Installing Metal Roofing On Plywood

How to install metal roofing over plywood inspect your plywood.

Installing metal roofing on plywood.

Try to space the screws about 12 inches apart down the entire piece of metal. 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. In this installation the vapor barrier is installed on the side of the insulation nearest the interior of the building. Repair any rotted sections of plywood before installing the metal panels.

Applying the underlayment and the slip sheet. Remove all unused vents pipes and protrusions. 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. If a proper roof inspection isn t done the 1x4 s could be installed over rotten plywood which means the screws could pull out.

But it seems the condensation will affect the 2x4 strapping. Sweep the plywood clean of all dirt and debris with a push broom. How to apply metal roofing over plywood step 1. Place the first screw.

And for any exposed fasteners try to avoid over tightening them. Space the screws about 12 in 30 cm apart. Use your neoprene washer head screws to secure the metal to the sheathing. Most metal roofs will also require underlayment as well as a slip sheet.

Moreover try to ensure that the screws are all aligned evenly. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. 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. 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. After the original roofing is removed what you will want to do first is look for bad pieces of. For exposed fasteners avoid over tightening the fastener. Inspect the plywood for damaged areas.