G.A.P. Roofing

G.A.P. Roofing

Available at BPI of Iowa branches. Not available at BPI of Council Bluffs, BPI of North Dakota, BPI of South Dakota, and BPI of Wisconsin branches.

G.A.P. Roofing offers different options in saturated roofing felt and are 100% American made products.


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G 15 Felt

GAP G 15 roofing felt is a widely accepted underlayment product that is manufactured from organic felt and is saturated with asphalt. G 15 felt underlayment is applied over the roofing deck before installation of asphalt shingles. This is recommended for use with 20 year asphalt shingles.

  • This product is sold as is and is not ASTM rated.
  • Width of roll = 36”
  • Mass of saturated felt roll = 8.0 lbs/ 100 ft sq
  • Mass of asphalt saturant = 4.0 lbs / 100 ft sq
  • Mass of desaturated felt = 4.0 lbs / 100 ft sq
  • Saturation by weight (min) = 80%
  • Pallet size = 40” X 40”
  • No. of rolls per pallet = 35

G 30 Felt

GAP G 30 felt is an economical underlayment product that is manufactured from superior quality organic felt that is saturated with asphalt. GAP G 30 felt underlayment is applied over the roofing deck before installation of asphalt shingles.

  • This product is sold as is and is not ASTM rated.
  • Width of roll = 36”
  • Mass of saturated felt roll = 13.0 lbs/100 sq ft
  • Mass of saturant = 6.0 lbs/100 sq ft
  • Mass of desaturated felt = 5.0 lbs / 100 ft sq
  • Saturation by weight (min) = 100%
  • Pallet size = 40” X 40”
  • No. of rolls per pallet = 35

GAP ASTM 30 D226 Felt

GAP ASTM 30 D226 Type 2 is an underlayment product that is manufactured from superior quality organic felt that is saturated with asphalt. GAP ASTM 30 D226 is an underlayment that is applied over the roofing deck before installation of asphalt shingles.

  • ASTM D 226 Type 11
  • Width of roll 36”
  • Roof coverage per roll = 216 Square feet
  • Mass of saturated felt roll = 26 lbs/ 100 sq. ft
  • Mass of saturant = 15 lbs/ 100 Sq ft
  • Mass of desaturated felt (min) = 10.0 lb/100 sq. ft
  • Max ash = 10%
  • Average (min) breaking strength
  • Machine direction (with fiber grain) = 40 lbf/in
  • Across fiber grain = 20 lbf/in
  • Pliability at 77F when bend 90 degrees = ¾” radius
  • Max. loss on heating at 221F = 4%
  • Pallet size = 42” X 48”
  • No. of rolls per pallet = 25