Isotherm Insulation Installation
Isotherm recycled PET (plastic bottle) insulation installed across South Wales. A safe, non-itch, eco-friendly alternative to mineral wool with excellent thermal and acoustic performance.
Independent, evidence-based surveys
Isotherm is made from 100% recycled polyester (PET plastic bottles). It contains no glass fibres, no formaldehyde and no chemical irritants, which means it can be handled without gloves, masks or itchy skin, and is safe to install in occupied homes.
We supply and install Isotherm across South Wales for loft insulation, internal wall insulation, between joists and within stud walls. It performs as well as glass mineral wool for thermal insulation and significantly better for acoustic insulation.
Ideal for allergy-prone households, families with small children, and anyone who wants a cleaner, greener, low-allergen insulation upgrade.
Why choose Isotherm
Non-itch & safe
No glass fibres, safe to handle bare-handed with no PPE required.
Recycled content
Made from 100% recycled plastic bottles, eco credentials matter.
Acoustic performance
Excellent for soundproofing floors and stud walls.
Hypoallergenic
No irritants, ideal for allergy sufferers and children's rooms.
Won't slump
Holds its shape long-term, unlike some mineral wool products.
Easy to retrofit
Cuts cleanly, friction-fits between joists and studs.
Book your isotherm insulation quote today
Honest diagnosis from a local independent surveyor. No sales, no pressure.
Why independent surveys matter
We don't sell treatments, chemicals, or remedial work. That means our only job is to find the truth and explain it to you clearly.
We've installed Isotherm in lofts, floors, stud walls and ceilings across South Wales, we know how to detail it correctly.
Pair Isotherm with raised loft boarding for warm, quiet, allergy-friendly storage space.
Honest quotes, if mineral wool would suit your project better and save you money, we'll say so.
Inspection → Testing → Report
Survey
Measure the area, check joist or stud spacing and existing insulation.
Install
Isotherm cut to length and friction-fitted, no fasteners required in most cases.
Finish
Vapour control where needed, all offcuts removed, site left clean.
Surveys tailored to South Wales
We install Isotherm across Bridgend, Cardiff, Swansea, Newport, the Vale and the valleys.
Particularly popular for South Wales families upgrading children's bedrooms, home offices and converted lofts where acoustic performance matters as much as thermal.
Get an honest answer about your property
- 100% independent, we don't sell remedial work
- Detailed written report with photographs
- Calibrated equipment and clear evidence
- Local surveyor, same-day response