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Rated 5 out of 5 stars

From beginning to end all the different teams were very professional, punctual and polite. We were kept well informed during the whole process. The quality of the work was first class. The house now l... See more

Rated 5 out of 5 stars

We have had a five star positive experience with Rockwarm all around. They have done such a beautiful and professional job with the external insulation on our home. Apart from their beautiful workma... See more

Rated 5 out of 5 stars

I had a very positive experience with Rockwarm and the external wall insulation installation. The team was reliable, hardworking, and kept me informed throughout the whole process. They completed... See more

Rated 5 out of 5 stars

Rockwarm professional/punctual From the enquiry/quote/various trades i.e. plumbers/electrician/the application process they were all polite/professional/punctual/tidy. Kept myself informed along t... See more

Company details

  1. Insulation Contractor

Written by the company

We are a family run business based in Nuneaton, Warwickshire - with over 40+ years of successful trade in the Insulation sector (Est 1983). We install External Wall Insulation and render on old / solid wall houses and also install cavity wall and loft insulation too. We pride ourselves on delivering a first class installation with excellent customer care.


Contact info

4.7

Excellent

TrustScore 4.5 out of 5

66 reviews

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Replied to 100% of negative reviews

Typically replies within 24 hours

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Rated 5 out of 5 stars

Reliable and friendly

Rockwarm were a reliable and friendly business. They were clear on communications and the job. Kept me in the loop throughout the project.

My house looks incredible from the work they done. I’m very impressed with the work and the team. Even the clean up after was in detail.

July 11, 2025
Unprompted review
Rated 5 out of 5 stars

I have been really pleased with the…

I have been really pleased with the service and the results from Rockwarm who were highly recommended. The service is professional and the quality of the work is also first class. Having this done has also made a big difference to the warmth of my home.

December 17, 2025
Unprompted review
Rated 5 out of 5 stars

Highly recommended

From my first contact with Rockwarm until the job was completed, I have been very impressed. Every member of staff is professional & efficient & the work was completed to a very high standard.

December 20, 2024
Unprompted review
Rated 5 out of 5 stars

Fantastic service

Fantastic service, I have used Rockwarm for external insulation on our main home, and a rental property.

The results are superb, and the aftercare from the team is outstanding.

Couldn't recommend more.

December 17, 2025
Unprompted review
Rated 5 out of 5 stars

Rockwarm were incredibly helpful- they…

Rockwarm were incredibly helpful- they sorted everything from start to finish-scaffolding, gutters & fascias. The work was completed promptly with minimal disruption & my neighbours were notified by Rockwarm as a courtesy. I would highly recommend them!

December 17, 2025
Unprompted review
Rated 1 out of 5 stars

Green algae growing up front of house

Green algae growing up front of house, emailed and fobbed off with a guy number who could rectify meaning we have to be out of pocket. 25 years guarantee this does not exist.
Stay clear
Shocking

December 13, 2025
Unprompted review
Rockwarm logo

Reply from Rockwarm

Hello Lorna - as I mentioned in my email to you yesterday, all render systems need a degree of aftercare and general maintence to keep the appearance nice. We offer an aftercare brouchure to all our customers so that they know how to treat any build up of algae or general staining which can occur due to dense greenery in the vicinity and general pollution from high traffic & busy roads. If you treat the green stains as soon as it starts to appear with an antifungicidal wash and soapy water, then it resolves the issue. Unfortunately you have let it build up over the 6 years since you had the EWI installed and hence its now going to take a bit more work and treatment to get the render clean again. You will find that all EWI systems do NOTt include treatment of algae staining in their 25 year warranty as it is seen as the customers responsibility to maintain their property in terms of low level cleaning or even repainting. Im disappointed that you are trying to damage our reputation and implying shoddy workmanship, for something that we are not responsible for.

