Flat Roof Decking Thickness

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Flat roof decking thickness.

Osb roof decking thickness 7 16 1 2 or 5 8 if were using osb we get 9 16 we dont worry about getting both 7 16 and 9 16 for walls then the roof we just get all of the same. Tuff clad pvc metal flashing. Keep in mind that the load of the roof still plays a role in the plywood thickness. Another issue that many people encounter is what size plywood the roof may need.

Waterproof decking for flat roof decks need to be walkable and nice to look at. When using this type of deck in conjunction with bonded vapour control layers it will be necessary to first install a random nailed isolating layer prior to the installation of the main roofing system to cover the joints between adjacent boards. A flatter roof with rafters farther apart may need a thickness of up to inch. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick.

The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Sheathing should be a minimum of 19 32 inch thick. 8am to 4pm pst.

What size plywood for the roof. Call toll free 1 877 860 9333. Here s how tufdek waterproof decking stands out on a flat roof deck. The typical thickness range for sheathing is 3 8 to 3 4 inch.

8d ring shank nails should be used instead. This way no worrying about grabbing scraps to fill in small spots and not having the correct thickness. Sheathing sizes osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures.