How To Install Metal Roofing Over Plywood

Most metal roofs will also require underlayment as well as a slip sheet.

How to install metal roofing over plywood.

Remove all unused vents pipes and protrusions. For exposed fasteners avoid over tightening the fastener. To watch the entire series from the beginning click here. 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 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. 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. Sweep the plywood clean of all dirt and debris with a push broom.

In this video i m installing some metal roofing over an existing ash fault shingled roof. Applying the underlayment and the slip sheet. Inspect the plywood for damaged areas. 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.

Repair any rotted sections of plywood before installing the metal panels. Space the screws about 12 in 30 cm apart. 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. And for any exposed fasteners try to avoid over tightening them. You will use metal roofing screws to secure the metal panels to the sheathing. But it seems the condensation will affect the 2x4 strapping.

Use your neoprene washer head screws to secure the metal to the sheathing. How to apply metal roofing over plywood step 1. Moreover try to ensure that the screws are all aligned evenly. How to install metal roofing over plywood inspect your plywood.

Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are.