Cavity Wall Insulation
Professional cavity wall insulation across the South West & South Wales by Smart Loft 365. Free survey.
What Is Cavity Wall Insulation and Does Your Home Need It?
The majority of homes built in the UK after 1920 were constructed with cavity walls — two layers of brick or block with a gap, or cavity, running between them. This cavity was originally intended to prevent moisture from penetrating the inner wall, but it also happens to be one of the most significant sources of heat loss in a property. Without insulation to fill that gap, warm air circulates within the cavity and escapes, leaving your home colder and your heating bills higher than they need to be.
How Cavity Wall Insulation Works
Cavity wall insulation works by filling the gap between the two layers of your external walls with an insulating material — typically mineral wool fibre or expanded polystyrene beads — that significantly reduces the amount of heat that can pass through. The process is carried out by drilling small holes into the external wall at regular intervals, injecting the insulating material through these holes, and then neatly filling and repointing the drill points once the work is complete. The result is a warmer, more thermally efficient home with no visible change to its external appearance.
How Much Could You Save?
The potential savings from cavity wall insulation are significant. For a typical semi-detached home, properly installed cavity wall insulation can reduce annual heating bills by between £100 and £300 per year. For larger detached properties the savings can be even greater. Combined with other insulation measures such as loft insulation and underfloor insulation, the cumulative impact on your energy bills can be substantial — making cavity wall insulation one of the most cost-effective home improvements available.
Professional Cavity Wall Insulation Across the South West & South Wales
Smart Loft 365 provides professional cavity wall insulation installations for homeowners throughout the South West of England and South Wales. Whether your cavity walls have never been insulated or you suspect your existing insulation is no longer performing as it should, our experienced team will assess your property and deliver a solution that makes a real and lasting difference.
Is Your Home Suitable?
Not all properties are automatically suitable for cavity wall insulation — the condition of the existing cavity, the exposure of the property, and the type of construction all play a role in determining suitability. That's why every Smart Loft 365 project begins with a thorough, free survey. Our team will inspect your property, assess the cavity, and give you an honest, straightforward assessment of whether cavity wall insulation is the right solution for your home.
What to Expect From Smart Loft 365
Once suitability has been confirmed, our installation team will carry out the work with minimal disruption to your home and daily routine. The process is typically completed within a single day, the drill points are tidied and finished neatly on completion, and you'll be left with a noticeably warmer and more energy-efficient home. We work cleanly, efficiently, and always to a high standard of finish.
Book Your Free Cavity Wall Insulation Survey Today
If you're based in the South West of England or South Wales and want to find out whether your home could benefit from cavity wall insulation, get in touch with Smart Loft 365 today. Our free, no-obligation survey is the perfect starting point — and a warmer, more affordable home could be closer than you think.
Our other services
View all services
Trusted by our customers
.svg)
Good work done
"Good work done, came on time and clean up after each day. Ryan gives advice and explains what they need to do, I would recommend the company with the professional polite workers."
Totally trustworthy
"Work carried out by competent workers who kept me informed throughout my project clean and tidy and totally trustworthy Luca and the team work hard to finish on time."
Would definitely recommend
"Amazing service, all advice given, no pressure, very prompt, very clean and tidy, very quick, very reasonably priced, all very polite, kept up to date at every stage, photos and videos of entire job."
We cannot thank you enough
"Ryan and team Kerian absolutely blew us away. I cannot put into words just how amazing they were. Completely eradicated all our fears. We cannot thank you enough. Thank you."
Thoroughly recommended
"Their comms were excellent and they turned up on the day they agreed and were finished within the estimated time. Kieran and his team were superb."
High quality workmanship
"Great communication throughout. Work was completed on schedule, and although unexpected repair work was required no further charge was made on top of the quote."
I felt I was in safe hands
"Ryan explained everything so well and was always available. I would whole heartedly recommend. I'm hoping they will undertake some roof repairs for us in the near future."
Highly recommend
"All round excellent experience. Very professional and friendly team. Ryan explained from start to finish how the work would be done. A big thank you to Ryan for keeping in touch."
Great job and service
"Great job and service from start to finish. Ryan explained what was to be done and gave a very reasonable quote. His team Shane & Jake carried out the work to a high standard."
Great job done!
"Very competitive quote, efficient work carried out by a friendly and trustworthy team. Work completed within two days, all waste cleared and removed from site."
I had a great experience
"Ryan was knowledgeable and helpful, and the installation team was professional and efficient. They carefully explained everything and left the site spotless."
Very professional
"Ryan was very professional and knowledgeable and work was carried out on time and to a high standard, there service is excellent and would recommend them to anyone."