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.

How to apply metal roofing over plywood step 1. Inspect the plywood for damaged areas. Moreover try to ensure that the screws are all aligned evenly. 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.

But it seems the condensation will affect the 2x4 strapping. Try to space the screws about 12 inches apart down the entire piece of metal. Applying the underlayment and the slip sheet. Place the first screw.

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. In this installation the vapor barrier is installed on the side of the insulation nearest the interior of the building. After the original roofing is removed what you will want to do first is look for bad pieces of.

In this video i m installing some metal roofing over an existing ash fault shingled roof. Sweep the plywood clean of all dirt and debris with a push broom. To watch the entire series from the beginning click here. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are.

Repair any rotted sections of plywood before installing the metal panels. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. For exposed fasteners avoid over tightening the fastener. And for any exposed fasteners try to avoid over tightening them.

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. Space the screws about 12 in 30 cm apart. Install the roofing screws vertically along each rib in the panel.

Remove all unused vents pipes and protrusions.