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How can I prevent fire entering a cavity wall around window and door openings and subsequently spreading throughout the building envelope?

April 26, 2017building cavity door entering Openings spreading subsequently wall window

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How can I prevent fire entering a cavity wall around window and door openings and subsequently spreading throughout the building envelope?

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Rockwool fire rated cavity closers, Rocklose and RockReveal are designed to provide a tight, fire resistant seal in a masonry cavity around window or door openings. Rocklose is a first fix solution which is similar but narrower product to Rockwool Acoustic Party Wall dpc. RockReveal is a second fix solution which does not need additional dpc. Both products will achieve 30 minutes fire resistance and also meet the Part L requirement for minimising cold bridging.