Rafter insulation in Gelligaer
For rafter insulation in Gelligaer, tell us a little about the loft and we will arrange a free survey and a fixed written quote.
That includes addresses in CF82, CF81 and NP12, which fall under Caerphilly council.

Where we work around Gelligaer
Gelligaer sits about 12 miles from Newport (Gwent), measured in a straight line.
Nearby, we also cover Blackwood, Caerphilly, Tredegar and Risca.
| Postcode districts | CF82, CF81, NP12 |
|---|---|
| Council area | Caerphilly |
| County or area | Gwent |
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. It earns its place when you need a warm loft. More about rafter insulation.
- Build-up designed for your type of roof underlay
- Vapour control layer where the design needs one
- Rigid insulation between the rafters, joints taped
Why book with us in Gelligaer
Clear contact details
Your quote says who to call with questions before, during and after the work.
No pressure selling
You get everything in writing and decide in your own time.
Plain-English advice
We explain what we find in plain English, and say so when nothing needs doing.
We measure before we quote
Existing depth, joist spacing, wiring and the tank are checked, not guessed.
How much does rafter insulation cost in Gelligaer?
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 Gelligaer
Do you take on jobs outside Gelligaer?
Yes. We also work in Blackwood and Caerphilly and elsewhere in Gwent.
What do I need to do before you arrive in Gelligaer?
Clear a path to the hatch and, if you can, move stored items away from the area we will be working in. Tell us about anything heavy or fragile.
How do I pay for work in Gelligaer?
Payment terms are set out on your quote. We never ask for payment on the doorstep or in cash.
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.
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.
