How To Measure For A Gambrel Roof For Steel

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How to measure for a gambrel roof for steel.

Measure 4 total pieces of 5 inches 1 3 cm thick osb or plywood. To calculate a gambrel roof select gambrel roof from the roof type dropdown list or click on the appropriate toolbar button to calculate a gambrel roof. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Find out how wide each piece of metal is then divide the width of the roof by that number.

Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Tear off any old roofing down to the decking. So for example if your barn is 10 by 12 feet 3 0 m 3 7 m each piece of osb should be 6 by 3 83 feet 1 83 m 1 17 m. For instance a 38 panel will have an effective coverage width of 36.

Roughly draw out your roof on a piece of paper. The metal roof length calculator calculates the distance from peak to trim so add the length you want the roof metal to extend beyond the eave trim. The preview drawing displays a dimensioned elevation view of the gambrel roof. Install the first sheet with one long edge.

Measure and cut osb or plywood for the roof sheeting. How to put a metal roof on a gambrel roof. Gambrel installation subscribe to our page for more metal roofing videos. You will need this many pieces for a single sloped roof or each of the 2 slopes of a gable roof or 4 slopes of a barn style gambrel roof.

Draw a semi circle on the graph paper mark a center peak at the top and draw two lines on each side in the shape desired for the gambrel roof. Enter the diameter of the roof ridge vent gap 1 3 finally enter the coverage area width of the panels you plan to buy. These pieces should be half the length of your structure and the width of each piece of your rafter. For example what we need on the picture of the roofs below are measurements of all the blue or red lines.

Calculate gambrel angles with graph paper and a protractor. Start at one lower corner along the gambrel end. Use the protractor to measure those angles at the peak the walls and the point where the two lines intersect on the top side of the roof. Remember it doesn t have to be to scale or look pretty.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape.