How To Measure Roof Pitch From Inside

To determine the y height measure from the bird s mouth up the calculated slope x in 12 to the top of the rafter.

How to measure roof pitch from inside.

Measure the rise of your roof. Use a level against the underside of the rafter you re measuring to get the most accurate value. 8 inches and you have an 8 in 12 pitch. 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.

If this distance measures 4 inches you have a 4 in 12 pitch. Place one end of a carpenter s level against the underside of the. Let s say it is equal to 1 5 m. Roof pitch angle in degrees the measurements are taken from the bottom of the rafters the procedure to calculate roof pitch is the same.

Using ruler and tape you can do it anyway of these ways. Roof pitch calculator results explained. Pitch measurement method 1 1. 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.

This method tends to be more accurate because no layers of roofing are involved. To determine the finished height of the ridge beam add the rise m and the y height. Any of the following will give you a good measurement 1 x research source a rafter in the attic. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level.

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. The most precise way to find the roof s slope is by measuring it from the underside. Step 1 access a rafter. Pitch is expressed as x in 12 inches.

A barge rafter at the side of the gable step 2 position a level against the underside of the rafter. Measure the run length it is the horizontal distance between the roof ridge and the wall of the building. Calculate the rafter length substituting these values. The overhang of a rafter at the end of the roof.

Locate the level s 12 inch mark. To use this method there are 3 possible places to take your measurements. To find the pitch of your roof you ll first need to set up a ladder tall enough to reach it. Access one of the rafters then take the measurement this way.

Roof slope calculator example of use. 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. On a ladder at the walled part of the pitched roof place the level against the roof overhang rafter with the 12 inch.