How To Measure Roof Pitch From Inside

Calculate the rafter length substituting these values.

How to measure roof pitch from inside.

The most precise way to find the roof s slope is by measuring it from the underside. 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. Pitch measurement method 1 1. This method tends to be more accurate because no layers of roofing are involved.

Using ruler and tape you can do it anyway of these ways. Measure the rise of your roof. On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof. Roof pitch calculator results explained.

The top of the ridge beam m y. Step 1 access a rafter. To find the pitch of your roof you ll first need to set up a ladder tall enough to reach it. To use this method there are 3 possible places to take your measurements.

To determine the y height measure from the bird s mouth up the calculated slope x in 12 to the top of the rafter. First measure 12 inches from one end of the level and make a mark. Place a level against the rooftop a few feet in from the edge and angle it so that the floating bubble is centered then measure the distance from the end of the level to the surface of the roof. Measure the run length it is the horizontal distance between the roof ridge and the wall of the building.

Roof slope calculator example of use. Roof pitch angle in degrees the measurements are taken from the bottom of the rafters the procedure to calculate roof pitch is the same. If this distance measures 4 inches you have a 4 in 12 pitch. Pitch is expressed as x in 12 inches.

To determine the finished height of the ridge beam add the rise m and the y height. The overhang of a rafter at the end of the roof. Measuring from the underside of the roof is usually the most accurate way to find the slope since there is no roofing material to make an uneven surface. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

Any of the following will give you a good measurement 1 x research source a rafter in the attic. Access one of the rafters then take the measurement this way. On a ladder at the walled part of the pitched roof place the level against the roof overhang rafter with the 12 inch. Let s say it is equal to 1 5 m.

Let s assume it is equal to 6 m. 8 inches and you have an 8 in 12 pitch. A barge rafter at the side of the gable step 2 position a level against the underside of the rafter. How to measure roof pitch to measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.