Formula For Measuring A Hip Roof

Add the combined areas of the 2 longer faces with those of the 2 shorter faces.

Formula for measuring a hip roof.

Add the areas of the faces of the hip roof to find the total area of the hip roof in square feet. Calculate the amount of asphalt or fiberglass shingles needed to cover a hip roof. If you re trying to work out the total area of the roof of a square building simply multiply the area of one of the identical faces by 4. The top ridge will be shorter than the one of the gable roof but the four hips will add to the ridge length.

If you are trying to undertake this all yourself then you should really be looking for the most effective way of working out things like the hip roof square. 1 pyramid hip roof roof base is a square roof sides are identical isosceles triangles 2 hip roof roof base is a rectangle two sides are identical isosceles triangles and two sides are identical trapeziums. Step 5 multiply the total square foot area of the hip roof by 5 percent or 05 for the amount of extra roofing material you ll need to allow for waste due to roofing error or damaged material. H b x tan α 2 common rafters b 2 x cos α hip rafters h 2 b 2 2 hip roof area 2 x common rafters x roof base length where h roof rise b roof base width α roof pitch tan tangent cos cosine.

A hip roof s square footage is equal to that of a gable roof with the same dimensions. The pythagorean theorem allows you to calculate the length of the hip rafter without measuring it directly which requires you to climb onto the roof. Calculate the square footage area of a hip roof. This theorem states that the length of a right triangle s hypotenuse is equal to the square root of the sum of the squares of the lengths of the triangle s other two sides.

For many people being able to get the right kind of hip roof calculator is very important as knowing how to measure a hip roof is going to be vital to making sure that it turns out well. The top ridge will be shorter for a hip roof but the 4 hips will add to the amount of ridge capping needed and because of the angles the amount of waste will be higher than for a similar sized gable roof. The difference is in the amount of ridge capping you need and the amount you will waste. The only difference in this calculation to the one for a gable roof area is the amount of the ridge.