Warmer walls. More comfortable homes.

Heat Halo is a specialist thin-wall insulation system for solid-wall properties — helping rooms warm faster, stay warmer for longer and reducing cold-wall problems without losing valuable space.

At just 2mm thick, it helps improve wall surface temperatures without the disruption and loss of space associated with conventional insulation systems.

Heat Halo is designed to help create warmer, more comfortable rooms while reducing the conditions that can lead to condensation and mould.

For homeowners

I own a solid-wall home.

Find out if Heat Halo is the right answer for your property — and how the cost compares with replastering, redecoration and traditional internal wall insulation.

Internal wall insulation for solid-wall homes → For Social Housing Providers

Cold walls. Condensation. Repeat complaints.

A targeted £2,995 intervention for problematic cold walls in occupied social housing — housing association, local authority or ALMO stock.

Social Housing Cold Wall Programme →

Independent performance evidence

Measured. Verified. Here's what it shows.

Build Test Solutions Ltd tested Heat Halo under BS EN ISO 9869 — the standard for in-situ measurement of real-world wall performance — with an untreated control room on the same wall throughout.

16% Reduction in heat loss through the treated wallMeasured U-value improvement
~28% Lower measured heat loss than the untreated control wallPost-installation comparison
+2–3°C Average increase in internal wall surface temperatureMeasured during the BTS test
~25% Typical improvement for an average solid-wall homeTypical 2.0 → 1.5 W/m²K equivalent

A construction system — not a paint.

Heat Halo is spray-applied in controlled layers by trained specialist contractors, then finished with a sprayed plaster skim. Performance comes from the system as a whole: survey, preparation, controlled application to a defined coating thickness, skim finish and installation quality — not a tin and a roller.

Read about the evidence →

Independently tested under BS EN ISO 9869 in a live occupied property. See the full methodology →