Timber frame cavity barriers from Envirograf have been used in the construction of new, timber framed studios and one and two bedroom flats. Situated on the former site of St. Albans’ Oaklands College, this multi-phase project was to both refurbish the existing residential properties and to deliver a new development of residential units.

Envirograf® Product 55 FB/TS (free-air-flow cavity barrier) is being used in the construction of the new, timber-framed second phase of the development. Consisting of 1-metre lengths of non-fibrous sponge faced with an intumescent strip, the barrier is also coated with a protective sleeve, making it fully resistant to condensation and moisture. Usable in both party floors and party walls, the product is incredibly easy to attach, using a high-tack self-adhesive tape affixed to the fixing side.

Product 55 FB/TS has been tested to both BS En 1363-1 1999 and BS476 Parts 20/22 (1987), achieving up to 142 minutes fire resistance and integrity.

This is of particular importance as the product is designed to be used with timber party walls and floors, which are required to offer fire resistance from below matching that of the connected walls. It is of the utmost importance that the product is fitted correctly, and as such it can be easily cut to size to fit smaller gaps or corners.