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The standard is written for surfaces designed to drain. For slopes exceeding 1/2” per foot, you may need temporary dams to achieve 2-inch ponding.
Before the test begins, the waterproofing membrane and flashings must be inspected and any existing deficiencies repaired. Critical Considerations
If a leak is detected, the test must be stopped immediately. The water is drained, the membrane is allowed to dry, repairs are made, and the entire 24-hour flood test process must be repeated. Summary of ASTM D5957 Technical Parameters ASTM D5957-98 Requirement Less than 1/4 inch per foot (2%) Test Duration Minimum 24 hours Minimum Depth 1 inch (25 mm) at the highest point Maximum Depth 4 inches (100 mm) at the lowest point Key Objective Locate membrane breaches before overburden placement astm d595798 pdf free
Both the waterproofing membrane and all flashings must be fully installed and cured.
, as the water weight can cause structural damage or irreversible membrane harm. The Flood Testing Procedure The standard is written for surfaces designed to drain
: Outline depth requirements and duration for the water test.
The test area is subdivided using temporary containment assemblies, such as wood curbs or plastic barriers. Critical Considerations If a leak is detected, the
: An alternative official source for purchasing individual ASTM documents. ANSI Webstore drafting a project plan for a flood test based on the D5957 guidelines? Tools and Resources to Maximize Your Competitive Advantage
ASTM D5957-98 is the standard guide used to test the water integrity of horizontal waterproofing membranes on slopes less than 1/4 inch per foot (2%). It is commonly applied to plaza decks, green roofs, parking garages, and flat roof assemblies before the installation of overburden, such as soil, pavers, or concrete slabs.
The designation "-98" indicates that this version of the standard was originally approved or significantly revised in 1998. ASTM later reapproved this version, meaning it remained the active guide for testing horizontal waterproofing assemblies on roofs, plazas, balconies, and parking structures for many years. Key Objectives of the Guide
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