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Yes, with our Dec Scanner we are able to provide a full moisture map of your roof, this forms part of our condition report survey.

Yes, all sites from CS2 up to CS6 require independent verification, clarity on this can be found in BS8485:2015+A1:2019 and CIRIA C735. It is important to understand that planning consent is dependent on fulfilling the independent verification process, failure to do so could result in planning discharge issues.

The SuDS Manual, (CIRIA C753) the UK’s guidance document for SuDs and Attenuation systems states that third party integrity testing should be undertaken.

Chapter 30 of the SuDS Manual states:

Leakage can occur due to poor field or factory seaming, or damage caused during or after installation. It is important that all joints and seams are visually inspected and tested on site to ensure they meet the required standards.

The Environment Agency recommends that conflicts of interest in verification should be avoided. A contractor or membrane supplier certifying their own work or product is considered to be a conflict of interest and is not good practice.

Yes, it is arguably more important to get the waterproofing element of blue and green roofs tested as they are then covered by the blue or green element. Discovering a leak after installing and having to remove the sedum or attenuation system is very disruptive and expensive.

LABC Warranty Technical Manual V11 — Section 11.9.3: Blue Roofs

GRO Green Roof Code — Section 3.3.1: Waterproofing Inspection

GRO Green Roof Code — Installation section: Waterproof covering to be tested and approved before works begin

LABC Warranty Technical Manual V11 — Section 11.7.4: Green Roofs

Basic protection consists of a radon membrane that extends across the footprint of the structure, including bridging any cavities.

Full protection also consist of a membrane as above but also includes ventilation or a radon sump. Further information is available in BR211 from the Building Research Establishment (BRE).