Installing Metal Roofing On Plywood

Place the first screw.

Installing metal roofing on plywood.

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. Most metal roofs will also require underlayment as well as a slip sheet. After the original roofing is removed what you will want to do first is look for bad pieces of.

But it seems the condensation will affect the 2x4 strapping. Inspect the plywood for damaged areas. 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. 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.

In this installation the vapor barrier is installed on the side of the insulation nearest the interior of the building. Sweep the plywood clean of all dirt and debris with a push broom. If a proper roof inspection isn t done the 1x4 s could be installed over rotten plywood which means the screws could pull out. Applying the underlayment and the slip sheet.

Try to space the screws about 12 inches apart down the entire piece of metal. 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. 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. For exposed fasteners avoid over tightening the fastener. You will use metal roofing screws to secure the metal panels to the sheathing. 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.

How to apply metal roofing over plywood step 1. Remove all unused vents pipes and protrusions. Use your neoprene washer head screws to secure the metal to the sheathing. And for any exposed fasteners try to avoid over tightening them.