the materials for an under deck drainage system. Used as shade cover on. The first goal of roofing underlayment is to keep the roof deck dry before installation of the metal roofing material.