How To Build A Roof (With Pictures)

Published Nov 11, 20
5 min read

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Measure from the point on the blade to the point on the tongueit ought to be 14-7/16 inches (commercial roofing contractors). Multiply this by the run of the building. We're using 10 feet in this example, leaving out the overhang. The resulting figure is 144-1/2 inches. We add 12 inches for the overhang to get a last figure of 156-1/2 inches.

Analyze the rafter board to figure out if there is any curve or "crown" in the board. You must make this first pattern rafter on the straightest board you can find. If there is any curve in the board, set out the rafter so the crown is up or dealing with far from you.

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( If the crown were to be placed down, the roofing could ultimately droop.) Then set out the rafter as shown on the next page. This example is for a roofing system with an 8/12 pitchPosition the square at the end of the rafter board, with the tongue on your left and facing away from you.

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Mark along the behind of the tongue. This is the plumb cut for the roofing ridge. Step form the top of this line down the board to determine the line length, or length of the rafter, less the ridge board. This frequently is a 2-by or 1-1/2- inch board, so the measurement is less inches.

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Holding the square in the very same position as previously, discount to the side of the tongue. This marks the plumb cut at the inside of your house wall for the notch (called a bird's mouth) to seat the rafter one the wall plate. Add the length of the overhang beyond this mark and mark it.



In the example shown this is 12 inches. Cut the rafter at the ridge line and at the overhang line. Then hold the square on the plumb line that marks the bird's mouth. Figure out the wall density or depth of the bird's mouth cut and make a mark - commercial roofing. Cut the notch, first with a handsaw or portable circular saw, and then complete the cut with a handsaw.

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Continue moving down the rafter and marking plumb cuts, including any odd figures. One technique of laying out rafters with a square is called "stepping off." Make a replicate rafter from the pattern. affordable roofing. Then lay the rafters out on a smooth, flat surface, with a 2-by in between them at the ridge line.

You might want to check these on the structure prior to cutting the rest of the rafters. As soon as you make sure these 2 pattern rafters are properly cut, mark them as patterns and mark and cut the required variety of rafters. If the structure has hanging or "fly" rafters for the gable ends, cut them too.

Make certain you thoroughly follow the pattern rafter. A variety of years ago I was building a two-story structure. One carpenter laid out and started to cut the rafters. He became ill from the extreme heat of the day and another carpenter took over for the last third of the rafters.

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I don't know if the 2nd carpenter didn't utilize the pattern rafter, or merely wasn't as accurate, however it was a costly mistake. The brand-new C.H. Hanson Pivot Square makes the task of setting out a roof rather basic. I want I had this tool a variety of years and structures earlier.

It includes its own durable belt holder that is likewise designed to hold a carpenter's pencil and the guideline booklet. The brand-new C.H. Hanson Pivot Square makes it eady to set out rafters. this quality tool comes with its own belt pouch and has dividers for the square, an instruciton handbook and a carpenter's pencil.

Degrees and rise are marked on a blade connected to the rotating arm. With the common rise figures facing you, and the raised fence on the right, the bottom represents the base of the triangle (the run) and the best side the altitude (the increase). The long adjustable edge represents the hypotenuse of the triangle, or the line length.

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Just adjust the square to the wanted pitch and lock in location with the knurled knob. You can then utilize the square to transfer the angle for the cut to the lumber. Or you can hold the square in place and utilize it as a durable guide for running a portable circular saw.

Determine the pitch, then you can set a miter saw or compound miter saw to make cuts in degrees that comply with the preferred pitch. The Pivot Square can likewise be used to set out pitches steeper than 12/12, in addition to to lay out hip-valley rafters. These figures are identified on the rear end of the square.

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How To Build A Roof (With Pictures)

Published Nov 11, 20
5 min read