The 3977 70 is the total of your actual roof measurements.
Roof cut waste.
In the roof material list select your material 3 tab shingles laminated shingles or wood shingles shakes.
The shingles need to be cut and part is used as a starter and part is used as a finisher and they are installed in different places on the roof.
Used in metal w applications for example.
This will be automatically selected if you set auto calculate as the default in preferences.
In order to be in compliance with the neshap while using an rb roof cutter or device that similarly damages the roofing material to cut category i asbestos containing roofing material the dust and debris resulting from the cutting of the roof should be collected as soon as possible after the cutting operation and kept wet until collected and placed in leak tight containers.
In the waste list select auto calculate.
Most often the so called waste from offcut material can be reduced to zero yes zero waste.
If the roof isn t that cut up you may have a couple squares of waste.
The amount of waste you have is largely determined by the crews installation techniques than anything else.
The sub total is 3977 70 x 1 08 4295 92 pitch has been added for 5 12 pitch.
That s because it is the smaller cut up hip roofs that can often have the highest waste percentage.
Lots of experiance will determin what waste you need for what type of roof your doing.
Unless it s cut to ribbons more than likely you ll have a lot of left over bundles at 15 waste factor.
That s 500 to 600 variance on the estimate.
We normally come in at around 4 5 on gables and around 8 9 on cut up roofs.
It could be the difference between winning and losing the bid.
Same size roof now a hip roof at 7 5sq waste.
The waste is 4295 92 95 divisor 4522 02.
If you do not want to add for waste then enter 100 as the divisor.
A 7 5 variance of waste on a 30 square roof would be 2 33 squares.