Us Roof Thickness

What size plywood for the roof.

Us roof thickness.

Approximate thickness in millimeters. It s important for you as a homeowner to know about the gauge thickness of a metal roof so you can select the best one for yourself. Approximate thickness in fractions of an inch. A 1 2 sheet is actually 15 32 thick.

Loads will vary with the. That s considered to be the minimum. Other types of shingles including number 1 wood cedar shake and tile are thicker although the thickness depends upon the individual brand of shingles you select. Roof sheathing thickness unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick.

The same floor if framed with 2 by 12s will be 13 1 4 inches thick. Because the actual thickness may vary measuring the plywood is the only accurate way to determine its thickness. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads. Weight per square foot in ounces avoirdupois.

Depends on the roof load see table r503 2 1 1 1 7 construction exceeding the minimum requirements6 osb or plywood is the minimum you can use without edge support. Weight per square foot in kilograms. When this is the case experts recommend a 5 8 inch thick sheet. Minimum thickness most roofs will be sheathed in plywood at least 3 8 inch thick.

Some departments do not have the man power to do roof sheathing inspection inspectors can not see everything and assume that the builder knows enough to do some things right. Weight per square meter in kilograms. Weight per square meter in pounds. Total thickness when accounting for joist width subflooring flooring and standard ceiling drywall a floor framed with 2 by 10s will be very close to 11 1 4 inches thick.

Weight per square foot in pounds avoirdupois. 22 gauge is the thickest while 29 gauge is the thinnest. Standard asphalt shingles add very little thickness to the roof because a standard three tab shingle is about 3 16 inch thick. Manufacturers in the united states use gauge to express the thickness of metal roof panels.

Plywood is often sold in 1 4 1 2 or 3 4 nominal thicknesses but the actual thickness is often 1 32 thinner. The problem with metal roofing gauge is that there is a wide range of tolerances. 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. Keep in mind that the load of the roof still plays a role in the plywood thickness.

Approximate thickness in decimal parts of an inch. A flatter roof with rafters farther apart may need a thickness of up to inch.