Solid wall insulation · Somerset
Solid wall insulation in Bath
From Bath to Trowbridge, we price solid wall insulation after a measured survey — no guesswork, and no work starts until the price is agreed in writing. On solid-walled houses in Bath, the gable or the most weather-exposed wall is often the place to start.
- Free survey in BA1 and nearby
- Guide price from £75 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Bath
Postcode, service and a phone number is all we need.
Part of every quote
- Internal insulation suits single rooms or where the outside can't change
- Breathable options for stone and lime-mortared walls
- In England and Wales, Building Regulations apply when more than half of a wall is treated
- Both can be done in stages, elevation by elevation or room by room
Bath: walls, weather and approvals
We cover Bath and nearby Trowbridge, Kingswood and Mangotsfield. The South West has many stone and solid-walled cottages, exposed coastal properties and a share of post-war system-built houses, including types such as the Cornish Unit.
Exposure to wind-driven rain varies across Somerset: sheltered town streets fare better than walls on high ground or facing the prevailing weather, and the render, beads and cill details are chosen with that in mind.
For solid-walled homes in Bath, we check wall thickness and age first to confirm there's no cavity to fill.
- Postcode district
- BA1
- County or area
- Somerset
- Nation
- England
- Nearby
- Trowbridge, Kingswood, Mangotsfield, Frome
Planning and building control in England
For a house in Bath, external insulation or render is often permitted development if it looks similar to the existing walls; conservation areas, flats, commercial buildings and listed buildings need permission or consent, so we check your address first.
If the work covers more than half of a wall, or a quarter of the building's whole envelope, it counts as renovating a thermal element, with a target of about 0.30 W/m²K where feasible.
External or internal — which is better?
External insulation keeps the wall warm, reduces cold bridging at floors and party walls, renews the outside, and doesn't shrink rooms — but it changes the look and needs scaffolding. Internal insulation keeps the façade unchanged and can be done room by room, but loses 50–100mm of floor space per wall and needs careful detailing to avoid condensation at joists and corners.
Solid wall insulation prices in Bath
| Item | Guide price | Notes |
|---|---|---|
| External (EWI) | £105–£210 per m²0% VAT | By board and finish |
| Internal (IWI) | £75–£130 per m²0% VAT | Plus making good |
| Survey and written recommendation | Free with a quote |
Confirmed by a fixed written quote after survey. 0% VAT: installing insulation in a home is zero-rated until 31 March 2027, so these figures are the total; 5% applies from 1 April 2027.
From enquiry to finished wall
Get a guide price
Try the online quote tool for a ballpark figure.
Book the survey
A visit at a time that suits you.
Agree the quote
Nothing starts until you've signed the written price.
We do the work
Planned around weather, with you kept informed.
Solid wall insulation in Bath: questions
Does solid wall insulation cause condensation?
It can if detailed poorly, particularly internally. A condensation risk check for the proposed build-up and careful detailing at joists, reveals and corners avoid it.
Can I get a grant for solid wall insulation?
Some schemes cover it for eligible households — for example ECO4 until 31 December 2026, Home Energy Scotland's grant and loan, Wales' Warm Homes Nest and NI's Affordable Warmth Scheme. Each has its own eligibility and installer rules; see our grants guide.
Is solid wall insulation worth it?
For many solid-walled homes it's one of the biggest single improvements to comfort, because the walls are often the largest heat-loss area. Savings depend on the home and heating, so we don't promise a figure.
Do you cover Bath?
Yes — we survey and quote solid wall insulation in Bath (BA1) and nearby Trowbridge, Kingswood and Mangotsfield, with a fixed written price before any work starts.