Osb 2 Or 3 For Shed Roof

Saturday 12th january 2013.

Osb 2 or 3 for shed roof.

For shed construction there are two commonly used grades of osb. I m thinking about putting another layer of osb on top of the insulation before i finally lay a single sheet epdm on top. The topic replacement shed roof osb or ply is closed to new replies. Apple podcasts google podcasts android by email rss.

2 is ok but 3 better you don t say what thickness the floor needs to have air circualtion. The lower the slope the more weight for snow load but less wind force. Even though plywood is more expensive and osb stronger my recommendation for a shed roof is 5 8 or 3 4 construction grade exterior rated cdx t g plywood. Up here in bonny scotland i ve seen many a roof with osb.

Osb comes in 4 by 8 foot sheets as does plywood but the manufacturing process allows the production of longer and wider ones. Singletrack issue 132 is out now. On top of the osb i was going to lay floating 25mm insulation then some engineered wood laminate which i had surplus. My shed is osb with a layer of torch on roof felt been good for 10 years.

Typical markings on osb panel. My plan is for a warm roof so i m going to lay the 18mm osb3 then a vapour barrier followed by 100mm celotex insulation boards. Hi folks building a 7x4m shed to get the kids and xbox out of the house. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

Osb is made of chips of softwood glued together in a semi random pattern. Typically 3 4 18mm for floors and 3 8 9mm for walls and 1 2 11mm roof. Thick osb does a fine job sheathing the walls and roof of a shed it is a bottom of the barrel sheet material for several reasons. The higher the slope the more quickly the snow and rain will be shed but also the greater the wind force.

With edge support and the same snow load 3 8 inch osb can be used. Direction of text should run in direction of span. The two grades of board look very similar and can only be distinguished visually by markings which are sprayed on to the board. And while seven sixteenth in.

Most osb suppliers have a load span table giving a guide to the spacing of timbers for different thicknesses. As with plywood osb typically comes in 4 ft. Thicknesses range from 5 16 to 3 4 inch and the proper. Also make sure that you get your supporting timbers at the correct spacing.

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.