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Square building roof.
As the name suggests a pyramid roof is a roof in the shape of a pyramid and is designed for a square building.
A hip roof uses the same basic shape but is elongated and is designed for a rectangular building.
Fortunately one can frame square rafters fairly simply using a framing square and a construction calculator.
Refer to figure 13 1 where diagonals ad and bc af and be are equal.
The hip roof is also very popular in north america.
Think of the steel roofing as being very strong very thin plywood it will hold the roof in the position it was in when installed.
Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material.
If you take the time to properly square a roof you will be glad you did when you install the roof steel and add the trims.
The strength of properly installed steel roofing is frequently underestimated.
By severe i mean that on a roof that measures 17 feet from eave to ridge and a little over 29 ft wide i snapped my lines for starting out square using multiples of the 3 4 5 method and found out that the roof was basically a trapezoid being 5 inches out of square at the top left of the roof and approximately the same on the right hand lower.
Serious errors have been caused by lack of consistency.
Hip and pyramid roofs.
1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square.
Then if the plywood sheets are each 20 square feet 1 9 m 2 divide 96 by 20 to calculate that you ll need 4 8 sheets of plywood.
Be certain to measure from the same point going each direction.
Multiply the number of roofing squares for a low pitch roof by 1 06 to 1 08 to get the square roof area.
Multiply the number of roofing squares for a medium pitch roof by 1 12 to 1 25 or by 1 3.
Make certain the roof is square by checking diagonals from peak at one end to eave at the opposite corner.
If you are replacing your current roof add 125 to 500 per roofing square for old roof removal.
The total length is then 32 feet 9 8 m and the total area of the roof is 96 square feet 8 9 m 2.
This free roofing calculator estimates the area of a roof and the amount of materials required to replace or build said roof.
To build a hip roof start by measuring the width and height of the building you re putting the roof on.