Roofing For Roof With 4 12 Slope

A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

Roofing for roof with 4 12 slope.

For most home styles roof pitches fall in a range 4 12 a moderate slope up to 8 12 fairly steep. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. It is often compared to slope but is not exactly the same. Minimum roof slope roof pitch r905 6 2 slate shingles can only be installed on roof slopes of 4 12 or greater 33 slope.

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. This means for every 12 horizontal units the roof must rise a minimum of 4 vertical units. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Roofs require slope for adequate drainage and even so called flat roofs must have some incline.

This will give you the rise over run or pitch. Examples of extreme slopes range from 1 4 12 almost flat to 12 12 sloping down at a perfect 45 degree angle. 100 1 054 105 4ft 2. Most roof s have a pitch in the 4 12 to 9 12 range.

Outside of the u s a degree angle is typically used. The table below shows common roof pitches and the equivalent grade degrees and radians for each. The pitch of the roof is the rise over a 12 inch run. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance.

The slope of the roof provides the rise and the run to be plugged into the equation. A 4 12 roof pitch indicates the roof rises 4 inches in height for every 12 inches as measured. The roof pitch factor is also used to calculate the length of common rafters. Use our roof pitch calculator to find the pitch of your roof.

Simply put it s a shallow roof. 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. Roof pitch area multipliers. 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.

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. High and low pitch examples two examples at each end of the spectrum. A roof pitch of 4 in 12 4 12 has a rise of 4 and a run of 12.