Roof Sheathing Thickness For Metal Roof

The typical thickness range for sheathing is 3 8 to 3 4 inch.

Roof sheathing thickness for metal roof.

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. 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. Panel or tile system. Design depends on type of metal roof.

Board and batten pan and ridge panels. 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. 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.

Never attach roof sheathing with staples. Osb roof decking thickness 7 16 1 2 or 5 8. 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. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

I ve never used commodity osb on a roof but it s probably fine in 5 8 thickness and possibly in 1 2 thickness. April 3 2017 filed under. Shake and shingle panels. Cdx works fine in 1 2 or 5 8 thickness.

Minimum roof sheathing thickness excerpt roof sheathing thickness rafter truss spacing 24 in. Lets pretend the roof design details are conventional and so the roof deck sheathing will be 5 8 to 3 4. 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.

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. 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. Sheathing should be a minimum of 19 32 inch thick.

Many metal roofing dealers specify minimum of 7 16 sheathing. Keep the 16 oc go with 1 2 osb and add an extra clip in each space.