New Build Charter Square

This new build block of residential flats in Staines upon Thames, required a waterproofing membrane to the main roof and terraces.

Product brief:

Following a discussion with the client, Proteus Waterproofing specified a Cut to Falls Scheme with a range of Proteus Waterproofing products to satisfy the range of criteria, including Cold Melt®, a low odour cold applied membrane and Pro-Living® green roof.

Main Roof

Proteus Pro-Felt® was applied to the main roof area. Where the podium area was a large open space and a safe environment, Proteus Hot Melt® was used, incorporating Proteus Pro-Therm XPS Plus to meet the required U-Value. To meet building regulations a Pro-Living® green roof was installed, providing ecological benefits. Proteus Waterproofing worked closely with the Proteus Approved Contractor to ensure the project was completed to a high standard.


As the terraces were located within a confined space and to prevent the use of hot works on site our Cold Melt®, a low odour cold applied inverted roof waterproofing system was used to ensure all health and safety requirements for the project were met. Due to the low threshold Proteus Pro-Therm VIP, a high-performance vacuum sealed insulation panel was used to overcome this.

Long Term Performance

Incorporating recycled rubber crumb and organically grown products, Cold Melt® creates an elastomeric, seamless, cold applied waterproofing membrane. Cold Melt® system can include inverted roof insulation and, with or without insulation, can be designed as a paved, ballasted, green or brown roof. The membrane does not become brittle with age, is BBA Certified and is manufactured in the UK.

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