Flood testing works on is a diverse testing method and can be used on practically all roofing membranes and build ups providing you with solid visual representation.
Flood test roof.
For example roof drains are not designed to be leak free under hydrostatic pressure so it is highly likely they would leak at this location s flashing during a flood test.
What are the effects of major water ingress.
Manufacturers should specify a minimum time period for materials to cure prior to performing flood test however no testing should be performed during the first 24 h following installation of system materials 48 h min if materials are installed at a time when ambient temperatures are below 10 c 50 f.
Care must be taken when specifying flood testing eg.
Will the drainage system take the pressure of release.
Applies for fully adhered or bonded sheet membranes liquid or fluid.
Please feel free to consult with us if you require a flood test.
Astm d5957 98 2013 illustrates a method for testing the water tightness of waterproofing installations applied to horizontal surfaces having a slope of no greater than 20 mm m 2 slope 1 4 per ft.
A membrane integrity test conducted by temporarily plugging or otherwise closing any drains and erecting temporary dams where required to retain water on the surface of a waterproofing membrane and then flooding the surface to a maximum depth of 2 inches at the high point.
Although flood testing can determine the existence of a leak it cannot precisely identify the location even with use of soluble dyes in the water.
Allow the water to remain at this depth for 24 72 hours to make sure that any drains returns or other penetrations are not leaking.
Who monitors it overnight.
The basic process of completing a water test starts with finding a good water source on the building and simply running hoses from the water source to the area of the roof being tested.
Difficulties with flood testing are the time required to fill test and then drain the sometimes tens of thousands of gallons of water required to properly test an area.
Our roofing engineers can carry out flood testing on large and small surfaces so whether you want us to check a house office shopping centre or football stadium for roof or wall leaks we can meet your needs.
Standard guide for flood testing horizontal waterproofing installations.
Flood testing will not provide useful information about the quality of the roof design or installation nor about the durability of the materials used.
To flood test begin filling the pool fountain or vessel with water at the rate of 1 25mm per hour to a depth of 2 to 4 50mm to 100mm.
The roofing contractor will then if needed plug any drains in the area to make sure that water does not drain off the roof during this test.
It may if the depth of water is sufficient indicate whether there is a breach in the membrane but it will not confirm the overall ability of the roof to provide satisfactory service throughout its expected service life.
