Mineral wool EWI · Somerset
Mineral wool external wall insulation in Bath
Homeowners and landlords in Bath can get a free survey and a fixed written quote for mineral wool external wall insulation, covering BA1 and the surrounding area. For homes in Bath near busy roads, mineral wool's sound reduction can be a reason to choose it.
- Free survey in BA1 and nearby
- Guide price from £125 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.
What you get
- Vapour-open, so moisture in solid walls can dry outwards
- Better sound reduction than foam boards
- Finished in mineral or silicone render, or brick slip
- Heavier than EPS, so more fixings and careful handling
Homes and walls in Bath
Surveys in Bath also cover the surrounding BA1 district and towns such as Trowbridge and Kingswood. 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.
On blocks and taller buildings in Bath, mineral wool is the default because of the fire guidance for external walls.
- Postcode district
- BA1
- County or area
- Somerset
- Nation
- England
- Nearby
- Trowbridge, Kingswood, Mangotsfield, Frome
England: planning and regulations
Planning in Bath follows England's national rules: similar-looking finishes on houses are usually permitted, while flats, commercial premises, conservation areas and streets under an Article 4 direction need an application.
Insulating or re-rendering more than half of a wall's area brings in Part L of the Building Regulations, so building control is notified and the wall is upgraded to about 0.30 W/m²K where practical.
On residential buildings with a storey 11 metres or more above ground, guidance points to non-combustible external wall materials, and combustible materials are banned in relevant buildings 18 metres and over, so we specify mineral wool systems there.
Is mineral wool required on my building?
For most two-storey houses it's a choice rather than a requirement. In England, regulation 7(2) bans combustible materials in the external walls of 'relevant buildings' 18 metres and over, and the Approved Document B guidance also covers residential buildings with a storey at 11 metres or more. Wales has its own amended rules, and Scotland restricts combustible cladding on buildings with a storey more than 11 metres above ground. We specify mineral wool wherever these apply and confirm the system's fire classification in writing.
Mineral wool external wall insulation prices in Bath
| Item | Guide price | Notes |
|---|---|---|
| Mineral wool + mineral or silicone render | £125–£170 per m²0% VAT | Excluding scaffold |
| Mineral wool + brick slip | £195–£260 per m²0% VAT | Heavier slip systems need extra fixings |
| Three-bed semi, full house | £11,800–£20,2000% VAT | 80–100 m² of wall, including scaffold |
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
Tell us about the property
Use the quote tool or form, or call. Photos help.
Free survey
We measure, check the walls and confirm approvals.
Fixed written quote
System, details, access, exclusions and VAT in writing.
Installation
Scheduled for suitable weather, with a clear programme.
Mineral wool EWI in Bath: questions
Can mineral wool EWI have a brick finish?
Yes. Brick slips can be bonded over mineral wool systems designed for them, with additional fixings for the extra weight.
Does mineral wool get wet?
It is water-repellent and protected by the render system. Like any insulation it must not be left exposed to rain during installation, so boards are covered and work stops in wet weather.
Is mineral wool needed for a bungalow?
Rarely for fire reasons. It may still be chosen on a damp-prone solid wall where a vapour-open build-up is wanted.
Do you cover Bath?
Yes — we survey and quote mineral wool external wall insulation in Bath (BA1) and nearby Trowbridge, Kingswood and Mangotsfield, with a fixed written price before any work starts.