What is Internal Wall Insulation?
Internal Wall Insulation (IWI) transforms cold, solid brick Yorkshire properties by adding insulation boards to the inside of external walls. Perfect for Victorian terraces and period homes built before 1930, IWI can improve your EPC rating from E or F to C while eliminating damp, cold spots, and condensation issues.
Our professional installation creates a warm, dry living environment while preserving your property's external character. The process involves fitting rigid insulation boards with vapor barriers, then finishing with plasterboard ready for decoration. Typical installation takes 2-3 days per room with dramatic improvements in comfort and energy efficiency.
Why might you need internal wall insulation?
Yorkshire's Victorian and Edwardian properties often have solid brick walls that create cold, damp, expensive-to-heat homes. If your property was built before 1930, here are the warning signs you need internal wall insulation:
Internal walls feel cold to touch, especially during Yorkshire winters
High energy bills despite heating being on constantly throughout winter
Solid brick construction with no cavity for traditional insulation methods
Property located in conservation area where external insulation isn't permitted
Persistent damp, mould, or condensation forming on external-facing walls
The benefits of internal wall insulation
Internal wall insulation transforms Yorkshire's coldest properties into warm, comfortable homes while preserving their period character. Here's what you gain:
Dramatically warmer rooms requiring 50% less heating to stay comfortable
Preserve your property's original external appearance and character
Cut energy bills by £300-500 annually with improved EPC rating
Eliminate damp, mould, and condensation on previously cold walls
Transforms cold solid-wall rooms, finished ready for decoration
Room Survey & Suitability Check
We assess which walls to insulate, moisture risk, and how to minimise space loss.
Material Choice & Prep
We install insulated plasterboard or batt systems with vapour barriers where needed.
Finishing & Decoration
Walls are skimmed and ready for painting — looking brand new and feeling much warmer.
Rated 4.6 out of 5 on Google by our satisfied clients across the UK, and growing every month.
Fully accredited retrofit installer. Our work meets PAS2030 and TrustMark standards.
Every installation is covered by a third-party insurance-backed guarantee, giving you complete peace of mind.
We'll check your eligibility and provide expert guidance, with no hard sales and no hidden costs.
Areas we cover
Our teams work across the north of England, the Midlands, the East of England and Wales.
- North East
- North West
- Yorkshire and the Humber
- East Midlands
- West Midlands
- East of England
- Wales
Head offices in Beverley and Warrington
Not sure if we cover you? Ask about your areaPrefer to Call?
Mon-Fri 8am-6pm, Sat 9am-4pm
We respond within 2 hours
Head offices in Beverley and Warrington
Covering the North, the Midlands, the East of England and Wales
What Happens Next?
We'll call you within 24 hours to confirm your appointment
Free 30-minute home assessment at your convenience
Instant quote and booking for installation
How much space will I lose?
Typically 50–100mm, depending on the insulation type. We always try to minimise loss.
Can I insulate one room at a time?
Yes — many clients start with the coldest rooms and expand later.
Is it messy?
There is some disruption, but we work cleanly and finish with a fresh plaster skim.
Do you work for councils, housing associations and contractors?
Yes. We deliver internal wall insulation for councils, housing associations and main contractors, from single properties to larger programmes.
Which walls can be insulated internally?
External-facing solid walls, typically in older brick or stone homes. We check for moisture risk first and advise which walls to insulate and how to keep space loss to a minimum.
What areas do you cover?
We cover the North East, North West, Yorkshire and the Humber, the East and West Midlands, the East of England and Wales, from our head offices in Beverley and Warrington.