Rafter insulation in Cornwall
Homes and buildings across Cornwall can book rafter insulation, starting with a free survey and a fixed written quote.
Towns we cover include Redruth, Falmouth, St Austell, Truro and Camborne.
Where we work around Cornwall
Council areas covered: Cornwall and Isles of Scilly.
Postcode areas: EX, PL and TR.
| Councils | Cornwall and Isles of Scilly |
|---|---|
| Postcode areas | EX, PL, TR |
| Towns listed | 13 |
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.
- Rigid insulation between the rafters, joints taped
- Insulated plasterboard lining where specified
- Build-up designed for your type of roof underlay
Why book with us in Cornwall
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.
We measure before we quote
Existing depth, joist spacing, wiring and the tank are checked, not guessed.
No pressure selling
You get everything in writing and decide in your own time.
How much does rafter insulation cost in Cornwall?
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 England
In England, a loft insulated across more than half its area should reach a U-value of 0.16 W/m²K. Insulation alone is not usually notified to building control. How the rules work across the UK.
Questions about rafter insulation in Cornwall
Which council covers my address in Cornwall?
Councils in Cornwall include Cornwall and Isles of Scilly. Your council matters for building control questions and some funding schemes.
How do I book a survey in Cornwall?
Send the form or call us. We call back to agree a time and confirm it in writing.
Can I use the loft as a bedroom after rafter insulation?
Insulation alone does not make a loft habitable. Fire escape, stairs, floor strength and headroom all come into a conversion, which needs building control.
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.
