Single ply roofing membrane provides watertight finish for Brighton school

ECE Architecture has specified the Sika-Trocal S single ply roofing membrane at a new primary school in Brighton. The system was chosen to create a watertight envelope which would also provide a base for an extensive solar panel installation.

The Brighton & Hove Bilingual Primary School is a purpose built facility which will accommodate 630 pupils. As part of its construction, 2,100m² of Sika-Trocal Type S roofing membrane was installed by specialist roofing contractor, Robertson Roofing and was mechanically fixed with a single, strong and reliable fixing.

To provide a watertight and durable system which was aesthetically pleasing, the Type S system was extended up and across a perimeter parapet ranging from 200 to 600mm high. 

This was resolved by terminating the membrane at the top of the parapet with a 35mm deep Trocal laminated metal box profile mini-kerb to the parapet outside edge. The profile provided a fixing point for a polyester powder coated RAL 7012 aluminium edge flashing, to give the impression that the parapets were capped with a full width traditional aluminium capping detail.

Mike Nicholls of Robertson Roofing commented: “By dressing the Sika-Trocal S membrane up and fully across the top of the parapet we were able to guarantee the long term water tightness of the detail, avoiding the reliance on the originally proposed butt-jointed traditional aluminium full width capping. It enabled us to include detailing within the 20-year guarantee required by the client on this project.”

Sika-Trocal Type S is BBA certified to have a life expectancy in excess of 35 years. The membrane is suitable for mechanically fastened roofs in both new build and refurbishment applications.

Its specification allowed Robertson Roofing to complete the roof to deadline in just three months to the client’s complete satisfaction.

Sika-Trocal,
Watchmead,
Welwyn Garden City,
Hertfordshire,
AL7 1BQ,
United Kingdom

Phone: 01707 394444
Fax: 01707 329129

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