How To Install Metal Roofing Over Plywood

In this installation the vapor barrier is installed on the side of the insulation nearest the interior of the building.

How to install metal roofing over plywood. Most metal roofs will also require underlayment as well as a slip sheet. 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. But it seems the condensation will affect the 2x4 strapping. You will use metal roofing screws to secure the metal panels to the sheathing.

Inspect the plywood for damaged areas. To watch the entire series from the beginning click here. Install the roofing screws vertically along each rib in the panel. And for any exposed fasteners try to avoid over tightening them.

In this video i m installing some metal roofing over an existing ash fault shingled roof. How to install metal roofing over plywood inspect your plywood. 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. Be sure the larger edge is laid so that the small edge of the next panel will overlap it.

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. Place the first screw. After the original roofing is removed what you will want to do first is look for bad pieces of. Try to space the screws about 12 inches apart down the entire piece of metal.

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. Remove all unused vents pipes and protrusions. Moreover try to ensure that the screws are all aligned evenly. Applying the underlayment and the 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. This is not a complete install only basic install on a bungalow i.

How to apply metal roofing over plywood step 1.