Step #1Divide Divide the above roof plan into two parts (A) and (B). The coverage dimensions for Futurelok Shingle are 17.5" (1.5 ft.) wide by 8.5" (.7 ft.) high.

Step #2- In Part (A) the length of the fascia is 50 ft to determine how many shingles will be needed horizontally, divide 1.5 ft. into 50 ft.= 33.3 or 34 shingles. The rafter measurement is 18 ft. to determine the number of shake panels needed vertically to the ridge divide 18 ft. by .7 ft = 25.7or 26 shingles to the ridge. The number of panels needed to cover Part (A) would be 34 shingles X26 shingles = 884 X 2 (because the rafter length is the same on both sides of the roof) =1768 shingles for part (A).

Step #3- In Part (B) the length of the fascia is 20 ft as explained in Part (A) divide 1.5 into 20ft 13.33 or 14 shingles. The rafter measurement is 12 ft. divide by .7 ft. = 17.2 or 18 courses to the ridge. The total number of panels needed in Part (B) is 14 X 18 X 2 (rafter length the same on the other side)= 504 shingles for Part (B).

Step #4- to calculate waste multiply the linear ft. hips and valleys by .2. For example the linear ft. of hips is 44ft and the linear ft. of valleys is 44ft. To determine the waste multiply 88 ft. of hips and valleys by .2 = 17.6 or 18 panels waste.

Conclusion: The total number of Future panels needed for the roof diagram on page #1 will be Part (A) plus Part (B) plus Waste or 1768 shingles +504 shingles +18 shingles = 2290 divided by 96 pcs. per square = 23.85sqs.

Trims and accessories:

Hip and Ridge Cap coverage is 11" each. Add the hip and ridge = 114 ft. X 12" = 1368" divide by 11"= 125 pcs. add 10% = 137 pcs. of hip and ridge cap.

Note: All the accessories come in 10 ft. lengths:

Valley = 44 ft. or 5 pcs. valley (accounting for overlaps).

Rake or Gable = 60 ft. or 7 pcs. of rake or gable (accounting for overlaps),

Starter = 150 ft. fascia or 16 pcs. of starter (accounting for overlaps).

Step #4- To calculate waste multiply the linear ft. of hips and valleys by .3. For example linear feet of hips is 44 ft., linear feet of valleys is also 44 ft. = 88 ft. total. To determine the waste multiply 88 ft. by .3 - 26.4 or 27 panels of waste.

Quick Formula:

Step #1- Determine the actual square footage without waste. Part (A)= 1800 s/f. + Part (B)- 480 s/f. = 2280 s/f.

Step #2- Determine the linear ft. of hips and valleys = 88 ft.

Step #3- Add Step #1 and Step#2- 2280 s/f +88 ft. = 2368 s/f.

Step #4- Multiply the total by 1.06. or 2368 s/f X 1.06=2510.08s/f or 25 squares