Flat Roof Sheathing Thickness

Contains sections covering roof framing roof sheathing and roof ventilation.

Flat roof sheathing thickness.

Roof material then covers all. Sheathing should be a minimum of 19 32 inch thick. On the upcodes website. 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.

Get free estimates from local roofing contractors. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. If your roof is more on the flatter side then it s expected to have a heavier load. The sheathing is the base you lay over the rafters that holds the roofing felt and shingles.

A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather. On the upcodes website. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

Plywood is typically. As an example of what you can find in chapter 8 of the 2018 irc see. 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 typical thickness range for sheathing is 3 8 to 3 4 inch.

Sheathing comes in different thicknesses and what type of roof you have will help designate what type of thickness you need. 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. Loads will vary with the. 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.

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. The inch thick boards extend from the eaves just past the exterior walls where they butt up against the plywood roof sheathing.