The 3977 70 is the total of your actual roof measurements.
Hip roof shingle waste.
Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry.
A 7 5 variance of waste on a 30 square roof would be 2 33 squares.
Other simple gable roofs will require cut shingles at the rakes.
Keep in mind that the roof shingle calculator assumes zero waste.
A hip roof s square footage is equal to that of a gable roof with the same dimensions.
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.
That s because it is the smaller cut up hip roofs that can often have the highest waste percentage.
From there the waste factor increases with every obstruction such as a chimney and with every hip or valley.
Organic roof shingles have mostly gone by the wayside over time due to their short lifespan.
Our calculator will help you estimate the amount of roofing shingles needed for your project plus the cost of materials and accessories.
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.
Asphalt roof shingles are available as the common 3 tab shingle or the more durable architectural roof shingle.
The sub total is 3977 70 x 1 08 4295 92 pitch has been added for 5 12 pitch.
The difference is in the amount of ridge capping you need and the amount you will waste.
It could be the difference between winning and losing the bid.
The top row is a total of your roof area measurements with pitch added 5 for waste.
Note that in the last 3 4 years costs of roof shingles and many accessories have gone down by an average of 18 20 currently the us national average for benchmark architectural shingles is around 74 51 square or 25 per bundle.
Also show waste for valleys hips and or rakes and added to your squares.
The top ridge will be shorter for a hip roof but the 4 hips will add to the amount of ridge capping needed and because of the angles the amount of waste will be higher than for a similar sized gable roof.
Moreover during the process of the repair some shingles and tiles might slide off.
Length of a shingle.
The fiberglass mat used in today s asphalt shingles used to be an organic felt mat consisting of wool cellulose wood fiber or waste paper.
For example consider a typical 50sq gable roof with 5sq of waste.
This is rarely the case however since not all homes have dimensions that can be perfectly fit with 12 inch x 36 inch shingles.
If the roof isn t that cut up you may have a couple squares of waste.
The only roof that will generate no waste from cutting is that rare simple gable whose roof length is divisible by the 3 ft.
Unless it s cut to ribbons more than likely you ll have a lot of left over bundles at 15 waste factor.
