How To Measure For A Gambrel Roof For Steel

Enter the diameter of the roof ridge vent gap 1 3 finally enter the coverage area width of the panels you plan to buy.

How to measure for a gambrel roof for steel.

How to put a metal roof on a gambrel roof. Move slider or directly enter angle to alter sweep angle of lower rafters and change the shape. Here at 1st coast metal roofing supply we value our customer service and product q. 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.

It does have to contain all the straight lines of your roof and an accurate measurement of those lines. For instance a 38 panel will have an effective coverage width of 36. These pieces should be half the length of your structure and the width of each piece of your rafter. Roughly draw out your roof on a piece of paper.

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. Calculate gambrel angles with graph paper and a protractor. Remember it doesn t have to be to scale or look pretty. 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.

Measure and cut osb or plywood for the roof sheeting. Gambrel roof framing geometry calculator inch this gambrel roof fits in a semicircle and starts as the top half of an equal sided octagon. Install the first sheet with one long edge. Replace any sections of damaged decking using material of a similar thickness and type.

Start at one lower corner along the gambrel end. 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. For example what we need on the picture of the roofs below are measurements of all the blue or red lines. 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.

For a barn style gambrel roof you will need flashing at the top and the 2 middle points where the roof slopes meet. Check overhang to calculate rafter overhang equal to the lower level cut at the full rafter depth. Measure 4 total pieces of 5 inches 1 3 cm thick osb or plywood. Find out how wide each piece of metal is then divide the width of the roof by that number.

The preview drawing displays a dimensioned elevation view of the gambrel roof.