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Warmer home. Lower bills. Stunning transformation. External wall insulation from specialists you can trust.
Warmer walls. Lower bills. A stunning rendered finish that transforms how your home looks. We've been doing this for families across Coventry, Nuneaton and the Midlands since 1985.
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.
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.
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.
Recent before-and-after projects from Rockwarm installations across the Midlands.


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Genuine feedback from Rockwarm customers.
Read all reviews“Best thing I have ever done”
We have recently moved into a 1920s property and with an older property it came with cracked brickwork leading to cold drafts into the house causing condensation running down the windows. Best thing I have ever done!!!
Yell
“My house looks like a new build”
My house looks like a new build. I have so many compliments from people walking past. We decided to only have the top half done to keep the character of the house and it looks fantastic. Very happy.
Yell
“From start to finish, totally professional”
From start to finish this company have been totally professional. The crews that were on site turned up when they said they would and were very polite, clean and tidy. Just waiting now for the scaffold to come down so that I can admire all their hard work. Would recommend them to anyone.
Yell
“The walls are no longer stone cold”
In regards to insulation you will be happy to hear the walls are not stone cold on the inside anymore and they actually feel warm. We don't have to keep heaters on all night during cold months anymore.
Trustpilot
“Can't praise them enough”
It's a family run business run well. From start to finish good value, hard work, and a pleasant manner. Our house looks great.
Yell
“Communication was spot on”
The communication we received from the office was spot on. We were kept informed if there were any changes. The finish is exactly what we wanted. The guys were very professional and polite. Just need the scaffold to come down so we can show it off!!
Yell
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Book your free survey. No obligation, no pressure — just an honest assessment of the best insulation approach for your home, along with clear advice and a fixed-price quote where appropriate.