12 Over 4 Roof

This will give you the rise over run or pitch.

12 over 4 roof. The roof on the house i m building is a dutch gable essentially a hip roof with gables that peek out at each end of the ridge with a 6 12 pitch and 32 overhangs. The table below shows common roof pitches and the equivalent grade degrees and radians for each. A roof s pitch is determined by how much it rises for every foot it runs. A roof that rises 4 inches for every 1 foot or 12 inches of run is said to have a 4 in 12 slope.

The roof s incline increases four feet for every 12 feet of horizontal measurement. A 4 12 slope is enough to accommodate water runoff but is not suitable for regions that are. If this isn t practical then perform the same measurement on the underside of the roof. Image 1 12 to 12 12 roof pitch 7 12 pitch.

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. A 4 12 roof pitch indicates the roof rises 4. Highly recommend either checking out the program martin linked to or a program like sketchup so that window size and placement can be modelled holistically with overhang design. 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.

A 4 12 roof pitch can also be expressed as 4 over 12 and when you re talking to a roofer this is the most common way you ll hear it explained because it s easy to say in conversation. For example if you measure 4 inches the pitch of your roof is 4 12. Add at least 12 inches to either side for eaves which are typically 12 to 36 inches depending on the style of the structure. We included a roof pitch chart below the 7 12 example image and the calculator below that.

The rise is the distance from the top of a stud wall to the peak of the roof. Roofs require slope for adequate drainage and even so called flat roofs must have some incline. Layout step 1 measure the width of your side walls at the top from outside to outside using a tape measure. 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.

The 4 12 pitch is a roof that rises vertically toward the peak 4 inches for every 12 inches of horizontal run. If the rise is 6 inches for every 12 inches of run then the roof slope is 6 in 12 the slope can be expressed numerically as a ratio. Is a 4 12 pitched roof considered low or moderate. Another way to express a 4 12 pitch is 4 and 12 in this pitch the four is your roof s rise and the twelve is the roof s run.

Most roof s have a pitch in the 4 12 to 9 12 range. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.