are added together, the total is divided by 100 for the total number of squares. This will be rounded up to the next whole square. Example House A house is 40' x 30' x 9' feet high at the eaves. Front is 40' x 9' or 360 sq. ft. Back is the same or 360 sq. ft. Right end is 30' x 9' to the eave line or 270 sq. ft. Left end is the same or 270 sq. ft. Total = 1260 sq. ft. Calculating Gable Area Width of the house is 30' with a 12" or 1' overhang, front and rear. This totals a gable width of 32'. The roof pitch of this house is 5 in 12, which means for every foot of run, the gable rises 5". The run is always half of the total width, in this case 32', so the run is half of that, or 16'. To convert the 5" to feet, divide it by 12. (5 divided by 12 = .42 ft.) To figure the height of the gable, multiply the run of 16' by the rise per foot or .42'. 16' x .42' = 6.72'. This is the gable's height at the center. Multiply the width by the height: 32' x 6.72' = 215 sq. ft. Multiply this by .75 to allow for waste in cutting along the rake. 215 sq. ft. x .75 = 161.2 sq. ft. in one gable. You have two gables, so multiply 161.2 x 2 which