Flat Roof Sheathing Thickness

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.

Flat roof sheathing thickness.

The inch thick boards extend from the eaves just past the exterior walls where they butt up against the plywood roof sheathing. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather. Installing sheathing on a flat roof is much easier than working on a peaked roof.

Loads will vary with the. Plywood is typically. Get free estimates from local roofing contractors. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick.

On the upcodes website. 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. Sheathing comes in different thicknesses and what type of roof you have will help designate what type of thickness you need.

On the upcodes website. 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. Roof material then covers all. The typical thickness range for sheathing is 3 8 to 3 4 inch.

Steeper roofs tend to have thinner sheathing due to not much weight being applied to the roof while flat and low sloop roofs that are likely to gather weight from precipitation or people walking on it. Contains sections covering roof framing roof sheathing and roof ventilation. 2018 international residential code. Zip system roof assembly combines our revolutionary integrated sheathing and flashing tape or liquid flashing to provide a sealed roof for protection against moisture intrusion during construction or if high winds strip the roof covering away.

Sheathing should be a minimum of 19 32 inch thick. This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load. If your roof is more on the flatter side then it s expected to have a heavier load.