B2
BS8485 + BR211
Radon Sumps & Vent Systems
Sub-floor ventilation, radon sumps, pipe penetration seals. Complete gas protection system.
Failure consequence: Incomplete system = building control rejection
Materials
Certified products
| Product | Manufacturer | Certification | Application |
|---|---|---|---|
| Wrekin Geocell radon void former | Wrekin Products | BBA approved void former system | Sub-floor void former for radon and gas ventilation |
Packages
Brownfield deal packages
Tier 1
Brownfield Gas Protection Pack
£200
48h turnaround
- Contamination class to membrane mapping
- Specific certified product
- BBA certificate reference
- Supplier contact (Delta / Proctor / ITP)
- CIRIA C735 compliance summary
Tier 2
Full Brownfield Materials Schedule
£450
48h turnaround
- B1 + B2 + B3 + B4 materials covered
- NHBC LQ03 ready documentation
- Multiple supplier comparisons
- Installation sequence notes
- 1 revision included
Tier 3
Brownfield Premium with Remediation
£700
72h turnaround
- All B1-B6 categories
- Remediation material specification
- Contaminated fill classification advice
- Specialist contractor shortlist
- 2 revisions included