Surveyroof Ltd - Flat Roof Surveys/Leak Detection

Surveyroof offer unbiased non-destructive Roof Condition Surveys, Flat Roof Surveys, Electronic Roof Leak Detection and Integrity Testing on new or existing flat roof and other structural non conductive waterproofing membranes Nationwide. (SINGLE PLY, FELT BUR, ASPHALT, LIQUID APPLIED, HOT MELT)

We are able to provide superior detection of all waterproofing defects utilising testing methods for wet or dry conditions across the UK. 

Often referred to as the “wet test”, this method is ideal for use on any flat or low-pitched roof to identify defects in exposed membrane or ballasted systems without the need to remove ballast (loose stone chippings, paving slabs, landscaped).

This test is performed in wet conditions (rainfall) or with a hosed down wetted test area.

Method

A pulse generator emits pulses with a voltage of 40V which are conducted onto the roof structure via a wire ring circuit. Since all roof membranes are more or less non-conducting, the electrical pulse chooses a path across the moisture to where the leak is located and then flows over the damp roof in all directions to reach the ring circuit.

We can now determine the currents direction of flow and trace it back to its source. This source is exactly the spot where moisture is penetrating the roof membrane.

Often referred to as the “dry test”. This method is ideal for use on any flat or low pitched roof to identify defects in exposed membrane systems allowing for a quicker testing schedule identifying defects such as pinholes and punctures.

This test can only be performed in dry conditions

Method

The detector delivers, via a phosphor-bronze brush, a stabilised D.C. output voltage across the non conductive waterproofing membrane under test. Detection of defects is by an audible tone and a visual spark from the search electrode (brush)

As part of the Roof Condition Survey and Electronic Flat Roof Leak Detection Survey, all laps, welds, seams and roof detail are physically tested and checked using a blunt end, hand held roofing probe to ensure all welds are bonded and watertight as the wet/dry testing methods have limitations in these areas of the membrane.

A full visual inspection of the roof areas under test is also undertaken to ensure that there are no issues with areas that do not come under the remit of the ELD surveys such as cappings, brick and/or metalwork.

Other trades, who are also on the roof area at the time and after completion of the test, are documented to ensure that any physical or mechanical damage to the membrane can be attributed and identified.

Inspection Camera Surveys allows us to easily perform visual inspections in any hard to reach areas such as wall cavities and roof voids.

Images can be viewed on a high visibility LCD monitor and if required recorded onto CD to form part of the report.

The Ultrasonic Leak Detector allows us to identify leaks around glazing seals, metal profile and standing seam roofs and roof penetrations.