Osb Flat Roof

Oriented strand board or osb roof sheathing is a preferred material for roofing because of its strength and low weight.

Osb flat roof.

Lay sheets in rows with the long edge horizontal to the roof bottom. Sufficient thickness 18mml. With edge support and the same snow load 3 8 inch osb can be used. How to correctly install plywood or osb roof sheathing.

Osb a sterling board. Alternatively osb is created from wood chips resin and adhesive that is baked and formed into the shape of a sheet of plywood. 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. The minimum osb panel size is 24 inches in any direction and each sheet end must rest on a rafter.

Osb roof panels should always be installed with the grade stamp facing into the attic and the screened surface with the nail guide lines facing up. Impervious to any waters ingress. The usual recommendation is that osb 3 or osb 4 bs en 300 should be used in flat roofs. Provide a 1 8 inch gap.

Avoid the errors described when installing this roof sheathing. It is extremely resistant to moisture. Installed correctly allowing falls to roof using per furring. Adequate roof membrane showing solid thickness mastic asphalt 20mml integrity using grade taken into consideration.

Thicknesses range from 5 16 to 3 4 inch and the proper one to use. However when it is penetrated by water it takes a very long time to finally dry out compared to cdx plywood. Osb has almost the same application and usefulness as the plywood it is made from wafers of timber rather than full sheets of veneer. Types of sheathing typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

Sheets of 7 16 inch thick with no edge support can be used in an area where the snow load is 30 pounds per square foot. Ensure that the product has been duly certified by the british board of agrément bba before it is used for your project. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones.