Top Hat Units – Reliable Sealing for Service Penetrations
Top Hat Units are manufactured from tough black polyethylene, purpose-built to provide a secure, airtight seal around service pipe entries through gas membranes. Designed for durability and ease of use on site, they help ensure compliance with Building Regulations Part C (C1 & C2) and form a key part of any ground gas protection system.
Each unit comes with a heavy-duty metal jubilee clip for fast, secure installation.
Key Benefits for Contractors:
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Preformed design saves time on site and eliminates errors from on-the-fly fabrication
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Flexible yet highly durable, resisting punctures, deformation, and wear
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Suitable for high-load applications, including multi-storey developments
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Compatible with a wide range of gas membranes
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Custom sizes and accessories available to suit site-specific requirements
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Full scheduling service available to streamline procurement and planning
Typical Applications:
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Ground gas protection as outlined in BRE radon and gas guidance
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Sealing pipe penetrations to maintain membrane integrity across the footprint
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Use in cavity wall transitions and perimeter trays
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Effective against radon, methane, CO₂, and hydrocarbons
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Ideal for use where robust gas protection is specified
Top Hat Units are a trusted solution for ground gas installations, helping professionals deliver compliant, long-lasting results with minimal hassle.
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Sizes Available
Various
