How To Measure For A Gambrel Roof For Steel

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.

How to measure for a gambrel roof for steel.

Remember it doesn t have to be to scale or look pretty. Start at one lower corner along the gambrel end. For a barn style gambrel roof you will need flashing at the top and the 2 middle points where the roof slopes meet. For example what we need on the picture of the roofs below are measurements of all the blue or red lines.

Roughly draw out your roof on a piece of paper. Find out how wide each piece of metal is then divide the width of the roof by that number. Measure and cut osb or plywood for the roof sheeting. How to put a metal roof on a gambrel roof.

These pieces should be half the length of your structure and the width of each piece of your rafter. Install the first sheet with one long edge. 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.

Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Enter the diameter of the roof ridge vent gap 1 3 finally enter the coverage area width of the panels you plan to buy. 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. The preview drawing displays a dimensioned elevation view of the gambrel roof.

It does have to contain all the straight lines of your roof and an accurate measurement of those lines. 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. Gambrel installation subscribe to our page for more metal roofing videos. Here at 1st coast metal roofing supply we value our customer service and product q.

Measure 4 total pieces of 5 inches 1 3 cm thick osb or plywood. 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. For instance a 38 panel will have an effective coverage width of 36. Tear off any old roofing down to the decking.

Calculate gambrel angles with graph paper and a protractor.