Water Ponding Test For Roof

Proper design installation and maintenance of roofing structures can prevent.

Water ponding test for roof. A ponding test is done by sealing up all drainage exits in the area and flooding the entire area with 1 3 inches of water. Ponding water can have major negative consequences regardless of the type of roofing system. Flood the area being tested with potable water to a minimum depth of 1 25mm to a maximum depth of 4 100mm at the low point of the test area. Slope the ratio between the measures of the rise and the horizontal span.

Ponding water is defined as the water which remains on a roof 48 hours or longer. We apply an even layer of static pressure on the internal layer without exceeding the hydrostatic head maximum amount of water pressure that can be held without leaking or breaking of the external layer to test the integrity of the water repellant barrier. Soffit the finish on the underside of a roof overhang. This translates to an added live load during testing of 101 34 kg m 2 20 76 psf.

The test may be carried out for a period of 24 72 hours depending on the situation. Parapet the part of the wall entirely above the roof. In this test a piece of the roof coating is used as the bottom of a cup and the amount of water that passes through this assembly is measured. Water may accumulate on a low slope roof due to rain snow or runoff from rooftop equipment.

The first is astm d1653 test method for water vapor transmission of organic coated films. Often something as simple as a clogged drain can cause serious pooling on a flat roof. Astm e1105 and aama 501 2 test methods are good overall methods commonly used to test exterior walls sloped glazing and shallow pitched roofs to help identify leak sources. If water is pooling on your roof the first place to look is at the drainage system.

First astm d6083 the governing specification for acrylic roof coating has certain minimum laboratory requirements related to ponding water. However astm d5957 specifically states the standard is not intended for use on building roofs astm d5957 references a maximum water depth of 100 mm 4 in. It is commonly referenced as the standard for flood testing roof systems. The slope of the roof is significant.

Ponding the collection of water in shallow pools on the roof surface. The mean water depth should not exceed 2 1 2 65mm. Start by looking for plugged drains. Plug and drain to check for leaks around the plug and drain installation before proceeding with the full test.