Estimate Roof Size From Floor Plan

Conventional slope roof range between 4 in 12 and 8 in 12.

Estimate roof size from floor plan.

From the diagrams there are two intersecting roofs measuring 114 feet and 30 feet at the eaves with equal rake of 18 feet. A low slope roof is anywhere from 2 in 12 to 4 in 12. The next thing to determine is the roof pitch see how to determine roof pitch the easiest and most accurate method to measuring a roof plan is to square everything off. These benefits do not come cheaply though.

Steeper sloped roofs are considered more aesthetically pleasing and last longer. A 12 in 12 roof can cost up to 50 more than a 4 in 12 roof. This is a rather complicated way to estimate a roof area and hardly suited to the diy fans. In this drawing a 1 8 scale ruler is being used.

Assuming a single story rectangular house with a hip roof that has two foot overhangs on each side of the house we have approximately 13 squares or 1 300 square feet of 2d roof surface area. Anything more than 9 in 12 is considered steep. While it is possible to estimate the amount of necessary materials using only the total roof area measurement as can be seen from the table depending how large the pitch of the roof the actual area of the roof can differ by up to 2 236 from the measured total area at a pitch of 24 12. Now based on the info provided your home s floor plan is roughly 1 000 sq ft.

So continuing our example if you ve got a two story house with a total square footage of 2 700 square feet with each floor having.