Which insulation course should I start with?

Cavity wall and loft are most common; solid/internal wall needs PAS 2035 awareness for retrofit contexts.

Insulation Courses in the UK

Insulation is the highest-impact, lowest-cost retrofit measure and underpins ECO4, GBIS and Warm Homes funding. This guide covers the training routes.

Last reviewed: August 2026

Types of insulation training

Cavity wall, external wall (EWI), internal wall, underfloor, loft and cold-roof insulation each have dedicated courses. Some are short upskilling awards for experienced installers.

Demand

Government schemes prioritise insulation for bands D–G. The Great British Insulation Scheme (closed March 2026) and Warm Homes Local Grant keep demand high.

FAQs

Which insulation course should I start with?: Cavity wall and loft are most common; solid/internal wall needs PAS 2035 awareness for retrofit contexts.