Installing Metal Roof On Plywood

In many cases it makes sense to remove an old or dilapidated roof and install a metal roof that is better able to withstand the elements.

Installing metal roof on 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. Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once. Although you can install corrugated metal roofing over shingles for the best foundation it is recommended that all the old roofing be removed. But it seems the condensation will affect the 2x4 strapping.

Most metal roof companies recommend installing felt paper on roof sheathing before you install the metal roofing. 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. An affordable option and easier to lay than shingles tin is the most commonly used type of metal roofing. On top of this underlayment goes a slip which protects the material from tearing as the metal roof expands and contracts with changing weather.

Ensure that the plywood deck is strong enough to withstand the added weight of the metal panels. Remove the old roofing. For many applications a layer of plywood underneath your metal roofing is an unnecessary expense. Metal roofing panels rated for architectural use attached to purlins horizontal pieces of wood or metal fastened to roofing trusses are structurally sound when installed according to your roofing manufacturer s instructions and local building codes.

If you are installing metal roofing onto plywood it is even more imperative that you have a solid base to place the metal roofing on. If you ensure the plywood is in good condition and well protected before placing the metal roofing you can expect the average life expectancy of your metal on plywood roof to be 40 70 years. The good news is that there are many different solutions in terms of installing metal roofing panels including tin aluminum and steel. Whether you are looking to install a metal roof on a shed or a house it s important to know the difference in the various types of metal roofs available.

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. Rotted sagging areas in your roof s plywood decking should be replaced prior to installing metal panels in order to prevent costly repairs in the future. Let s take a look at the most common types of metal roofs for houses. The asphalt in the felt paper is waterproof and does a great job of protecting the.