How To Measure Roof Pitch With A Speed Square

Let s assume it is equal to 6 m.

How to measure roof pitch with a speed square.

If you need to find the pitch of an existing roof all you need is a level and a tape measure. Measure with a speed square a speed square and level can be used to easily find the pitch of a roof. Place the pivot point against the shingles. Place the pivot point on the square against the bottom of the rafter and align the 90 degree angle side of the square with the pencil mark.

Read the pitch on the side of the rafter square. A 14 in 36 cm difference for example indicates a pitch of 7 in 18 cm. Let s say it is equal to 1 5 m. Placing a ladder near the roof you will put a level a foot or so up on the roof hold it level and measure from the 12 inch mark straight down.

How to measure roof pitch with a speed square. To find the squares divide the overall roof area by 100 and then round up. A square simply refers to a 10 x 10 square of roofing. Set the level on the edge of the speed square as shown below then place the heel of the speed square on a rafter or gable edge of the roof.

If it s four inches you have a 4 in 12 pitch and so forth for other measurements thereby determining your roof pitch. Then place a torpedo level on the fat base of the rafter square and adjust the square until the level is level. A distance of 7 inches 18 cm for example would mean your roof has a pitch of 7 in 12. Working from the interior side of the roof you ll need access to a roof rafter to measure the pitch.

Measure the rise of your roof. This is simply 100 square feet of roof. If you re using a 2 ft 0 61 m level divide the distance between the level and the roof by 2 to get the true pitch. Use a level and a pencil to make a plumb vertical line on one face of an existing rafter.

Place the level horizontally along the rafter until it contacts the roof sheathing avoiding any protruding roof nails.