Roof Sheathing Requirements

If roof sheathing is damaged verify new replaced roof deck thickness verify new replaced roof deck meets fortified minimum thickness requirements.

Roof sheathing 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. Sheathing type typically 15 32 inch or thicker panels are required in high wind areas. 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.

Fasten roof sheathing panels properly fasten panels with a minimum of 8d common 0 131 inch by 2 1 2 inch nails spaced a maximum of 6 inches on center at supported panel ends and edges. 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. Roof sheathing shall be structural wood panels plywood osb with a minimum five eighths inch thickness grade stamped for use and span. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. Use panels rated as exposure 1 or better. 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. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood.

At exposed roof overhangs the sheathing must be rated for exposure to the weather. Loads will vary with the. Roof sheathing material must be coordinated with the roofing itself since each type of roofing has special requirements. Maximum 19 percent moisture content.

Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Create a system of spaced sheathing above the solid sheathing using vertical and horizontal battens. 1 photo per each panel of new replaced sheathing type and thickness. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

In high wind areas more fasteners may be required. Refer to f rs 1 f rs 2 and f rs 3 documentation. Use a breathable underlayment applied over the sheathing.