What to look for
Insulation specialists fit cavity-wall, loft, internal solid-wall, external solid-wall, underfloor, and room-in-roof insulation. The category interacts with grant schemes (ECO4, GBIS, HUG, LA Flex) where eligibility-routed funding accelerates uptake. PAS 2030 and PAS 2035 govern installation and wider-retrofit standards for funded work.
- PAS 2030:2023 installer certification (mandatory for funded work)
- TrustMark registration
- CIGA, KIWA, or BBA-equivalent product certification
- Pre-install survey including ventilation assessment
- Long-term insurance-backed guarantee (CIGA / GDGN)
- Funding-scheme paperwork handled in-house
Typical pricing: £500-£1,200 cavity wall, £600-£1,400 loft top-up, £8,000-£18,000 external solid-wall (UK 2026)
Regulator / certification to look for: PAS 2030:2023, TrustMark, CIGA, KIWA