Roof Sheathing Thickness For Metal Roof

Design depends on type of metal roof.

Roof sheathing thickness for metal roof. Keep the 16 oc go with 1 2 osb and add an extra clip in each space. Cdx works fine in 1 2 or 5 8 thickness. Many metal roofing dealers specify minimum of 7 16 sheathing. 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.

8d ring shank nails should be used instead. Board and batten pan and ridge panels. Osb roof decking thickness 7 16 1 2 or 5 8. The typical thickness range for sheathing is 3 8 to 3 4 inch.

It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal. Exposed or hidden fasteners. Minimum roof sheathing thickness excerpt roof sheathing thickness rafter truss spacing 24 in. 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.

Each gauge represents a nominal decimal range. April 3 2017 filed under. A half inch thickness is considered to be standard in a lot of areas and it should work just fine considering that it s deemed okay by the roofing contractor after considering the things above. Loads will vary with the pitch of the roof.

Panel or tile system. I ve never used commodity osb on a roof but it s probably fine in 5 8 thickness and possibly in 1 2 thickness. Malcolm i almost always use 5 8 zip sheathing on roofs and metal roofing installers have never questioned it. 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.

Shake and shingle panels. 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. Never attach roof sheathing with staples. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

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.