Installing Metal Roofing On Plywood

After the original roofing is removed what you will want to do first is look for bad pieces of.

Installing metal roofing on plywood.

Install the roofing screws vertically along each rib in the panel. Try to space the screws about 12 inches apart down the entire piece of metal. 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. Be sure the larger edge is laid so that the small edge of the next panel will overlap it.

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. Moreover try to ensure that the screws are all aligned evenly. If a proper roof inspection isn t done the 1x4 s could be installed over rotten plywood which means the screws could pull out. Most metal roofs will also require underlayment as well as a slip sheet.

For exposed fasteners avoid over tightening the fastener. Repair any rotted sections of plywood before installing the metal panels. Use your neoprene washer head screws to secure the metal 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.

Inspect the plywood for damaged areas. Space the screws about 12 in 30 cm apart. But it seems the condensation will affect the 2x4 strapping. 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.

Applying the underlayment and the slip sheet. How to install metal roofing over plywood inspect your plywood. And for any exposed fasteners try to avoid over tightening them. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are.

Place the first screw. Remove all unused vents pipes and protrusions. In this installation the vapor barrier is installed on the side of the insulation nearest the interior of the building. How to apply metal roofing over plywood step 1.