How To Install Metal Roofing Over Plywood

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.

How to install metal roofing over plywood.

Applying the underlayment and the slip sheet. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Sweep the plywood clean of all dirt and debris with a push broom. 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. In this video i m installing some metal roofing over an existing ash fault shingled roof. 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. Most metal roofs will also require underlayment as well as a slip sheet.

To watch the entire series from the beginning click here. For exposed fasteners avoid over tightening the fastener. How to install metal roofing over plywood inspect your plywood. After the original roofing is removed what you will want to do first is look for bad pieces of.

How to apply metal roofing over plywood step 1. Moreover try to ensure that the screws are all aligned evenly. And for any exposed fasteners try to avoid over tightening them. Repair any rotted sections of plywood before installing the metal panels.

Use your neoprene washer head screws to secure the metal to the sheathing. In this installation the vapor barrier is installed on the side of the insulation nearest the interior of the building. But it seems the condensation will affect the 2x4 strapping. Space the screws about 12 in 30 cm apart.

Inspect the plywood for damaged areas. Place the first screw. 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. This is not a complete install only basic install on a bungalow i.

You will use metal roofing screws to secure the metal panels to the sheathing.