

Drag the slider to compare the transformation.
External Wall Insulation Specialists
Warmer home. Lower bills. Stunning transformation. External wall insulation from specialists you can trust.
Cold walls. Condensation. Higher energy bills. Rooms that never seem to feel properly warm.
These are often signs that your home is losing heat where it should not. In older properties, the right answer may be external wall insulation. In cavity-wall homes, or where most of the heat is escaping through the loft, another improvement may be the better option.
Before spending money, it is worth making sure you are solving the right problem. That is why Rockwarm looks carefully at where the heat is escaping and helps you choose the improvement that makes the most sense for your home.
Compare the options, then book a survey if you would like help choosing the best next step for your home.
The result
Rooms feel warmer and more comfortable, without that cold-touch feeling.
Keeping heat in for longer can help reduce the energy needed to warm your home.
External wall insulation can also give older brickwork a cleaner, more refreshed appearance.

Our signature service for solid-wall and hard-to-heat homes. It reduces heat loss, tackles condensation, and transforms the outside of the property at the same time.

A fast, cost-effective solution for suitable cavity-wall properties. Ideal when you want a practical thermal upgrade without changing the appearance of the house.

Often the quickest win for energy savings. A straightforward way to stop heat escaping through the roof and improve comfort throughout the home.
Genuine feedback from Rockwarm customers.
“Best investment for our startup”
We deployed AI agents that automated our entire workflow overnight. The autonomous execution is exactly what we needed.
“Exceeded all expectations”
The AI agents handle complex decisions while we sleep. Our team's productivity has increased tenfold since we started using it.
“Game changer for our team”
Orchestrating intelligent workflows used to take weeks of manual work. Now our AI agents handle everything autonomously.
“Worth every penny”
Building and deploying AI agents is incredibly simple. Our automation runs 24/7 without any human intervention.
“Our secret weapon”
The autonomous AI workflows give us a competitive edge. Tasks that took hours are now executed automatically in minutes.
“Incredible developer experience”
Deploy, orchestrate, automate. The platform makes building intelligent AI agents straightforward and powerful.
Recent before-and-after projects from Rockwarm installations across the Midlands.


Drag the slider to compare the transformation.


Drag the slider to compare the transformation.
Step 1
We visit your property, assess your walls, and talk through the options. No charge and no obligation.
Step 2
You receive a detailed written quote with everything included and no hidden extras.
Step 3
Scaffolding up, insulation fitted, and render applied. Most projects take around two to three weeks.
Step 4
Warmer, quieter, cheaper to run, and transformed from the outside too.
Anim aute id magna aliqua ad ad non deserunt sunt. Qui irure qui lorem cupidatat commodo. Elit sunt amet fugiat veniam occaecat fugiat.
Consectetur vel non. Rerum ut consequatur nobis unde. Enim est quo corrupti consequatur.
Quod possimus sit modi rerum exercitationem quaerat atque tenetur ullam.
Ratione et porro eligendi est sed ratione rerum itaque. Placeat accusantium impedit eum odit.
We have been doing this since 1985, with thousands of homes completed across the Midlands.
We use Rockwool insulation and K Rend silicone render rather than lower-grade alternatives.
You get honest advice and clear information, then the space to make your own decision.
No subcontractors. The people on site are employed by Rockwarm, which means clear accountability.
Private installation is often faster, better specified, and more straightforward than grant-led schemes.
Helpful posts, articles, and guides on energy saving solutions including insulation, K Rend finishes, condensation, and choosing the right improvement for your home.
Complete guide to K Render installation. What it is, how much it costs, colour options, and whether it's right for your home. From installers with 40 years experience.
Realistic external wall insulation costs for 2025. What affects the price, typical ranges by property type, and how to avoid overpaying. From installers with 40 years experience.
External wall insulation costs thousands. Is it actually worth it? We break down the real costs, savings, and benefits - honestly, including when it might NOT be worth it.
Take a look at the services, see examples of our work, or book a free survey and we will talk you through the best option for your home.
Based in Nuneaton, we work across Coventry, Nuneaton, Birmingham, Warwickshire, the West Midlands, and surrounding areas within roughly 30 miles.
Read genuine feedback from Rockwarm customers, judge whether the company feels right to deal with, then move into the right service page or free survey when trust is no longer the blocker.
No obligation and no pressure, just honest expert advice from a team that has been improving Midlands homes for over 40 years.