How To Size A Roof For Shingles

First you must measure the length and width of each plane of the roof including dormers.

How to size a roof for shingles.

When installing asphalt shingles on felt only to any grade decking you should use 1 inch long roofing nails. To find the squares divide the overall roof area by 100 and then round up. Lay the first row of shingles directly covering the narrow starter row. Cut six inches off the length of the first starter shingle nailed on then use the rest of them full size.

A square simply refers to a 10 x 10 square of roofing. Then each measurement is recorded on the diagram applicable to that roof surface. Stow these items in a shoulder or hip pack while. Measuring the length and width of each plane by hand 1.

Required measurements include the following. Next to calculate the square footage of each rectangular plane multiply the length by the width. For instance if the roof is 1550 square feet then it is 16 squares. To figure out your roof s area a simple geometry can be used.

Draw an overhead view of your roof. How to measure a roof for shingles step by step the process of accurately measuring a roof involves first making a diagram of the roof to show the basic shapes of each roof plain and how they relate to one another. To calculate a rough estimate follow these steps. If the planes aren t rectangles this may be complicated.

This is simply 100 square feet of roof. Snap a horizontal chalk line over the starting row to use as a guide. Climb a ladder with a notepad a pencil and a measuring tape. Below there is a simple triangle and the math used to work out.

The more common roof thickness is 3 4 inch decking.