How To Install Metal Roof Panels Under Deck

Install the roofing screws vertically along each rib in the panel.

How to install metal roof panels under deck.

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. Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof. This is part 1 of a 6 part video series explaining how i installed a metal roof on my house. Space the screws about 12 in 30 cm apart.

First mark all the purlin locations on the deck joists. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. Place the first screw. Install the purlin along the house and the outer purlin.

Overlap the edge of the roof by 1 inch. These will stop the entry of rain wind and pests. For exposed fasteners avoid over tightening the fastener. Work toward the ridge.

Then stretch a string between them. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. In this video i cover measuring the roof figuring the metal th. Use your neoprene washer head screws to secure the metal to the sheathing.

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 first metal panel on the low end of the roof square to the eave. 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. If the span under your deck is 12 ft for example the purlin at the outer end of the deck should be 3 in.