B4
BS8102:2022
Structural Waterproofing
Type A, B, C waterproofing per BS8102. Basement conversions and below-ground structures.
Failure consequence: Flooding + legal claims
Materials
Certified products
| Product | Manufacturer | Certification | Application |
|---|---|---|---|
| Newton 508 cavity drain membrane | Newton Waterproofing | BS8102 Type C · BBA 14/5126 | Type C cavity drain waterproofing for basements |
| Sika SikaProof A+ cementitious tanking | Sika UK | BS8102 Type A · BBA approved | Type A barrier waterproofing — internal and external |
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