How Do You Estimate Roofing Materials

This metal strip which goes beneath the underlayment protects the edge of the roof from rot.

How do you estimate roofing materials.

A square simply refers to a 10 x 10 square of roofing. Once you work through the basic triangle we will review a typical roof and how to apply some simple math to calculate how much material you will need for a roof used in our hypothetical example. Simply input the surface area of the roof choose from one of the available options and you will get your first roofing estimate. Estimate the cost to install a new roof with the help of our newly revamped roofing calculator for homes.

If this distance measures 4 inches you have a 4 in 12 pitch. While it is possible to estimate the amount of necessary materials using only the total roof area measurement as can be seen from the table depending how large the pitch of the roof the actual area of the roof can differ by up to 2 236 from the measured total area at a pitch of 24 12. Pitch measurement method 1. At 4 nails per field shingle that s about 320 nails per square.

Estimating other materials 1. Gauge the amount of hip and ridge. Measure for drip edge. Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material.

Whether you are interested in asphalt shingles cedar shingles clay tiles natural slate or metal roofing our calculator will instantly give you the total cost of a new roof installed based on your home s ground dimensions and the type of a roofing system you are interested in. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. The length l times the height h of a triangle is twice its area a2. To find the squares divide the overall roof area by 100 and then round up.

Roofing contractors estimate projects and materials by the square so it is crucial to find this measurement to accurately estimate the amount of material needed. With an online roofing calculator you will usually be able to drill down a bit deeper in order to see a fine grained cost breakout on a sq ft basis. 8 inches and you have an 8 in 12 pitch. Estimate how many roofing nails you ll need.

This is simply 100 square feet of roof. But keep in mind that materials typically only account for 40 of the total cost of square roofing. As such while it can be cumbersome measuring the area and pitch of each part of the roof and multiplying by the corresponding correction factor will result in the most accurate estimate of necessary.