1 Slope Roof

You should find a company that specializes in pvc or tpo and does some residential work.

1 slope roof. See low slope roofing. Think of a classic addams family haunted house with its soaring peaks and you have a. So the actual roof surface if it were laid down flat on the ground would be 1 118 times larger than the footprint of the roof. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed.

If asphalt shingles are to be installed on a low slope roof special steps are required to avoid short roof life and roof leaks. Metal roof panels should be installed on roof slopes according to particular seams 2015 irc r905 10 2. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. The exact roof slope in degrees is given by the arctangent.

Roofs on victorian era houses were often sharply angled with a steep pitch. Minimum roof slope roof pitch r905 9 1. Thus pitch is typically greater in areas of high rain or snowfall. Built up roofs must have a design roof slope of 1 4 12 or greater 2 slope.

This means for every 12 horizontal units the roof must rise a minimum of one fourth vertical unit. This pitch might be as low as 1 12. Generally these roofs have a pitch from 1 2 12 to 2 12 from 4 2 to 16 7. In degrees 10 2 in 12 or 1 in 6 is considered a minimum.

Flat roofs are not perfectly flat in reality they need a small slope for water runoff. A pvc or tpo less costly membrane would be your best bets. Definitions vary on when a roof is considered pitched. Slopes greater than 18 12 are found on a frame roofs and some mansard style.

Take the area of the roof s footprint say it s 5 000 square feet and multiply 5 000 by 1 118. Visually this roof appears flat. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. Coal tar built up roofs however can have a design roof slope of 1 8 12 1 percent but no less.

It was fashionable for modern style homes built in the 1960s to have little pitch just a barely negligible slope to help drain water. We recommend installing a single ply membrane over that portion of the roof with a slope less than 3 12. That gives you 5 590 square. And for a roof with a slope of 6 12 that number 1 118 is your roof slope multiplier.

Built up roofs should be installed on roof slopes 0 25 12 or greater 2015 irc r905 9 1 except for coal tar built up roofs that have a minimum roof slope of one eighth unit vertical in 12 units horizontal 1 slope. Some sources consider low slope to include 3 12 pitch roofs. Roof pitch is used to describe the slope or angle of the roof. These are generally difficult in maintenance as they require special materials to avoid leaks.

Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot. Low slope roofs are from 0 to 3 12 in pitch.