Roof Sheathing Thickness For Metal Roof

Exposed or hidden fasteners.

Roof sheathing thickness for metal roof.

Many metal roofing dealers specify minimum of 7 16 sheathing. It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. 140 wind speed mph 150 mph 160 mph minimum sheathing thickness inches exposure b 7 16 24 16 15 32 32 16 19 32 40 20 minimum sheathing thickness inches panel span rating exposure c 19 32from asce 7 40 20 19 32 40 20 19 32 40 20.

Malcolm i almost always use 5 8 zip sheathing on roofs and metal roofing installers have never questioned it. Each gauge represents a nominal decimal range. Panel or tile system. Keep the 16 oc go with 1 2 osb and add an extra clip in each space.

The typical thickness range for sheathing is 3 8 to 3 4 inch. Manufacturers express the thickness of metal panels as their gauge with 22 gauge being the thickest and 29 gauge the thinnest of traditionally sold metal roof and wall panels. Loads will vary with the pitch of the roof. I ve never used commodity osb on a roof but it s probably fine in 5 8 thickness and possibly in 1 2 thickness.

Board and batten pan and ridge panels. Sheathing should be a minimum of 19 32 inch thick. Lets pretend the roof design details are conventional and so the roof deck sheathing will be 5 8 to 3 4. Metal roofing roofing answers roofing installation roofing materials oriented strand board commonly referred to as osb is a type of engineered lumber similar to particle board formed by adding adhesives and then compressing layers of wood strands.

Minimum roof sheathing thickness excerpt roof sheathing thickness rafter truss spacing 24 in. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. April 3 2017 filed under. Most roofs will be sheathed in plywood at least 3 8 inch thick.

And you b don tneed to sheath the roof the difference in price between a 4x8 sheet of osb or ply and 8 pieces of 1x4x8 for exmple is big. Cdx works fine in 1 2 or 5 8 thickness. Design depends on type of metal roof. Shake and shingle panels.

Osb roof decking thickness 7 16 1 2 or 5 8. Never attach roof sheathing with staples.