Use Roof Pitch To Cut Rafter Tails

Use a tape measure to measure the entire width of your building.

Use roof pitch to cut rafter tails.

If it rises only 6 for every 12 it s a 6 12 pitch. If the slope rises 6 inches in each horizontal foot the pitch is referred to as 6 in 12 or a 6 12 pitch. There are two typical fascia angles in home construction. Cut 1 by 6 inch lumber to fit along the ends of the rafters from one end of the roof to the other.

The traditional method has been rise inches 12 run inches. Transfer this measurement to the piece of framing. Some architectural designs call for plumb or vertical cuts as opposed to square cut tails. This was then foamed to complete the air seal.

The pitch is defined as the vertical distance a roof rises in each horizontal foot. Then divide the span by two to get the rafter run the length each rafter must cover. Plumb or vertical with the fascia installed vertically parallel with the exterior wall surface and square with the fascia installed perpendicular to the roof pitch. Measure as precisely as possible down to the 1 4 inch 0 64 cm 1 8 inch 0 32 cm or 1 16 inch 0 16 cm.

The metric method for slopes less than 45 degrees shows the first number as 1 all the time so a 1 3 slope would mean a rise of 1 cm. For every 3 cm of run. Choose or determine a pitch the angle at which the rafters rise. For a 24 foot wide building the run would be 12.

In this video you will learn all about common rafters. So if your roof is a 45 degree angle that is for every 12 along the horizontal run it rises 12 it s a 12 12 pitch. Use two nails in the end of each rafter. First determine the width of the building the rafter span and the length for the number of rafters that will be needed.

Cut pieces so that the end joints between pieces fall in the center of a rafter tail. Before you start cutting you first need to determine how long your roof rafters need to be and the angles at which you ll cut the top and bottom of the rafter. Aligning with the overhang chalk line use a hand square to mark the cut line for a square fascia application or use a level to mark the plumb cut for the rafter tails. How to measure or figure rafter length and mark and cut them accurately.

Step 2 place a 2 by 6 board on sawhorses to lay out the first full length or common rafter. Nail these pieces starting at one end of the roof butting each piece flush to the one before. Go back and check out photograph 10. Work from the scaffold and measure the distance from the upper end of the cut rafter to the point where the fascia meets the roof sheathing.

Measure the edge of the roof.