The Cosy Post.
UK home insulation, with the real numbers.

Insulation materials

Understanding the different insulation board types helps you make informed choices for walls, floors, and roofs. PIR, EPS, phenolic, mineral wool, and wood fibre each have different thermal performance, cost, and use cases.

Guides in this section

Various insulation board types stacked

Insulation board types

PIR vs EPS vs phenolic vs mineral wool vs wood fibre explained. Thermal performance, cost, and which to use where.

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PIR insulation board close-up

PIR insulation explained

What it is, how it performs, brands (Celotex, Kingspan), cost, and when to use PIR vs other materials.

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