Osb Flat Roof Deck

With edge support and the same snow load 3 8 inch osb can be used.

Osb flat roof deck.

The material used for the roof deck must be moisture resistant and will usually be plywood osb or timber boards although concrete and woodwool slab or profiled metal can also be used. Panel selection should be made according to the category of use given in table 1 below. Osb flat roof decks should be designed in accordance with bs 6229. 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.

Osb used for flat roof decking should be type osb 3 or osb 4 conforming to bs en 300. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb. Osb is widely used as roof decking material. When designing a roof using smartply osb roof panels a deemed to satisfy approach may be employed using tables and design guidance for domestic roof applications given in bs 8103 3.

Thicknesses range from 5 16 to 3 4 inch and the proper one to use. Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. Ordinary chipboard is not recommended as it may absorb moisture when damp and lose its structural integrity. Thickness and fixing recommendations are similar to those for plywood.