How To Figure Area Of Roof

Hip roof is a roof with a sharp edge or edges from the ridge to the eaves where the two sides meet.

How to figure area of roof.

Find the area of the footprint of the roof 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. Hip roof area calculator. The length l times the height h of a triangle is twice its area a2. Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118.

Find your pitch factor. That gives you 5 590 square feet which is the actual area of the surface of the roof. Here is the online hip roof area calculator which helps you calculate the hip roof parameters such as roof rise common and hip rafters length and roof area based on width height of roof base and the roof pitch identical for all sides. This is expressed in terms of how many inches the roof rises for every foot of.

1 roof square 100 square feet. While it is possible to estimate the amount of necessary materials using only the. L h 2 area calculating an area of a triangle when estimating a roof. A gable roof and a hip roof of the same length and slope will have identical areas.

Next place your ladder against your house at the gable end. Depending whether the roof area is measured horizontally possibly from a drawing or photograph a correction factor is necessary to determine the actual area of the roof. First use your measuring tape to measure 12 inches on your large level and make a mark at the 12 inch line. How to calculate roof area step 1.

Steep roofs measure your house at ground level then add in the roof s overhang for greater accuracy. If your roof is flat or has no more than a 3 in 12 pitch you can calculate its total square footage by simply multiplying the length by the width. Gable or hip roof. You can also zoom the map and click on the starting point of the roof you wish to select.

To calculate the area of your roof first you ll need to calculate the pitch of it. Enter roof dimensions below for your roof in feet or slope as inches rise per foot if you enter only l 1 w 1 h 1 the result will be the area of a single straight gable roof. So if you divide your answer of a product of length times height by two you will get the area of a triangle. After you ve done this you can click along the outer edge of the roof that you wish to calculate the area for.

Determine the dimensions of the roof. Given pitch and a horizontal area measurement multiply the horizontal area by a correction factor corresponding to pitch provided in the table below to determine the actual area of the roof to be used in the roofing material calculator. Multiply the length times the width to calculate the square footage. This applies to lengths as well as areas.

And that s the number you were looking for.