Roof Sheathing Thickness For Metal 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.

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. 8d ring shank nails should be used instead. Lets pretend the roof design details are conventional and so the roof deck sheathing will be 5 8 to 3 4. Keep the 16 oc go with 1 2 osb and add an extra clip in each space.

Design depends on type of metal roof. Shake and shingle panels. Osb roof decking thickness 7 16 1 2 or 5 8. Minimum roof sheathing thickness excerpt roof sheathing thickness rafter truss spacing 24 in.

Loads will vary with the pitch of the roof. 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. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

Board and batten pan and ridge panels. Each gauge represents a nominal decimal range. Sheathing should be a minimum of 19 32 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.

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. Many metal roofing dealers specify minimum of 7 16 sheathing. Never attach roof sheathing with staples.

It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal. 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. April 3 2017 filed under. Panel or tile system.

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. 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.