Rated 1 out of 5 stars

avoid

tbh, i wouldn't even give them 1 star.. i would ignore their 25 year warranty for starters.. my mother in law had this done, and now there is green algae type staining and you can see all the little round fasteners that they used showing through the finish.. we have emailed them, and they have put it down to lots of traffic and lots of trees!!! even though it's a quite road and not many trees in the local vicinity.... aftercare is non existent

December 16, 2025
Unprompted review
Rockwarm logo

Reply from Rockwarm

Hello Mark - as I mentioned in my email to your partner Lorna, all render systems need a degree of aftercare and general maintence to keep the appearance nice. We offer an aftercare brouchure to all our customers so that they know how to treat any build up of algae or general staining which can occur due to dense greenery in the vicinity and general pollution from high traffic & busy roads. If you treat the green stains as soon as it starts to appear with an antifungicidal wash and soapy water, then it resolves the issue. Unfortunately you have let it build up over the 6 years since you had the EWI installed and hence its now going to take a bit more work and treatment to get the render clean again. You will find that all EWI systems do NOTt include treatment of algae staining in their 25 year warranty as it is seen as the customers responsibility to maintain their property in terms of low level cleaning or even repainting.

Rated 5 out of 5 stars

ROCKWARM rocks pure and simple !!

On a revisit (absolutely nothing that was their fault) the same two guys that did all my insulation and loft November 2024 returned and I can’t thank them enough Both very professional courteous and they just didn’t hang about
I’m more than happy with everyone at Rockwarm I’ve come into contact with
The lovely ladies who deal with the public too are equally great Nothing too much trouble
I recommend this company 100%

Bosses of Rockwarm take note

You have a brilliant team treat them well They are all well worth it
I’m not naming any specifically by name just in case I forget one but you all know who you are
I am so grateful thanks

April 28, 2025
Unprompted review
Rated 5 out of 5 stars

Excellent service from day one

Excellent service from day one. The communications with the office were spot on. The crew was at work half an hour before they were due to start, and did not stop until they went home. They cleaned up every day after themselves.
I am very happy with the final result and would highly recommend this company and its product.

November 19, 2024
Unprompted review
Rated 5 out of 5 stars

We could not fault the excellent…

We could not fault the excellent service we received from Rockwarm.
The two men who did the bulk of the work never stopped, they worked really hard in all weathers and were very approachable, also the young man who replaced all the Down pipes, guttering etc.
The sales team kept us informed at every step and took great care that all our requests were followed, such as colour etc.
If I could give them more than five stars I would.

August 19, 2024
Unprompted review
Rated 5 out of 5 stars

Professional family busines

A couple of houses in my area used Rockwarm for their insulation and I spoke to them and they both confirmed that they were very happy with the quality of the work and I have to say they did look really nice. The workforce were excellent and were supervised at every stage of the work, and it looks amazing. My house is certainly warmer in the winter time. I would certainly recommend Rockwarm as they are a small family business who are second to none.

October 18, 2023
Unprompted review
Rated 5 out of 5 stars

Everything about the whole experience…

Everything about the whole experience was perfect. The men who actually did the work were polite and efficient and very expert, leaving the site immaculate every day when they had finished. The people at the Rockwell office were also very efficient and pleasant to deal with. The external insulation has definitely helped keep our house both cooler and warmer depending on the season. A really worthwhile investment. Would definitely recommend.

August 18, 2023
Unprompted review
Rated 5 out of 5 stars

Highly recommend

Really good work carried out quickly and effectively. Has made a difference to the heating bills and keeps the house cooler in the summer.

July 5, 2024
Unprompted review
Rated 5 out of 5 stars

Fantastic Job

Fantastic Job my house looks amazing
Work carried out in a timely manner
And the girls in the office were very efficient with updates
Would highly recommend this company
Lovely family business
Thank you too you all

August 17, 2023
Unprompted review
Rated 5 out of 5 stars

We had a wonderful experience with Rockwarm

We had a wonderful experience with Rockwarm. They were very friendly & helpful right from our first phone call about their product. They came & explained every detail step by step & true to their word when dates were given to us for various jobs leading up to installation they arrived on time.
We had a wonderful man David who actually did the wall insulation .His work was a credit to him. Every day when he finished he would sweep up & leave every where tidy.
Finished job has transformed our home thank you Rockwarm for your wonderful service.
We highly recommend Rockwarm.

August 17, 2023
Unprompted review

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