Install Metal Roofing Over 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.

Install metal roofing over plywood.

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. 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. If a proper roof inspection isn t done the 1x4 s could be installed over rotten plywood which means the screws could pull out.

Place the first screw. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. Sweep the plywood clean of all dirt and debris with a push broom. How to apply metal roofing over plywood step 1.

Try to space the screws about 12 inches apart down the entire piece of metal. Repair any rotted sections of plywood before installing the metal panels. 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. Inspect the plywood for damaged areas. 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. Applying the underlayment and the slip sheet.

Metal roof installation 2 of 6 featuring edco products. Remove all unused vents pipes and protrusions. Most metal roofs will also require underlayment as well as a slip sheet. How to install metal roofing over plywood inspect your plywood.

But it seems the condensation will affect the 2x4 strapping. 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. Moreover try to ensure that the screws are all aligned evenly.

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.