How To Install Metal Roofing Over Plywood

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How to 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. How to apply metal roofing over plywood step 1. Sweep the plywood clean of all dirt and debris with a push broom. Most metal roofs will also require underlayment as well as a slip sheet.

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. You will use metal roofing screws to secure the metal panels to the sheathing. Repair any rotted sections of plywood before installing the metal panels. Use your neoprene washer head screws to secure the metal to the sheathing.

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. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Inspect the plywood for damaged areas. Install the roofing screws vertically along each rib in the panel.

For exposed fasteners avoid over tightening the fastener. In this installation the vapor barrier is installed on the side of the insulation nearest the interior of the building. Try to space the screws about 12 inches apart down the entire piece of metal. Space the screws about 12 in 30 cm apart.

And for any exposed fasteners try to avoid over tightening them. Place the first screw. How to install metal roofing over plywood inspect your plywood. This is not a complete install only basic install on a bungalow i.

After the original roofing is removed what you will want to do first is look for bad pieces of. Moreover try to ensure that the screws are all aligned evenly. Remove all unused vents pipes and protrusions. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are.

But it seems the condensation will affect the 2x4 strapping.