Solid wall insulation · Hampshire
Solid wall insulation in Portsmouth
From Portsmouth to Gosport, we price solid wall insulation after a measured survey — no guesswork, and no work starts until the price is agreed in writing. For solid-walled homes in Portsmouth, we check wall thickness and age first to confirm there's no cavity to fill.
- Free survey in PO5 and nearby
- Guide price from £75 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Portsmouth
Postcode, service and a phone number is all we need.
What the job covers
- In England and Wales, Building Regulations apply when more than half of a wall is treated
- Solid walls can lose heat roughly twice as fast as an insulated cavity wall
- Breathable options for stone and lime-mortared walls
- External insulation keeps room sizes and treats cold bridges well
What we look for in Portsmouth
We also cover Gosport and Fareham, close to Portsmouth. Portsmouth sits around 15 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.
On solid-walled houses in Portsmouth, the gable or the most weather-exposed wall is often the place to start.
- Postcode district
- PO5
- County or area
- Hampshire
- Nation
- England
- Nearby
- Gosport, Fareham, Ryde, Havant
Planning and building control in England
Before quoting in Portsmouth, we check whether the property is in a conservation area, under an Article 4 direction or listed, because that decides whether changing the outside needs planning permission.
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 Portsmouth
| 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.
How it works
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 Portsmouth: 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 do one wall at a time?
Yes. Many owners start with the coldest or most exposed elevation, often a gable end.
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.
Do you cover Portsmouth?
Yes — we survey and quote solid wall insulation in Portsmouth (PO5) and nearby Gosport, Fareham and Ryde, with a fixed written price before any work starts.