Internal Wall Insulation in Walsall
For solid wall homes that can't take cavity fill, we insulate from inside — with the careful detailing that stops cold bridges and damp becoming a bigger problem than the one you started with.
If your Walsall home was built before around 1920, there's a good chance it has solid brick walls rather than a cavity — which means the usual cavity wall insulation simply isn't an option. Solid walls lose heat differently, and they need a different fix: internal wall insulation, fitted from inside the room rather than injected into a gap that doesn't exist.
Why solid walls need a different approach
A cavity wall has a gap between two skins of brick that can be filled with insulation from outside. A solid wall is just that — solid — so there's no cavity to fill. Left alone, solid walls let a lot of heat escape and tend to run cold on the inside surface, which is why older properties often feel draughty and expensive to heat even with modern boilers and double glazing.
How internal wall insulation works
We fix insulated plasterboard or a built-up insulation and lining system to the inside face of external walls, then finish it ready for redecoration. It sounds straightforward, but the detailing is where jobs go right or wrong — around window reveals, door frames, skirting boards, and electrical sockets, every junction is a place where cold can bridge through or moisture can get trapped if it's not done properly.
Getting the detailing right
We pay particular attention to reveals and junctions, because a poorly detailed edge creates a "cold bridge" — a path for heat to escape and, worse, a cold spot where condensation and mould can form. Getting this right is the difference between internal wall insulation that quietly does its job for decades and one that causes damp problems within a year or two.
What it costs you in room space
Internal wall insulation does take up a little floor area — typically a few centimetres per wall — which is worth knowing before you commit, especially in smaller rooms. We'll talk you through the trade-off honestly during the survey rather than glossing over it.
Funding and next steps
Grant funding can sometimes apply to internal wall insulation for eligible households, in a similar way to our ECO4 loft insulation service — we'll check this as part of the survey. Either way, you get a free, honest assessment of whether your walls are solid, what internal insulation would involve room by room, and a fixed price before any work starts.
If your solid-wall home has always felt harder to heat than it should, this is usually why. Book a free survey and we'll show you what's involved.
How It Works
From the first call to the final sign-off — here's what to expect when you work with us.
Free Survey
We confirm your walls are solid rather than cavity, and assess each room you want insulated.
Funding Check
We check whether grant funding applies to your household before quoting the paid price.
Careful Fitting
Insulation boards are fixed to internal walls with careful detailing around windows, sockets and skirtings.
Ready to Redecorate
The finished surface is left ready for your decorator, with the room fully usable again.
What Our Customers Say
Trusted by homeowners across Walsall — here's what they have to say.
"Our 1900s terrace was always cold no matter what we did to the heating. Internal wall insulation in the two coldest rooms made a real difference."
"They were upfront that we'd lose a bit of room space and let us decide which walls were worth it. No pressure to do the whole house."
"Detailing around the window reveals was neat — no cold strip like we were warned other companies leave behind."
Frequently Asked Questions
Solid walls are common in homes built before around 1920 and are usually thinner than cavity walls when measured at a window or door reveal. We confirm this properly during the free survey rather than guessing from the property's age alone.
It takes up a few centimetres of floor area per insulated wall, which we'll show you room by room during the survey so you can decide whether it's worth it for each space.
Poor detailing creates cold bridges — spots where heat escapes and condensation can form, sometimes leading to damp and mould. It's the main thing that separates a job that lasts decades from one that causes problems within a year, which is why we take particular care with it.
It can, for eligible households, in a similar way to our loft insulation grant schemes. We check this during the free survey before quoting the paid price.
Yes, plenty of homeowners insulate the coldest rooms first rather than the whole property in one go. We'll advise honestly on which walls make the most difference for your budget.
Solid Wall Home That's Always Cold?
Book a free survey. We'll confirm your wall type, check for funding, and give you a room-by-room fixed price.