The Use Of Concrete Form Boards For Roof Sheathing

Sheathing is the board or panel material used in floor wall and roof assemblies of both residential and commercial construction.

The use of concrete form boards for roof sheathing.

It is normally 1 inch 3 4 inch dressed tongue and groove lumber or 3 4 inch plywood. 1 by 8 boards commonly used on the eave and rake overhangs when soffits will not be installed rather than as roof sheathing. The inch thick boards extend from the eaves just past the exterior walls where they butt up against the plywood roof sheathing. Sheathing sheathing forms the surface of the concrete.

Securock roof boards are a portfolio of high performance roof boards to meet the needs of your low slope commercial roofing project. There are several types of sheathing each having a specific function based on its application. It spans the rafters to support the roofing and in the case of panel sheathing such as plywood or osb it acts as a diaphragm with the walls to resist horizontal loads. The typical thickness range for sheathing is 3 8 to 3 4 inch.

It should be smooth especially if the finished surface is to be exposed. Sheathing should be a minimum of 19 32 inch thick. The boards are more attractive when viewed from underneath than rough plywood. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Oriented strand board isn t plywood nor is it a type of particleboard fiberboard or wafer board and although it is a newcomer to a plywood dominated market its use for exterior sheathing is. The most basic function of sheathing in any application is to form a surface onto which other materials can be applied. When i built my house years ago i poured my basement walls using my subfloor as forms and hundreds of feet of 2x4 s for the walers it worked real nice any tile was layed over concrete board also i poured my garage foundation using my 5 8 roof sheathing for its forms. Never attach roof sheathing with staples.

Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof. Plywood particle board or wafer board roof sheathing is most commonly used being low in cost and easy to apply. Tongue and groove lumber or plywood gives a. If you have chosen to use a rigid roofing metal wood shakes or shingles tile etc you can use 1 x 4 slats instead.

Concrete is plastic when placed in the form so sheathing should be watertight.