Roof Sheathing Requirements

Create a system of spaced sheathing above the solid sheathing using vertical and horizontal battens.

Roof sheathing requirements.

Use panels rated as exposure 1 or better. Or less roof fastening zone wind main sheathing to gable overhang velocity roof end wall framingg eaves 3 second panel 123 2 3 2 3. Loads will vary with the. At exposed roof overhangs the sheathing must be rated for exposure to the weather.

Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span. Refer to f rs 1 f rs 2 and f rs 3 documentation. Roof sheathing material must be coordinated with the roofing itself since each type of roofing has special requirements. Oriented strand board osb or plywood can be used although plywood will provide higher nail head pull through resistance.

At intermediate supports fasten panels 12 inches on center. 1 photo per each panel of new replaced sheathing type and thickness. Use a breathable underlayment applied over the sheathing. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood.

Maximum 19 percent moisture content. Sheathing type typically 15 32 inch or thicker panels are required in high wind areas. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. The everyday sheathing used on the body of a roof is not rated for weather exposure so when exposed eaves and or rakes occur at the.

Roof sheathing fastening schedulea b c d e 8d common 0 131 x 2 1 2 inches or ring shank 0 135 x 2 1 2 inches except where noted for exposure b enclosed buildings roof framing spaced 24 inches o c. In high wind areas more fasteners may be required. If roof sheathing is damaged verify new replaced roof deck thickness verify new replaced roof deck meets fortified minimum thickness requirements. Secure roof sheathing panels to the roof framing with 8d common nails spaced six inches on center at the edges and twelve inches on center at intermediate supports.

Several factors must be considered when determining appropriate roof sheathing thickness such as the. Required sheathing thickness for roofing important factors. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.