To calculate the size of the roof you need to measure the size of the roof as if it were flat account for roof pitch calculate square footage and finally determine how many squares of material are required for the roof.
How to figure shingles for a hip roof.
Steep slope roof pitch of 12 or 45 degrees.
However if you are using heavier shingles you will require 4 to 5 bundles for a square.
Medium low slope roof pitch of 3 or 4.
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.
It is common to use 3 bundles to a square of shingles.
Feet inches enter the width of the building.
A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.
Ft enter a waste factor.
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.
In the figure b.
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.
Find the area of the footprint of the roof.
Multiply these numbers and then divide the answer by two.
Find the dimensions of each of the roof s faces.
For trapezoidal roofs measure the bottom edge the top edge also known as the ridge and the distance between the 2 edges.
Enter the length of the building.
As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.
Above a sketched portion is a basic triangle.
If the roof has a triangular shape stretch your tape measure along the bottom edge then measure from the peak point down to the center of the bottom edge.
A hip roof split in half.
Medium slope roof pitch of 6.
However shingles are packaged in a way that they are light enough for the average person to carry around.
Rise 12 enter the square foot one pack will cover.
Note that if your roof has a low slope below 3 pitch asphalt shingles are not the right material for it.
Inches enter the pitch of the roof.
30 18 2 270 square feet.
When you are using 3 bundles for a square you will be getting 29 standard shingles in each bundle.
Medium steep slope roof pitch of 9.