Rockwool cavity closer systems have been developed to minimise thermal bridging at door and window reveals in cavity wall constructions. Rockwool Ltd can now offer a solution for both first-fix built-in (Rockclose) and second fix (RockReveal) applications. Both systems are fire rated and exceed the minimum requirements of Thermal Robust Details.

Rockclose provides the user with a fire rated cavity closer for masonry walls with a returning inside leaf. It consists of a strip of glass tissue faced semi-rigid Rockwool insulation bonded to a black polyethylene dpc.

The product is designed to be installed, as work proceeds, between the facing brickwork and closer blockwork prior to fitting of window and door frames. It is self-supporting for ease of installation and yet resilient enough to allow for cut irregularities in closers.

RockReveal is a fire rated cavity closer, which can be used in timber, metal and masonry cavity walls without the need to return the blockwork.

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