Use this 3 part SimpleSpecs™ master specification to specify cold fluid-applied waterproofing for use on below-grade walls and decks where it will be covered by soil or other construction.
Waterproofing is a moisture-curing urethane that is applied by roller, spray, or squeegee to concrete, masonry, or plywood substrates. This type of waterproofing cannot be left exposed to weather.
Since it is applied in fluid form this type of waterproofing forms a continuous, seamless barrier against water penetration.
This waterproofing requires a protection course to prevent damage during backfilling and placement of overlying construction. A drainage course applied over the waterproofing reduces hydrostatic pressure, thereby reducing the possibility of leaks. Some drainage boards can also act as the protection course.
Some widely used cold fluid-applied waterproofing materials are prone to failure involving water absorption. These products meet the standards of ASTM Specification for High Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane for Use with Separate Wearing Course (C 836). Experienced investigators of waterproofing systems are familiar with this failure mode; some refer to the convoluted appearance of a membrane after water absorption as “braining.”
Our investigation into this mode of failure examines the properties of waterproofing materials and application methods. This report includes the results of testing with four different application methods, and varying conditioning periods. Testing included immersion in water at 50 °C (122 °F).
Test specimens absorbed more water than allowed by the Canadian General Standards Board’s (CGSB) standard Membrane, Elastomeric, Cold-Applied Liquid, for Non-Exposed Use in Roofing and Waterproofing (CAN/CGSB-37-58).
Associated Reference:
Related SimpleSpecs™ master specifications:
07 13 13 – Bituminous Sheet Waterproofing
07 14 13 – Hot Fluid-Applied Waterproofing