Roof Area Data

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.

Roof area data. Our roof calculator uses base length and base width to find the estimated area. 2 estimate the roof drain outlet size you will likely use. Divide total roof area by area found in step 3 to obtain the number of drains required example. R value of various materials.

Area is defined as the expanse or measurement of a given surface and there are a few methods for measuring your roof s area. 4 roof drain 3 determine your building s location on the above map to determine the approximate rainfall as measured in inches per hour. Eagleview has spent the last 20 years pushing the boundaries of image capture and analysis. For a 4 hourly rainfall and 4 leader each drain can handle 4 600 sq.

From table 1 one 4 leader at 4 rate of rainfall will take care of 3 460 sq. Roof area is 200 x 500 100 000 sq. Determine rate of rainfall for this example use 4. The base width is the distance from one corner of your roof to the other at its base on the short side of your house.

You should of course see the manufacturer provided technical data sheet for the r value of specific products. After studying building plan and physical arrangement assume that 4 leaders are required for this project. Below to obtain roof area that can be handled by each leader. Total roof area 500 by 200 100 000 sq.

Number of roof. Equals 32 6 or 33 drains required. For a very good introductory overview article on r value see r values over at the website of. There are currently over 50 000 establishments engaged in the installation roofing siding and sheet metal work valued at a total of 31 4 billion.

Divided by the 4 600 sq.