Solid wall insulation · Hampshire
Solid wall insulation in Basingstoke
If you're planning solid wall insulation in Basingstoke, start with a free survey: we measure, check the walls and confirm planning and building control for your address. For Basingstoke homeowners weighing external against internal insulation, the survey sets out both with prices.
- Free survey in RG21 and nearby
- Guide price from £75 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Basingstoke
Postcode, service and a phone number is all we need.
Included as standard
- Both can be done in stages, elevation by elevation or room by room
- External insulation keeps room sizes and treats cold bridges well
- Breathable options for stone and lime-mortared walls
- Internal insulation suits single rooms or where the outside can't change
Local considerations in Basingstoke
We cover Basingstoke and nearby Fleet, Thatcham and Yateley. Basingstoke is about 28 miles from Southampton. Homes across the South East range from inter-war semis and post-war estates, which are mostly cavity-walled, to older solid-walled cottages and Victorian town terraces.
Exposure to wind-driven rain varies across Hampshire: 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 Basingstoke, we check wall thickness and age first to confirm there's no cavity to fill.
- Postcode district
- RG21
- County or area
- Hampshire
- Nation
- England
- Nearby
- Fleet, Thatcham, Yateley, Farnham
Permissions in England
For a house in Basingstoke, 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.
How can I tell if my walls are solid?
Measure the wall thickness at a window or door: about 225mm (9 inches) of brick usually means solid, while 260mm or more often means a cavity. On exposed brick, a pattern with bricks laid end-on (headers) every few courses points to solid construction. Stone walls are usually solid regardless of thickness. Age is a strong clue too — most homes built before the 1920s are solid-walled.
Solid wall insulation prices in Basingstoke
| 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
Enquiry
Send your postcode and a few details.
Measured survey
Walls, damp, eaves, cills and services recorded.
Written price
A fixed price with the specification attached.
Work and handover
Installed, inspected and documents handed over.
Solid wall insulation in Basingstoke: questions
Can I do one wall at a time?
Yes. Many owners start with the coldest or most exposed elevation, often a gable end.
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.
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 Basingstoke?
Yes — we survey and quote solid wall insulation in Basingstoke (RG21) and nearby Fleet, Thatcham and Yateley, with a fixed written price before any work starts.