How To Install Metal Roofing Over Plywood

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

How to install metal roofing over plywood.

Place the first screw. I was planning on putting plywood over the rafters and cross the rafters with a 2 x4 every 16 to secure the metal roof to. How to apply metal roofing over plywood step 1. Moreover try to ensure that the screws are all aligned evenly.

How to install metal roofing over plywood inspect your plywood. You will use metal roofing screws to secure the metal panels to the sheathing. Space the screws about 12 in 30 cm apart. For exposed fasteners avoid over tightening the fastener.

Most metal roofs will also require underlayment as well as a slip sheet. Repair any rotted sections of plywood before installing the metal panels. 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. In this installation the vapor barrier is installed on the side of the insulation nearest the interior of the building.

Try to space the screws about 12 inches apart down the entire piece of metal. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. But it seems the condensation will affect the 2x4 strapping. In this video i m installing some metal roofing over an existing ash fault shingled roof.

To watch the entire series from the beginning click here. Applying the underlayment and the slip sheet. When using plywood nail it directly to the purlins and screw the metal roofing panels through the plywood into the purlins as instructed by the manufacturer. Use your neoprene washer head screws to secure the metal to the sheathing.

In reading online it seems wise to install a vapor barrier over the plywood to prevent condensation from getting adsorbed into the plywood from the steel roof. And for any exposed fasteners try to avoid over tightening them. Sweep the plywood clean of all dirt and debris with a push broom. Inspect the plywood for damaged areas.

This is not a complete install only basic install on a bungalow i.