Sheathing Roof Trusses

Rafters run from the peak of the roof.

Sheathing roof trusses.

In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood. Roof sheathing is a lot more than just flat panels onto which shingles are attached. Nails size 8b should be installed every 6 inches on edges and every 12 inches in the center area. Roof sheathing or decking is one of those elements.

These trusses are positioned on the top plate of the endwall so the entire bottom chord is supported by the wall. Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof. There are a few different terms for roof sheathing such as roof decking but sheathing is one of the more popular terms.

A structure s roof truss spacing can vary from every 12 to 24 inches. Start the sheathing at the eaves and work your way up to 1 inch from the peak. End trusses close in the end of a building and provide a nailing surface for the upper end wall or rigid sheathing. The roof s sheathing helps to keep the roof trusses or rafters properly spaced and is the strength that holds.

Most houses contain a weak link in the connection of the roof sheathing to the rafters or roof trusses making them vulnerable to loss of roof sheathing in severe winds but solutions to this. Install sheathing perpendicular to roof trusses one slope at a time. The number of nails needed for a roof varies on multiple factors such as board face width length and roof truss spacing. The minimum plywood for roofing.

Boards used for sheathing range from those with a 4 inch face to 48 inch long plywood sheets. The skeleton of a roof is formed with rafters or trusses generally spaced 16 inches or 24 inches apart from the center of one rafter to the center of the next.