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ISO-THERM Thin Internal Wall Insulation for UK Homes
Warm up cold external walls, cut condensation, and save space across Dorset & Hampshire.
Cold Walls And Condensation Solved
If rooms feel chilly and you spot black mould or damp patches, the wall surface is likely too cold and hitting condensation. ISO-THERM thin internal wall insulation raises the surface temperature so moisture can’t settle, giving warmer rooms and cleaner paintwork.
It’s ideal for solid-walled homes, flats, bay windows, and cold external walls where space is tight and full-depth insulation isn’t practical.
Expect a neat, space-saving upgrade that pairs perfectly with good ventilation for lasting results.
How ISO-THERM Works And Where It Helps
ISO-THERM acts like a thermal barrier, lifting internal surface temperatures to reduce the risk of condensation and mould growth. The result is a room that heats faster, feels warmer for longer, and keeps finishes looking fresh.
Typical installation involves a damp survey, prep, fixing the ISO-THERM liner or board, jointing or skim, then decorating—usually with minimal disruption.
Best placements include:
External walls behind sofas or beds
Window reveals and bay returns
North-facing rooms and ground-floor walls
A Thin Layer With A Big Warmth Upgrade
Give your rooms an instant comfort boost without losing space. ISO-THERM Thin Internal Wall Insulation is a slim, tidy lining that makes cold walls feel warmer, helps stop condensation, and keeps paint looking fresh.
Feels warmer fast: lifts wall warmth so rooms feel cosy, not clammy
Keeps the cold out: reduces those cold spots that invite damp and mould
Slim but mighty: only a few millimetres, so you keep your floor space
Quick, clean fit: neat install over existing walls, then we redecorate
Helps with energy use: a warmer surface can mean gentler heating and better EPCs
FREQUENTLY ASKED QUESTIONS
Will ISO-THERM Thin Internal Wall Insulation fix condensation and mould on internal walls?
SO-THERM raises wall surface temperatures, which helps prevent condensation and the black mould that follows. For persistent issues, we pair insulation with ventilation upgrades or damp repairs so the finish stays clean and dry long-term.
Do I need damp proofing or ventilation work before ISO-THERM Thin Internal Wall Insulation?
If we find penetrating damp, leaks, or heavy condensation, we’ll fix the moisture source first. Insulation works best when the wall is dry and sound, and combining ISO-THERM with condensation control gives the most reliable outcome.
Can ISO-THERM Thin Internal Wall Insulation go behind radiators or large furniture?
Yes—these are common cold spots. We can remove and refit radiators, insulate behind them, and redecorate for a tidy result that reduces heat loss and surface condensation.
Will ISO-THERM Thin Internal Wall Insulation lower my heating bills?
By increasing internal surface temperature, rooms feel comfortable at lower thermostat settings and warm up faster, which can reduce heating demand. Actual savings vary by property, usage, and accompanying ventilation/draught-proofing.
Say Goodbye to Chilly Walls
We have helped more than 150 homeowners across Dorset and Hampshire, from Bournemouth and Poole to Southampton, Winchester and Portsmouth. We survey the moisture issue, fit ISO-THERM neatly, and leave rooms warmer, fresher and easier to live in.