Installing Metal Roofing On Plywood

How to install metal roofing over plywood inspect your plywood.

Installing metal roofing on plywood.

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. Inspect the plywood for damaged areas. Repair any rotted sections of plywood before installing the metal panels. But it seems the condensation will affect the 2x4 strapping.

Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof that can t be done the other two ways. Most metal roofs will also require underlayment as well as a slip sheet. Sweep the plywood clean of all dirt and debris with a push broom. Place the first screw.

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. After the original roofing is removed what you will want to do first is look for bad pieces of. And for any exposed fasteners try to avoid over tightening them. Remove all unused vents pipes and protrusions.

For exposed fasteners avoid over tightening the fastener. Space the screws about 12 in 30 cm apart. 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.

Try to space the screws about 12 inches apart down the entire piece of metal. How to apply metal roofing over plywood step 1. If a proper roof inspection isn t done the 1x4 s could be installed over rotten plywood which means the screws could pull out. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are.

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. Moreover try to ensure that the screws are all aligned evenly. Install the roofing screws vertically along each rib in the panel. You will use metal roofing screws to secure the metal panels to the sheathing.