MIL-PRF-3135H, PERFORMANCE SPECIFICATION: DECK COVERING UNDERLAY MATERIALS (18 SEP 2008)

MIL-PRF-3135H, PERFORMANCE SPECIFICATION: DECK COVERING UNDERLAY MATERIALS (18 SEP 2008)., This specification establishes the performance requirements for deck covering underlay materials to be applied over primed or unprimed, clean steel and aluminum interior deck surfaces on naval vessels in order to provide a smooth, level, and/or properly sloped surface over which a final deck covering system will be applied. Deck covering underlay materials should be of the following types, classes, and grades as specified (see 6.2): Type I – Standard weight underlay materials for use under trowel applied deck coverings (such as MIL-PRF-24613). b. Type II – Standard weight underlay materials for use under pre-formed deck coverings (such as porcelain tiles, vinyl tiles, sheet vinyl, etc.). c. Type III – General use, ultra-lightweight underlay materials weighing no greater than 4.88 kilograms per square meter (1.0 pound per square foot) at a thickness of 6.4 millimeters (0.25 inch). d. Type IV – General use, lightweight polymeric underlayment materials weighing no greater than 7.81 kilograms per square meter (1.6 pounds per square foot) at a thickness of 6.4 millimeters (0.25 inch) that perform the functions normally provided by separate primer, underlayment, waterproof, and crack suppression membrane materials in one single, trowel, or spray applied product. a. Class 1 – Latex base underlay materials; b. Class 2 – Resin base underlay materials; a. Grade A – For use onboard submarines; b. Grade B – For general shipboard use.