Insulation and Retrofit

Explore insulation and retrofit in plain English, with practical context, common distinctions and questions to ask before work starts.

Start with the entries below. They are part of a growing reference library, not an exhaustive technical specification or a substitute for specialist assessment.

Getting into insulation work

Insulation work includes several occupations, from domestic building-fabric improvement to commercial and industrial thermal insulation. These need different materials, access and assessment. A career route should identify the intended sector and teach the complete assembly rather than assume that adding the thickest available product is always a suitable improvement.

Loft insulation

Loft insulation reduces heat flow through the upper part of a building, commonly by insulating at ceiling level in an unheated loft. Other roof constructions use insulation in different positions.

Last editorial check: 8 November 2026.