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.

Osb flat roof deck.

Osb flat roof decks should be designed in accordance with bs 6229. Osb is widely used as roof decking material. Panel selection should be made according to the category of use given in table 1 below. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

Thickness and fixing recommendations are similar to those for plywood. 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. A homeowner recently wrote and asked me the following regarding osb roof decking. Ordinary chipboard is not recommended as it may absorb moisture when damp and lose its structural integrity.

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. 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.