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The water must remain on the deck for a minimum of 24 hours to determine if any water is passing through the system. 5. Monitoring for Leaks

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Understanding ASTM D5957-98: The Definitive Guide to Flood Testing Horizontal Waterproofing

Flood testing adds an immense amount of dead load to a structure. Water weighs approximately .

On highly sloped decks, achieving the required depth at the high point creates excessive depth and weight at the low point. Since you specifically asked for a “free PDF,”

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

It is not recommended for use if freezing temperatures are expected, as ice can damage the membrane or flashings.

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It detects imperfections in the membrane or flashings that are otherwise invisible until after completion.