How To Measure A Roof For Shingles With Valleys

Roofing is measured in squares.

How to measure a roof for shingles with valleys.

Then multiply that number by 3 to figure out how many shingle bundles that amounts to since shingles typically come in a bundle that s large. Below there is a simple triangle and the math used to work out. Begin to install roof shingles on either roof face. To convert linear footage of such items into square footage one would divide the linear measurement in two and the result would be a square footage calculation.

Nail down each valley shingle at least two inches 50 mm back from the chalk line. The key is to be as accurate as possible since falling short or an overage could mean thousands of dollars when planning your roofing budget. 10 for purposes of shingles extra material must be factored for starter shingles used at rake edges roof eaves areas and for lining both sides of all valley areas. I usually only run it under the valley area and at the end of the roof where ice dams can form to prevent the water from seeping under the shingles and paper.

To measure for roofing shingles start by calculating the area of each plane or section of the roof. Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry. Note that in the last 3 4 years costs of roof shingles and many accessories have gone down by an average of 18 20 currently the us national average for benchmark architectural shingles is around 74 51 square or 25 per bundle. Next divide your total area by 100 to calculate the number of roofing squares you ll need to buy.

To figure out your roof s area a simple geometry can be used. Over driving nails is always a.