Roof Sheathing Thickness For Metal Roof

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.

Roof sheathing thickness for metal roof.

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. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. The typical thickness range for sheathing is 3 8 to 3 4 inch. April 3 2017 filed under.

Most roofs will be sheathed in plywood at least 3 8 inch thick. Lets pretend the roof design details are conventional and so the roof deck sheathing will be 5 8 to 3 4. Cdx works fine in 1 2 or 5 8 thickness. Many metal roofing dealers specify minimum of 7 16 sheathing.

8d ring shank nails should be used instead. Shake and shingle panels. Panel or tile system. Osb roof decking thickness 7 16 1 2 or 5 8.

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. Malcolm i almost always use 5 8 zip sheathing on roofs and metal roofing installers have never questioned it. 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. Design depends on type of metal roof.

Loads will vary with the pitch of the roof. Never attach roof sheathing with staples. Board and batten pan and ridge panels. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Minimum roof sheathing thickness excerpt roof sheathing thickness rafter truss spacing 24 in. The time saved in humping edless 4x8 sheets up onto the roof nailing them off and creating staging areas to work from is b huge as you install the strapping purlins at 24 oc you are creating a. Sheathing should be a minimum of 19 32 inch thick. It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal.

Keep the 16 oc go with 1 2 osb and add an extra clip in each space. Exposed or hidden fasteners.