• In areas outlined in BRE document ‘Radon’ guidance on protective measures in new dwellings.
• When gas protection is required across the footprint of the building.
• Crossing cavity wall constructions to maintain gas barrier integrity.
• Forming internal perimeter trays to allow membranes continuity.
• Collars for service pipe protrusions.
• Following a risk assessment where the requirement is for a good gas protection measure against radon, carbon dioxide (CO₂), methane and hydrocarbons.
• To be designed and installed in a continuous system around the whole building perimeter.

A range of rigid top hat collars for sealing to a gas barrier and at the intersection of pipe projections.

Features and benefits:

• Preformed mouldings eliminate the need for site fabrication to prevent errors through poor workmanship.
• Easy to handle, tough, durable and puncture resistant.
• Can be used for multi-storey or high-loading applications – will not extrude under high loads up to the point of compression failure of wall.
• Wide range of standard components with special tailor made accessories also available.
• Fully itemized scheduling service.
• Flexible top hat collars also available, specified separately.

Quality:

• Manufactured to BS EN ISO 9001 and BS EN ISO 14001.
• Satisfies all NHBC requirements.
• Meets BRE requirements.
• Complies with Building Regulation Approved Documents C1 and C2.
• Meets all relevant British Standards.