How To Install Metal Roofing Over Plywood

Be sure the larger edge is laid so that the small edge of the next panel will overlap it.

How to install metal roofing over plywood.

Try to space the screws about 12 inches apart down the entire piece of metal. Use your neoprene washer head screws to secure the metal to the sheathing. Remove all unused vents pipes and protrusions. Install the roofing screws vertically along each rib in the panel.

Applying the underlayment and the slip sheet. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. 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. Moreover try to ensure that the screws are all aligned evenly.

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. You will use metal roofing screws to secure the metal panels to the sheathing. Most metal roofs will also require underlayment as well as a slip sheet.

Inspect the plywood for damaged areas. How to install metal roofing over plywood inspect your plywood. Repair any rotted sections of plywood before installing the metal panels. 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.

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. And for any exposed fasteners try to avoid over tightening them. But it seems the condensation will affect the 2x4 strapping. Space the screws about 12 in 30 cm apart.

Sweep the plywood clean of all dirt and debris with a push broom. How to apply metal roofing over plywood step 1. Place the first screw. After the original roofing is removed what you will want to do first is look for bad pieces of.

This is not a complete install only basic install on a bungalow i.