Install Metal Roofing Over Plywood

Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof that can t be done the other two ways.

Install metal roofing over plywood.

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

And for any exposed fasteners try to avoid over tightening them. If a proper roof inspection isn t done the 1x4 s could be installed over rotten plywood which means the screws could pull out. Most metal roofs will also require underlayment as well as a slip sheet. Applying the underlayment and the slip sheet.

Try to space the screws about 12 inches apart down the entire piece of metal. For exposed fasteners avoid over tightening the fastener. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Repair any rotted sections of plywood before installing the metal panels.

Remove all unused vents pipes and protrusions. But it seems the condensation will affect the 2x4 strapping. How to apply metal roofing over plywood step 1. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are.

Sweep the plywood clean of all dirt and debris with a push broom. Moreover try to ensure that the screws are all aligned evenly. Inspect the plywood for damaged areas. Place the first screw.

Install the roofing screws vertically along each rib in the panel. 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. Metal roof installation 2 of 6 featuring edco products. You will use metal roofing screws to secure the metal panels to the sheathing.

Use your neoprene washer head screws to secure the metal to the sheathing.