Metal Roof On Plywood Or Osb

Let s take a look at the most common types of metal roofs for houses.

Metal roof on plywood or osb.

Overall plywood is a little bit better for roofing. Each material has its similarities and differences. The contractor can choose an oriented standard board osb or plywood to create the decking of the roof. Ensure that the plywood deck is strong enough to withstand the added weight of the metal panels.

While metal roofing doesn t require plywood underlayment there are circumstances in which you may wish to install plywood to anticipate future roofing needs or to offer additional soundproofing. Oriented strand board commonly referred to as osb is a type of engineered lumber similar to particle board formed by adding adhesives and then compressing layers of wood strands. April 3 2017 filed under. Osb vs plywood screw holding.

Osb is made of small and fairly rectangular shaped wood chips from small resinous trees which are bonded into a panel form with wax and synthetic resin. Even though the wood is porous it is more natural and it can dry quickly. The only reason to put osb on a roof would be in the case of a very narrow very long very tall building with high wind loads ones which would exceed the wind shear carrying capacity of the steel. Metal roofing requires a solid substrate.

Mike the pole barn guru. An affordable option and easier to lay than shingles tin is the most commonly used type of metal roofing. Osb is widely used as roof decking material. Metal roofing roofing answers roofing installation roofing materials.

Plywood on the other hand is made with thin sheets of wood that have been cut from a spinning log then glued together with the grain laid out in alternating directions to maximise strength. Then the top of all your purlins once osb under metal roof panels is placed will be in the same plane and the roof steel will lay flat. 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. This is why plywood is considered as the better option for roofing.

Modern metal roofs are expected to last 30 years or longer. Here are some things to consider when choosing your decking material to install on a roof. Think of roll formed steel roofing and siding as performing like a very strong very thin plywood and you will have a better grasp of how it performs. In order to avoid a hump at the transition from two layers of materials to one the notation on the building plans advises to lower the roof purlins in these areas by 7 16.