How To Calculate Hip Roof

A hip roof s square footage is equal to that of a gable roof with the same dimensions.

How to calculate hip roof. Minus ridge thickness to allow for ridge becoming pole plate roof peak will be slightly higher ridge thick must be same as common. Select the following information by using the drop downs to enter values in feet and inches. Enter the extension wall length into wall length and double the extension wall width then minus ridge thickness into the wall width entries. Calculate the amount of asphalt or fiberglass shingles needed to cover a hip roof.

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. To do this your best bet is definitely finding a good hip roof construction calculator so that you can work it all out in a timely and simple fashion. To calculate a hip roof select hip from the roof type dropdown list or click on the corresponding button on the toolbar to calculate a hip roof. The difference is in the amount of ridge capping you need and the amount you will waste.

The preview window displays a dimensioned plan view of the hip roof. Here you can calculate hip roof parameters by hip raise and base parameters. Porch roof extensions for hip roof porch extensions from an existing building wall you can use half the calculator results. From your average hip roof calculator to something more specific like a hip roof rafter calculator there is plenty to consider with this kind of calculation.

The roof area is simply 114x18x2 plus 30x18x2 giving 5184 square feet which is perfectly adequate for estimating materials. 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.