Sheathing Roof Trusses

The minimum plywood for roofing.

Sheathing roof trusses. Any weight imposed on the end truss is directly transferred to the endwall which transfers the weight to the. 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. To stabilize the rafters support the roofing material and hold the entire roof together roof sheathing is installed. In the u s roof sheathing is almost always composed of wood usually osb oriented strand board or plywood.

End trusses close in the end of a building and provide a nailing surface for the upper end wall or rigid sheathing. Roof sheathing or decking is one of those elements. A structure s roof truss spacing can vary from every 12 to 24 inches. Nails size 8b should be installed every 6 inches on edges and every 12 inches in the center area.

Roof sheathing is a lot more than just flat panels onto which shingles are attached. Rafters run from the peak of the roof. The roof s sheathing helps to keep the roof trusses or rafters properly spaced and is the strength that holds. Osb is lightweight relatively inexpensive and strong enough to resist bending or breaking should someone walk on the roof.

The number of nails needed for a roof varies on multiple factors such as board face width length and roof truss spacing. 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. The trusses and beams of the roof give the roof its initial pitch and structure and then the sheathing is applied so the actual underlayment and roof covering can be applied.

Install sheathing perpendicular to roof trusses one slope at a time. Boards used for sheathing range from those with a 4 inch face to 48 inch long plywood sheets.