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Chicagoland Roofing Council

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CRC Professional contractors and Local 11 roofers work above delicate roof membranes building watertight roofs.

CRC Professional contractors and Local 11 roofers work above delicate roof membranes building watertight roofs.


A low slope roof according to OSHA’s standard interpretation (Section 1926.500) would be a roof having a slope less than, or equal to, 4 in 12 (vertical to horizontal) which means that there would be a 4 inch or less rise for a 12 inch run. Definitions by others would consider a low slope roof to be a 2 to 4 inch rise for a 12 inch run and under a 2 inch rise to be called a flat roof. The low slope roof drains water more slowly than moderate or steep sloped roofs.. The “flat” roof is not absolutely flat as it, too, has to have sufficient rise for the water to drain. A low slope roof is merely one type of many, and, unless it is a low slope roof that cannot be seen from the ground, most would agree that the color and attractiveness of the materials are most important.

In truth, there is much more important detail to be considered. We could start with judging the expected added weight and amount of rain and snow, the speed of the winds, the heat of the sun, and other aspects which we may not think, or know, to consider at all.

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Posted by FanningCommunications on Jan 1st, 2012 and filed under Feature Story. You can follow any responses to this entry through the RSS 2.0. You can leave a response by filling following comment form or trackback to this entry from your site

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