Organic roof shingles have mostly gone by the wayside over time due to their short lifespan.
Hip roof shingle waste.
The difference is in the amount of ridge capping you need and the amount you will waste.
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.
Asphalt roof shingles are available as the common 3 tab shingle or the more durable architectural roof shingle.
From there the waste factor increases with every obstruction such as a chimney and with every hip or valley.
The sub total is 3977 70 x 1 08 4295 92 pitch has been added for 5 12 pitch.
Same size roof now a hip roof at 7 5sq waste.
If the roof isn t that cut up you may have a couple squares of waste.
Moreover during the process of the repair some shingles and tiles might slide off.
Waste is calculated at 7 5 for a gable roof and 15 for a hip roof which are typical in the roofing industry.
Other simple gable roofs will require cut shingles at the rakes.
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.
Simply enter your roof dimensions and roof type such as gable or hip and approximate roof pitch.
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.
A 7 5 variance of waste on a 30 square roof would be 2 33 squares.
That s because it is the smaller cut up hip roofs that can often have the highest waste percentage.
Length of a shingle.
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.
The top row is a total of your roof area measurements with pitch added 5 for waste.
The 3977 70 is the total of your actual roof measurements.
Keep in mind that the roof shingle calculator assumes zero waste.
Also show waste for valleys hips and or rakes and added to your squares.
The only roof that will generate no waste from cutting is that rare simple gable whose roof length is divisible by the 3 ft.
It could be the difference between winning and losing the bid.
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.
For example consider a typical 50sq gable roof with 5sq of waste.
A hip roof s square footage is equal to that of a gable roof with the same dimensions.
