Roof Cut Waste

Consider ordering a few extra panels to account for more cuts and waste.

Roof cut waste.

It s a good idea to order an extra 10 to account for cutoffs and waste material. Some of the cutoffs will be big enough to use as starter shingles or in other areas where cut shingles are needed but smaller cutoffs will be waste. Length of a shingle. Remove the shingles in a 6 inch square around the base of the stack pipe.

Most often the so called waste from offcut material can be reduced to zero yes zero waste. For more complex roofs with many peaks and sections find he square footage of each roof section and add them all together to find the total square footage. Hip roof ply cut angle diagram 1138 93 ft 35 6 sheets waste 40 sheets sheets rounded up to next full sheet for a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. Also show waste for valleys hips and or rakes and added to your squares.

Cut away the shingles from the stack pipe base using a utility knife. Plan for waste factor. That s because it is the smaller cut up hip roofs that can often have the highest waste percentage. The following table provides the roof pitch multiplier for roofs of various slopes.

The 3977 70 is the total of your actual roof measurements. That s 500 to 600 variance on the estimate. For regular hips and valleys where the roof sections have the same slope and meet to form a 90 degree angle. Repeat the run not the length of a common rafter for precision the thickness of the ridge board and any eave.

The hip and valley factor is a number that is multiplied by the actual run horizontal distance of a common rafter to determine the length of a hip or valley rafter. Applicad s unique metal block cutting process is the most effective waste reduction system for metal roof panels in the world. Ensure that the base roof underneath is free of nails and pieces of shingling material. Brush roofing tar onto the area around the soil stack that you just cleared.

The waste is 4295 92 95 divisor 4522 02. After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking. A 7 5 variance of waste on a 30 square roof would be 2 33 squares. For a more detailed explanation of the roof pitch multiplier see how to find the area of a sloped roof if you know the roof pitch in degrees find the secant of the slope using a scientific calculator for example if the roof pitch is 45 then sec 45 1 414213.

The top row is a total of your roof area measurements with pitch added 5 for waste.