Flat Roof Overhang Size

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

Flat roof overhang size. Never attach roof sheathing with staples. Input the rafter span on the flat eave overhang and pitch of the roof. This profile of drip edge is shaped like a t with a lower flange at the bottom. As an example if your overhang is 12 inches you ll add 2 feet to the overall length and 2 feet to the overall width of the house.

Check that your footage measurements are within this range so you can start off on the right foot. 8d ring shank nails should be used instead. Two feet is the general maximum length for a typical roof overhang. Click the button to calculate the stock size needed for this job.

Rafter stock size calculator. You will need to express this size in terms of square feet. This will keep rain away from your shed. Measure your house at ground level then add in the roof s overhang for greater accuracy.

A shed overhang is an easy and effective way to protect your shed. Roof overhangs can extend farther than 2 feet but beyond this length they begin to lose structural integrity and require external supports. The typical thickness range for sheathing is 3 8 to 3 4 inch. That said overhangs can extend as far as 2 without the need for external supports.

Sheathing should be a minimum of 19 32 inch thick. The length of the overhang itself commonly ranges from 2 to 5 inches. You can add 3 to 5 inches to the top. However the suggested width of an overhang is between 12 and 18 for eaves and no more than 8 for rakes.

This calculator is to be used as an estimating tool only. Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure.