Can BDAS test waterproofing membranes on ballasted roofs i.e. when a roof membrane is below slabs, stones, etc?

Yes! The major advantage of the "wet" testing method is that there is it is possible to test the roof without removing or disturbing the ballast. Further, testing can be applied to waterproofing membranes on inverted systems - note that the time taken to complete the testing will be appreciably longer than for non-inverted systems. Localised exposure works, dependent on findings, may, of course, be necessary.

Does ponded water beneath waterproofing membranes affect integrity testing or test results?

No! "Wet" and "dry" testing establishes electrical paths to earth (concrete slab, profiled metal decking), and hence moisture access routes. Additional moisture, therefore, serves to improve the conductivity between the membrane and earth.

Does steel reinforcing within concrete slab decking affect integrity testing or test results?

No! Again, additional, or improved, conductivity serves to improve testing.

Can EPDMs and other conductive membranes be tested?

Yes! Standard "wet" and "dry" testing cannot be used. However, BDAS is at the forefront of UK technology and non-destructive testing and can test for relative moisture beneath conductive materials. Moisture plots (2-D and 3-D) are used to signal the presence of moisture across areas and pinpoint ingress location.

In light of recent legislation (Building Regulations), can BDAS test for environmental and ecological parameters?

Yes! BDAS will test for direct heat loss via thermographic inspections (both still and video versions) and for indirect heat loss via air pressure testing.

Can tarmac/asphalt-decking systems, e.g., carparks, be tested in terms of erosion/ablation of the wearing surface.

Yes! BDAS uses the Mechanical Impedance test to highlight localised areas where delamination, is occurring.

What is the life expectancy of roofing felt for a flat roof?

Based on industrial estimates, life expectancy ranges from 5 years to 30 years dependent on the product used. Each manufacturer provides a product guarantee, which should be used as a guide to longevity. BDAS analysis techniques, however, can be used to determine the remaining life span from on-site measurement data.