Roofing For Roof With 4 12 Slope

This will give you the rise over run or pitch.

Roofing for roof with 4 12 slope.

This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof. 100 1 054 105 4ft 2. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.

This means for every 12 horizontal units the roof must rise a minimum of 4 vertical units. For example a 4 12 pitch roof that is 100 square feet. A 4 12 roof pitch indicates the roof rises 4 inches in height for every 12 inches as measured. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

The roof pitch factor is also used to calculate the length of common rafters. Roofs require slope for adequate drainage and even so called flat roofs must have some incline. Outside of the u s a degree angle is typically used. It is often compared to slope but is not exactly the same.

Most roof s have a pitch in the 4 12 to 9 12 range. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

For example if you measure 4 inches the pitch of your roof is 4 12. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. A roof pitch of 4 in 12 4 12 has a rise of 4 and a run of 12. Simply locate a roof rafter board place the end of the level against the bottom edge and measure from the 12 inch mark vertically to the bottom edge of the rafter.

The slope of the roof provides the rise and the run to be plugged into the equation. Minimum roof slope roof pitch r905 6 2 slate shingles can only be installed on roof slopes of 4 12 or greater 33 slope. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. High and low pitch examples two examples at each end of the spectrum.

For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. Use our roof pitch calculator to find the pitch of your roof. The pitch of the roof is the rise over a 12 inch run.