How To Install Corrugated Metal Roofing Over Plywood

Ensure that the plywood deck is strong enough to withstand the added weight of the metal panels.

How to install corrugated metal roofing over plywood.

Remove the old roofing. The plywood should be clean and free of raised nail heads to provide a uniform deck structure for the metal. 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 diverts water run off away from the roof boards.

One downside is that the metal sheets have a susceptibility to denting both in installation and during hailstorms. Steadily work your way up towards the roof ridge. 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. But it seems the condensation will affect the 2x4 strapping.

A corrugated metal roof is quieter than pvc when it rains. As you place the upper panel over the panel below overlap by 1 inch. Install the first row of metal panels so that they overhang the roof by 2 to 4 inches. To secure it measure it roll it out over the plywood cut it to the dimensions of the roof with a roofing or utility knife and finally hammer it securely to the plywood with 1 2 inch roofing nails.

Metal roofing is a unique trend in roofing and this guide will walk you through the steps including how to install metal roofing over shingles. Begin installation of panels at the bottom of the roof along the eaves. Metal roofing resists rot is not susceptible to insect damage and is non combustible a boon in fire prone areas. When you decide to install corrugated metal roofing you just need to make sure that you have the right materials.

Although you can install corrugated metal roofing over shingles for the best foundation it is recommended that all the old roofing be removed. For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once. Moreover a corrugated metal roof is highly durable and will last for decades.

Corrugated metal roofing can be a convenient and relatively affordable way to provide protection without the need to install metal shingles. On top of this underlayment goes a slip which protects the material from tearing as the metal roof expands and contracts with changing weather. Install waterproof felt over the plywood to add protection against moisture.