
Specialist service
Insulation in South Wales
Improve warmth, comfort and energy efficiency.
What the work involves
Warmer surfaces, fewer cold spots, less moisture on walls.
If a wall or ceiling is colder than the air in the room, moisture will condense on it however well the property is ventilated.
We identify the cold spots during the survey, carry out the insulation work and finish the surfaces ready to decorate.

- Cold spots identified during survey
- Walls and ceilings insulated
- Works with damp and ventilation
- Surfaces finished afterwards
What causes it
The causes we identify on insulation jobs
Poor insulation
The website lists poor insulation as one of the common causes of condensation in a property.
Cold surfaces
Upgrading insulation is one of the tailored solutions we recommend after a free survey.
Our process
How the work is carried out, step by step
01Free surveyA detailed, free survey to establish whether insulation is behind the moisture problem.
02Upgrade insulationWhere insulation is the cause, we carry out the upgrade as part of the recommended solution.
03Honest adviceIf the issue is something you can fix yourself, we will tell you — free of charge.
Need advice on insulation?
Surveys and advice are free.
The detail
What we can confirm about CPH Interiors
- Established in 1984 — over 40 years of experience in damp proofing and home improvements
- Free, no-obligation surveys and advice
- Silicone horizontal barrier injection to form a DPC
- Epoxy resin tanking system, fully sealed before any plaster is added
- NVQ Levels in most skills and CSCS registered
- DBS-checked annually
- 100% positive feedback on My Builder, also listed on Rated People
- Discounts for verified NHS, Ambulance, Fire Brigade and Police staff (excluding management)
- Serving Tonyrefail, Bridgend, Cardiff and South Wales
- Payments accepted by cash, BACS and cheque
Our other specialisms
All specialist services