From noting my requirements on the Bark website GRS contacted me straight away and organised a visit within 24 hours. I received the quotation the same night. I accepted the quotation to go ahead w... See more
While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more
To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more
Review summary
Created with AI, based on recent reviews
What people talk about most
Reviews shaping this summary
Company details
Written by the company
All aspects of home insulation. Boilers Electrical Solar Air Source Heat Pumps
Contact info
United Kingdom
- grsinsulation.co.uk
Asks customers to review
This company invites their customers to review, whether positive or negative
Hasn’t replied to negative reviews
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Reliable cavity insulation company.
Everything went very well. The crew arrived on time to the minute. They worked non stop until the job was completed. I was very happy with the result, and would recommend them to anyone.
We had an insulated flat roof installed…
We had an insulated flat roof installed at our property under a government grant scheme by GRS Insulation. Unfortunately our experience has been very disappointing.
After the work was completed we experienced multiple problems including water coming through a bathroom light fitting, which actually filled with water and caused damage to the ceiling. We also had water entering the boiler cupboard affecting the electrics, which resulted in a power cut and the boiler shutting down leaving the house without heating.
Although engineers attended and carried out some repairs to the roof and restored the electrics and boiler, further problems have continued. Water is now running down the front of the house due to the threshold drainage being too close to the property and is coming in through the front door. There are also still outstanding remedial works inside the property including repainting the damaged bathroom ceiling and replacing the light fitting.
The property is tenanted and there is a vulnerable child living in the home, so these issues have been extremely concerning.
We are currently waiting for the company to provide a proper plan and timescale to fully resolve the problems caused by the installation.
Single brick house,insulation.
Great experiance from start to finish,professional service from start to finish.
Highly recommend.
Polite staff very efficient.
Loft and cavity wall insulation
Straight forward processes, staff always willing to help and.advise.
did a great job on time and explained…
did a great job on time and explained what was being done cleared up afterwards and provided photos of the work
friendly staff both on phone and on site
Very friendly staff
Very friendly staff, an excellent quote and very quick to install. The fitter was very friendly and clean, with no mess left. I cant fault them.
Brilliant service from start to finish!
From the initial contact about a survey, to the survey itself (and several, subsequent and very reassuring chats with Graeme) to the day of the install (can’t remember the two installers’ names but they were both friendly and skilful), GRS were fantastic.
Our EPC said cavity wall insulation (assumed). Turns out it had none! Bonded bead installed today with a 25 year guarantee and we couldn’t be happier. Has made an instant difference to how our home holds onto heat.
Highly recommended!!
They were very professional
They were very professional, and offered a speedy service with minimum disruption and mess.
The team ho came to the house where…
The team ho came to the house where polite and professional
The professionalism of the installers. Would definitely recommend
The professionalism of the installers
Communication and systems need improvement
Communication within the company should be improved among employees. The left hand frequently did not know what the right hand was doing. Information gathering systems were not optimal. We received numerous emails and telephone calls about the same paperwork. There was a lot of unnecessary duplication. Most of all, we were given the wrong information which led to disappointment when the promised improvement could not be carried out.
In January 2025 we were seriously let…
In January 2025 we were seriously let down by an insulation company based in Wolverhampton. After nearly nine months of constant heartache we finally managed to get our money back. We looked around for a local company and were recommended to use GRS Insulation Limited and we have never looked back. They inspected the loft area and advised us on the work to be carried out. They also advised us to approach the local council for a possible grant which was approved. Since day one the company have always been upfront and most importantly honest. The guys who came out and did the actual insulation, installation of the two air vents and loft entrance and boarded area were excellent. Finally to the team in the administration office who were always at the end of the phone if we had any questions and even paid us a visit on a counter of occasions. Thank you one and all for being such a star team.
Friendly and helpful staff
Friendly and helpful staff, arrived on time and seemed to work efficiently but left a lot of brick dust all over wall lights. House feels warmer already!
Finally found a good company
After a year of disappointment with the cavity insulation industry, I finally found a company that were interested in the customers needs, not thier own.
Installers were friendly, knowledgable & very helpful to have a good job completed.
Would certainly recommend against other companies I looked at & used.
Good job by GRS insulation
From the initial assessment of the property to completing the required cavity wall and additional loft insulation, GRS staff were exemplary. Everything was explained and good communication between the office and myself was maintained throughout. Installation was completed in good time and the premises were left in a tidy state. The installation team worked hard and efficiently and were polite and communicative on site. I'm very happy with the work that has been done.
Cavity and Loft Insulation
From noting my requirements on the Bark website GRS contacted me straight away and organised a visit within 24 hours. I received the quotation the same night. I accepted the quotation to go ahead with cavity wall insulation and removal and replacement of loft insulation. The price was very reasonable.
Jason and Ollie arrived as confirmed on the day. Both of them were very hardworking and polite. Even though there were a couple of unforeseen issues with the loft and the job took slightly longer than anticipated the communication from them was great and they kept me updated along the way.
Would definitely recommend.
The Trustpilot Experience
Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.
Companies can ask for reviews via automatic invitations. Labeled Verified, they’re about genuine experiences.
Learn more about other kinds of reviews.
We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.
Learn about Trustpilot’s review process.
Here are 8 tips for writing great reviews.
Verification can help ensure real people are writing the reviews you read on Trustpilot.
Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.







