Buildings can be designed with the best fire protection strategy in mind, but subsequent building works may compromise that safety. 

Service lines installed after fire rated floors and walls are already in place can create gaps and voids that seriously increase the risk of fire spreading, despite the strong initial design. 

Void fillers and fire sealants provide solutions to close any penetrations – restoring the building to its original performance levels.   

Learn how ROCKWOOL products can help ensure all fire-stopping points in your construction are secure.

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Why do we need void fillers and fire sealants?

In both original construction and renovation projects, ensuring the best fire safety levels throughout the entirety of a building’s lifetime is essential. This means achieving compliance with the latest building standards such as Approved Document B in England and Wales. 

Ongoing work, improvements and changes can compromise existing fire rated materials or constructions and plans – with service line penetration or accidental damage on-site just two examples. 

Before a site can be declared fit for purpose, every single fire stopping point needs to be checked to ensure its integrity is intact. Void fillers and fire rated sealants can be used to secure tested gap widths that have appeared, and ensure maximum safety.

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Fire resistant sealant products are designed to improve building safety. Their application can be the difference between a controllable fire and one that causes serious, costly damage – and puts lives at risk. 

The amount of sealant, coatings or penetration fillers required will depend on the size of your building and areas that may be at risk of compromise. Refer to Firestopping Standard Details or contact the Technical Solutions team for guidance.

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Stone wool products can either permanently or temporarily seal penetrations.

Rob Kooiker

ROCKWOOL Group Product Manager
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HVAC Systems Guide

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HVAC Specification Guide

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RockLap H&V Pipe Section Packaging Guide

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Thickness of ROCKWOOL Insulation

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