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 install metal roofing over plywood.

Use your neoprene washer head screws to secure the metal to the sheathing. Applying the underlayment and the slip sheet. Repair any rotted sections of plywood before installing the metal panels. And for any exposed fasteners try to avoid over tightening them.

Place the first screw. Try to space the screws about 12 inches apart down the entire piece of metal. Moreover try to ensure that the screws are all aligned evenly. Most metal roofs will also require underlayment as well as a slip sheet.

How to apply metal roofing over plywood step 1. 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. This is not a complete install only basic install on a bungalow i.

But it seems the condensation will affect the 2x4 strapping. 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. 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. You will use metal roofing screws to secure the metal panels to the sheathing. Sweep the plywood clean of all dirt and debris with a push broom. Install the roofing screws vertically along each rib in the panel.

Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Remove all unused vents pipes and protrusions. In this installation the vapor barrier is installed on the side of the insulation nearest the interior of the building. For exposed fasteners avoid over tightening the fastener.

After the original roofing is removed what you will want to do first is look for bad pieces of.