Room-in-roof insulation in Cardiff
We fit room-in-roof insulation for homes in Cardiff and across South Glamorgan, starting with a free survey and a fixed written quote.
That includes addresses in CF10, CF11 and CF24, inside the Cardiff council area.
Where we work around Cardiff
Nearby, we also cover Penarth, Trowbridge (South Glamorgan), Barry and Cowbridge.
| Postcode districts | CF10, CF11, CF24, CF5 |
|---|---|
| Council area | Cardiff |
| County or area | South Glamorgan |
What is room-in-roof insulation?
Most rooms-in-roof are reached by stripping the existing plasterboard on the slopes, fitting insulation between and over the rafters, and re-boarding. Where there is access behind the knee walls, we insulate the eaves voids and the floor behind them too. More about room-in-roof insulation.
- Eaves voids insulated where accessible
- Insulation to slopes, knee walls and flat ceiling
- Boarding and finishing as agreed on the quote
Why book with us in Cardiff
Photos of the finished loft
You see the work done without climbing the ladder.
Clear contact details
Your quote says who to call with questions before, during and after the work.
Plain-English advice
We explain what we find in plain English, and say so when nothing needs doing.
Fixed written price
The price on the quote is the price you pay. It only changes if you change the job, or if we find something hidden, such as rot, and you agree the change in writing first.
How much does room-in-roof insulation cost in Cardiff?
Part of this work can be zero-rated as energy-saving materials until 31 March 2027, and part is standard-rated. If VAT applies, your quote shows which is which.
Building regulations in Wales
Wales has its own Approved Document L. Insulation alone is not normally notified, but conversions need building control. How the rules work across the UK.
Questions about room-in-roof insulation in Cardiff
Can a landlord in Cardiff book work for a tenanted house?
Yes. We can arrange access with the tenant directly and send you photos once the work is finished.
Will I get a written quote for work in Cardiff?
Yes. Every quote is in writing with the work, the price and what is included, so you can compare it properly.
How soon can you visit a home in Cardiff?
We call you back to agree a time that suits you, and confirm the date in writing. Availability changes week to week, so we will give you the earliest slot we have.
Will the room get smaller?
Slightly. Insulated plasterboard over the rafters takes a few centimetres off each slope.
Can it be done without removing the plasterboard?
Sometimes the flat ceiling and eaves voids can be reached from behind. The slopes almost always need the boards off to insulate them properly.
