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Thornton Consulting have been at the forefront of the Building Leak Investigations industry since being established in the 1980’s and have continually developed a methodical process and techniques for the rapid and accurate identification of the leaks in the building envelope.

Leak investigations follow much the same process for most situations and require testing to various elements of the structure to either confirm the item is a source of the leak, or equally important, to determine that a particular item is functioning as required.

Generally, the first phase of the investigation is to establish the integrity of the roof waterproofing, either by electronic leak detection where the membrane is exposed, or flood test if finishes, such as paving or green roof etc, remains is in place. This will then be followed up bya a variety of other tests, where deemed necessary, to positively establish the source of the leak.

Thornton Consulting were recently appointed to undertake Leak Investigations into to a retail unit in West Sussex where leaks were being experienced beneath an atrium.  An initial electronic test of the waterproofing membrane at the base of the atrium indicated it to be watertight, therefore, additional tests were required elsewhere and were targeted at the glazing.

Ultra-sound testing can be used to locate small air gaps in glazing, in particular where gaps have developed in seals between the glazing and frame. These air gaps are therefore potential water paths into the structure. Due to the large size of the atrium, this was the appropriate test to establish the integrity of the glazing.  The ultra-sound test works by emitting a signal towards the internal face of the glazing.  Externally, a receiver is pointed towards the corresponding area of glazing and an audible alarm is triggered where the ultra-sound signal passes through the glazing system and is detected by the receiver, indicating an air gap.

Where readings were obtained, these were recorded on the surface of the glazing.  A simulated rainfall test was then undertaken to confirm the integrity of the system. Leaks were recreated internally at numerous locations, corresponding with internal leak sites and positively identified the source as inadequate seals between the glazing and frame.

Leak investigations require a dynamic approach and Thornton Consulting’s field staff use their wealth of experience and training to utilise the best test methods to effectively and efficiently determine the source of building leaks.

If you would like further information on our Building Leak Investigation service, please contact our office on 01342 410508, or use the contact form to get in touch.