How To Install Metal Roof Panels Under Deck

For exposed fasteners avoid over tightening the fastener.

How to install metal roof panels under deck. This is part 1 of a 6 part video series explaining how i installed a metal roof on my house. Work toward the ridge. Close or seal off the ends with a wood or plastic strip under the panel at each end. 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.

Install the roofing screws vertically along each rib in the panel. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. Place them directly onto purlins that are attached to the roof trusses beginning on the outside edge. Install the first metal panel on the low end of the roof square to the eave.

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. Space the screws about 12 in 30 cm apart. These will stop the entry of rain wind and pests. Overlap the edge of the roof by 1 inch.

First mark all the purlin locations on the deck joists. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Use your neoprene washer head screws to secure the metal to the sheathing. Install the purlin along the house and the outer purlin.

If the span under your deck is 12 ft for example the purlin at the outer end of the deck should be 3 in. Then stretch a string between them. Secure the metal panel to the deck by drilling 1 1 2 inch galvanized metal screws through the peak of the rib in 12 inch to 16 inch intervals. In this video i cover measuring the roof figuring the metal th.