#43 GAP Organic Base Sheet

GAP 43# Organic Base Sheet D ASTM 2626-04  is manufactured from superior quality felt that is saturated with asphalt and then coated on both sides with weathering grade coating asphalt and then covered on top with mineral surface fines to prevent sticking in the roll. It is a Florida Building Code Approved product.

    Product Use

    GAP organic base sheet is applied over the flat roofing deck or insulation before the application of Build-Up Roofing systems.

    Technical Data

    D ASTM 2626-04

    • Width of Roll 36”
    • Roof coverage per Roll= 216 Square feet
    • Mass of Base Sheet = 37.0 lbs/ 100 ft sq
    • Mass of Asphalt Saturant = 7.2 lbs / 100 ft sq
    • Mass of desaturated felt = 5.2 lbs / 100 ft sq
    • Mass of Coating and surfacing (min) = 18.0 lbs/ 100 ft sq
    • Mass per side of asphalt coating (back coating) = 3.5 lbs/ 100 ft sq
    • Saturation efficiency (min) by weight = 70%
    • Breaking Strength at 77F (min)
    • Machine direction = 35 lbf/in
    • Cross Direction = 20 lbf/in
    • Water Vapor Permeance = 0.3 grains/ hr. ft sq (in. Hg)
    • No. of Rolls per Pallet = 25

    Florida Building Code #

    • FL # 14449.1
    • Miami Dade Approved: Yes

    Documents

    Download Printable Documents

    Manufacturing Location

    Pryor, OK