It’s time for your house to get a new roof, and you’d like to know how many shingles you’ll need. This is something that only experienced roofing contractors can do. However, it’s possible that you’d like to learn more about yourself. It’s not always simple to measure a roof. For an accurate calculation, you’ll need to know a few simple things.Learn more about us at Peabody Roofing Association
Contractors who work in the roofing industry have their own jargon.
The first thing you should note is that shingles are sold in “squares” by roofing contractors. A square is described as a 10×10 foot or 100 square foot area. Typically, one square of simple three tab shingles will require three bundles of shingles. Architectural shingles have become heavier and thicker in recent years. It will take four or five bundles to make a square if you use these.
The first step is to draw a picture of your roof from above, looking straight down. Even if you don’t achieve the exact look, a simple drawing will suffice. The total of your measurements will equal the number of squares needed.
Most roofs aren’t just two straight sides, but some are. There are often dormers, valleys, and hip areas. This is where things get a bit tricky. Experienced roofing contractors are used to dealing with these situations and should have no trouble delivering the appropriate number of shingles to your house.
How to Calculate the Cost of a Roof Replacement
Let’s start with a simple straight roofing section that’s easy to calculate. Go to the roof’s ridge and take a measurement all the way around. Then, from the ridge to the bottom of the roof, determine the length. Let’s say the ridge is 60 feet long and the rafter is 16 feet long. 3,600 is the product of multiplying 60 by 16. That’s 9.6 squares or 960 square feet.
If you have a hip roof, you’ll need to calculate the top ridge, bottom ridge, and rafter lengths. Divide the total length of the ridge and the total length of the bottom by two. Then multiply that by the length of the rafter. For example, if the ridge is 20 feet long and the bottom is 35 feet long, 20+35=55, and 55 divided by 2 equals 27.5. If the length of the rafter is 14, multiply 27.5 by 14. That works out to 385 square feet. Since we need squares, the answer is 3.85.
The triangle form, or the end of the hip roof, is a simple one. From top to bottom, measure the length, then the bottom edge. Divide by two after multiplying the length by the height. To calculate the number of squares, multiply the number by 100.