Roof Standard Size Sheathing

Sheathing should be a minimum of 19 32 inch thick.

Roof standard size sheathing.

Uplift resistance of the roof sheathing. Ommended that deformed shank nails be used throughout the entire roof. Sheathing type typically 15 32 inch or thicker panels are required in high wind areas. 8d ring shank nails should be used instead.

Use panels rated as exposure 1 or better. If 8d common nails are specified the nail diameter must be at least 0 131 inch wider than typical 8d pneumatic nails. Screws can be used for typical layout of roof sheathing panels on gable end roof typical layout of roof sheathing panels on hip roof. Comes in standard 4 by 8 foot sheets is strong durable and relatively light.

A is smooth and knot free while d the lowest quality has missing knots and cracks. The common grade of plywood for roof sheathing is cdx. 1 inch 25 4 mm 1 pound per square foot 0 0479 kn m2. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

Oriented strand board osb or plywood can be used although plywood will provide higher nail head pull through resistance. It also holds roofing nails well. Uniform load deflection limitations 1 180 of span under live load plus dead load 1 240 under live load only. Roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

The typical thickness range for sheathing is 3 8 to 3 4 inch. Most roofs will be sheathed in plywood at least 3 8 inch thick. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof.

Never attach roof sheathing with staples. As a quick primer in plywood each side is rated from a to d.