Rafter insulation in Cardiff
Homes in Cardiff get the same service as everywhere else we work in South Glamorgan. For rafter insulation, that means a free survey and a fixed written quote.
We cover the CF10, CF11 and CF24 postcode districts. The local authority is Cardiff.
Where we work around Cardiff
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 rafter insulation?
Because the whole roof slope, the gables and the party walls now have to be insulated, this costs much more than insulating the floor and saves less heat for the money. We check the roof underlay first: a breathable membrane and a felt with no ventilation gap need different build-ups to avoid condensation. More about rafter insulation.
- Insulated plasterboard lining where specified
- Build-up designed for your type of roof underlay
- Rigid insulation between the rafters, joints taped
Why book with us in Cardiff
We measure before we quote
Existing depth, joist spacing, wiring and the tank are checked, not guessed.
Plain-English advice
We explain what we find in plain English, and say so when nothing needs doing.
No pressure selling
You get everything in writing and decide in your own time.
Photos of the finished loft
You see the work done without climbing the ladder.
How much does rafter 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 rafter insulation in Cardiff
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.
Can you visit Cardiff outside working hours?
Ask about early, late or weekend appointments when you get in touch, and we will tell you honestly what we can offer.
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.
Is insulating between the rafters better than the loft floor?
Not for saving energy alone. Insulating the floor heats less space and costs far less. Rafter insulation is the right answer when the loft itself needs to be warm.
Will it cause condensation?
It can if the build-up is wrong for the roof. Old bitumen felt needs a ventilation gap behind the insulation; a modern breathable membrane may not. We check before we design it.
