Flat Roof Sheathing Thickness

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.

Flat roof sheathing thickness.

Plywood is typically. 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. 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. The sheathing is the base you lay over the rafters that holds the roofing felt and shingles.

Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. Loads will vary with the. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. That s considered to be the minimum.

If your roof is more on the flatter side then it s expected to have a heavier load. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. As an example of what you can find in chapter 8 of the 2018 irc see. Contains sections covering roof framing roof sheathing and roof ventilation.

Installing sheathing on a flat roof is much easier than working on a peaked roof. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather. 2018 international residential code. Get free estimates from local roofing contractors.

Roof material then covers all. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. On the upcodes website. Sheathing comes in different thicknesses and what type of roof you have will help designate what type of thickness you need.

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. The inch thick boards extend from the eaves just past the exterior walls where they butt up against the plywood roof sheathing. Sheathing should be a minimum of 19 32 inch thick.