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Airtight Coating for Durham History Centre


Our client was restoring the Durham History Centre, located in the historic Grade II listed Mount Oswald Manor House. The goal was to turn it into a local history hub, bringing together archive, heritage and registration services at a single location.

In order to protect and preserve the important historical archive, a carefully maintained environment had to be designed and an effective airtightness system installed. Ultimate Coatings Ltd was contracted to install Blowerproof, a BBA-approved water-based polymer liquid airtight membrane, as part of this system.


To meet the strict airtightness requirements required for the project, we applied a three-coat spray-applied system to the interior blockwork walls and structural concrete columns. 

Once the floor and ceiling joints were filled with a fireproof backer and mastic, airtight tape was applied around the joints. UCL then hand-applied a fibre-reinforced coat of Blowerproof over the joints to provide a continuous airtight seal. 

The coating achieved below Passivhaus standards (0.6 air changes per hour), and the client was thrilled with the result. 

project details

Category: Airghtness

Location: United Kingdom




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