How To Measure Roof Pitch From Inside

Step 1 access a rafter.

How to measure roof pitch from inside.

The top of the ridge beam m y. If this distance measures 4 inches you have a 4 in 12 pitch. Measure the run length it is the horizontal distance between the roof ridge and the wall of the building. Access one of the rafters then take the measurement this way.

8 inches and you have an 8 in 12 pitch. Let s say it is equal to 1 5 m. To determine the y height measure from the bird s mouth up the calculated slope x in 12 to the top of the 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. Roof pitch calculator results explained. The overhang of a rafter at the end of the 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.

Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. Pitch measurement method 1 1. On a ladder at the walled part of the pitched roof place the level against the roof overhang rafter with the 12 inch. Measure the rise of your roof.

Roof pitch angle in degrees the measurements are taken from the bottom of the rafters the procedure to calculate roof pitch is the same. This method tends to be more accurate because no layers of roofing are involved. Use a level against the underside of the rafter you re measuring to get the most accurate value. 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.

Locate the level s 12 inch mark. Calculate the rafter length substituting these values. Any of the following will give you a good measurement 1 x research source a rafter in the attic. 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. Using ruler and tape you can do it anyway of these ways. 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. Place one end of a carpenter s level against the underside of the.

Let s assume it is equal to 6 m. To determine the finished height of the ridge beam add the rise m and the y height. First measure 12 inches from one end of the level and make a mark. Roof slope calculator example of use.