4 4 Over 12 Roof Pitch

The term pitch and slope are often used interchangeably which is incorrect.

4 4 over 12 roof pitch. If this isn t practical then perform the same measurement on the underside of the roof. A 4 12 roof pitch indicates the roof rises 4 inches in height for every 12 inches as measured horizontally from the edge of the roof to the centerline. Layout step 1 measure the width of your side walls at the top from outside to outside using a tape measure. For every 12 horizontal feet.

On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. 48 10 4 8. Since pitch is the rise over a 12 inch run divide the run by 12 to get the multiplier in this case 120 12 10. For example given a roof with a rise of 4 feet and a span of 24 feet the pitch is 1 to 6 pitch which can be expressed as the fraction of 1 6.

The 4 12 pitch is a roof that rises vertically toward the peak 4 inches for every 12 inches of horizontal run. This means if a roof rises 4 in the length of 12 your roof pitch would be 4 12 or 18 43 degrees. The pitch of a roof is nothing more than a ratio that indicates how much rise there is in the roof over a 12 unit horizontal distance. Roof pitch degree table.

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. 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. Image 1 12 to 12 12 roof pitch 7 12 pitch. The pitch of this roof is 4 8 12.

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. For example if you measure 4 inches the pitch of your roof is 4 12. The calculator above can handle much of this math. We included a roof pitch chart below the 7 12 example image and the calculator below that.

Add at least 12 inches to either side for eaves which are typically 12 to 36 inches depending on the style of the structure. Now divide the rise by the multiplier to get the pitch eg. 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. The roof s incline increases four feet for every 12 feet of horizontal measurement.

The gentle slope of a 4 12 pitch roof falls. A 12 to 24 pitch is expressed as 1 2.