PART_L
Approved Document L + FHS 2026
Thermal & Energy
Insulation, airtightness, thermal bridging. Future Homes Standard 2026 changes U-value requirements significantly.
Cost of failure: £3,000–£8,000 remediation + delays
Materials
Certified products for PART_L
| Product | Manufacturer | Certification | Lead time |
|---|---|---|---|
|
Kingspan Kooltherm K107 100mm PIR
λ = 0.020 W/mK · density 35 kg/m³ |
Kingspan | BBA 95/3091 · UKCA | 7d |
|
Celotex GA4000 100mm PIR
λ = 0.022 W/mK · ozone safe blowing agents |
Celotex | BBA 04/4151 · UKCA | 5d |
Packages
Deal packages including PART_L
Tier 1
Single Part Compliance Pack
£150
48h turnaround
- Certified product schedule
- UKCA / BBA certification references
- Supplier contact details
- Approved Document clause references
- 48-hour turnaround
Tier 2
Full Compliance Schedule
£350
48h turnaround
- Multiple Parts covered (B/E/L typical)
- Building control ready documentation
- BREEAM Mat credit references
- Multiple supplier options compared
- Installation specification notes
- 1 revision included
Tier 3
Premium Compliance with Quotes
£600
48h turnaround
- Full multi-Part schedule
- Supplier quotes obtained
- Gateway 2 ready documentation
- BREEAM credit mapping
- Future Homes Standard alignment
- 2 revisions included