Cosyinsulation Reviews 

512
TrustScore 4.5 out of 5

4.7

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

Evaluating 72 reviews, reviewers overwhelmingly had a great experience with this company. Customers consistently praise the professionalism and efficiency of the service, noting that work is completed on time and to a high standard. The staff, including the installation crews and sales team, are frequently highlighted for being friendly, helpful, and respectful, ensuring a positive interaction from start to finish. Reviewers also appreciate the tidiness of the work, with many mentioning that the teams clean up thoroughly after themselves, leaving no mess. However, some customers also noted issues with post-installation services, specifically regarding the BER assessment process which was described as unhelpful. There were also isolated instances where rubbish was left behind in the attic or an engineer failed to arrive for a scheduled appointment, indicating a lack of communication.

What people talk about most

Service

Consumers find service to be positive, with many reviewers highlighting the professionalism and efficiency of... See more

Staff

Customers had positive experiences with staff, consistently praising their professionalism, efficiency, and... See more

Reviews shaping this summary

Rated 5 out of 5 stars

Amazing service !! Very quick to answer phones, reply to emails & callbacks. Had a very pleasant consultation which was quick and within budget. They live up to their name as the work done was on tim... See more

Company replied

Rated 5 out of 5 stars

We had freezing attic that makes our house cold , we constantly put turf on our range to keep the house warm. Then your crew came to spray insulation in our attic, they were very hard workers and ve... See more

Company replied

Rated 5 out of 5 stars

Overall very happy with the purchase - the install crew were top notch - flexible - explained everything - hard working - clean - knowledgeable, i have noticed a noticeable improvement in the heat... See more

Rated 5 out of 5 stars

From the time Richie came out to see our home. His whole mannerism and professionalism was second to none. He explained in great details about the SEAI grants which we did not avail of. We saved th... See more


Company details

  1. #14 of 19 best companies in Insulation contractor

Written by the company

Kingspan Synthesia insulation is the most energy efficient and environmentally friendly insulation on the market. It offers an eco friendly form of home insulation, with a lifetime guarantee. We work throughout the UK and Ireland.


Contact info

4.7

Excellent

TrustScore 4.5 out of 5

512 reviews

5-star
4-star
3-star
2-star
1-star

Asks customers to review

This company invites their customers to review, whether positive or negative

Replied to 100% of negative reviews

Typically replies within 1 week

How this company uses Trustpilot

See how their reviews and ratings are sourced, scored, and moderated.

4.7

All reviews

(512)

61 reviews in the last 12 months

Write a review
Companies on Trustpilot aren't allowed to offer incentives or pay to hide reviews. Reviews are the opinions of individual users and not of Trustpilot. Read more

Rated 1 out of 5 stars

Poor Communication

I initially requested a quotation and was impressed by how promptly the company scheduled an engineer’s visit. Unfortunately, despite taking an hour off work (at my own expense) to accommodate the appointment, the engineer failed to arrive at the agreed time. Later, I received a call from a representative informing me that the engineer had shown up one hour later and was surprised I wasn’t there. I had already returned to work.

At no point did the engineer or the company notify me of any delay.

This experience highlights a serious lack of communication and coordination. I expected a more professional service and am disappointed by the poor standard provided.

22 July 2025
Unprompted review
Cosyinsulation logo

Reply from Cosyinsulation

Hi Sinead. I apologise for the poor service you have experienced. We pride ourselves on punctuality and as you can see from our other reviews, this is an isolated incident. We have spoken to the surveyor that was late visiting your property and it seems he was held up and has apologised profusely for this. None the less, you should have been made aware of this so that arrangements could have been made. Customer care and efficiency is of upmost importance to us and we will strive to continue to uphold this standard the best we can. Apologies once again.

Rated 5 out of 5 stars

we are very happy

we are very happy. the people are very professiannols and always available to speak with you at anytime you need.

16 July 2025
Cosyinsulation logo

Reply from Cosyinsulation

Thank you Matteo. Glad you are happy with the work.

Rated 4 out of 5 stars

Very professional and the man that…

Very professional and the man that gave the quote was very pleasent and easy to talk to and explained every thing and gave you the best option to suit your situation

16 July 2025
Cosyinsulation logo

Reply from Cosyinsulation

Thank you for your feedback.

Rated 4 out of 5 stars

Very easy to deal with this company to…

Very easy to deal with this company to organise the attic to be insulated. Friendly staff. Only negative was the guys doing the actual insulating left all the rubbish up in the attic when they were finished, all the plastic packaging, otherwise I would have given a 5 star review.

23 May 2025
Cosyinsulation logo

Reply from Cosyinsulation

Hi Amelia. Apologies that some rubbish was left in your attic. The crew in question have been spoken to, to ensure this doesn't happen again. We called you to make arrangements to get this cleaned for you but it had already been cleaned up. We are pleased that everything else went well for you and thank you for your kind review.

Rated 5 out of 5 stars

They did what they said they would do…

They did what they said they would do on time and in a very professional, friendly manner. I would highly recommend Cosy insulation and will be going back to them for my solar panels soon.

16 July 2025
Cosyinsulation logo

Reply from Cosyinsulation

Thank you for your kind review

Rated 5 out of 5 stars

Great experience

Great experience! Delighted with the work carried out on our home. The difference it’s make is extremely impressive.

10 June 2025
Cosyinsulation logo

Reply from Cosyinsulation

Hi Nigel. Thanks for the great review. Glad you are seeing a great difference.

Rated 5 out of 5 stars

Arrived on time

Arrived on time. Very clean job. Couldn't believe how tidy and fast it was. Definitely recommend to anyone.

10 June 2025
Cosyinsulation logo

Reply from Cosyinsulation

Hi Carmel. Thank you for your kind words.

Rated 5 out of 5 stars

Definitely Recommend

Company were a pleasure to deal with from 1st call to the office to installation. Work carried out quickly & cleanly. First time heating turned on after installation installed we had to turn the thermostat down. Delighted as I struggled to heat up my sitting room in particular but no longer. Also happy with the cost.

31 March 2025
Cosyinsulation logo

Reply from Cosyinsulation

Thank you very much for taking the time to leave us this review.

Rated 5 out of 5 stars

Excellent service

Lads where really nice, no airs and graces just got the job done. Very professional and clean and tidy.

6 March 2025
Cosyinsulation logo

Reply from Cosyinsulation

Hi Sinead. Thanks for the great review

Rated 5 out of 5 stars

Happy happy happy.

Once I made the enquiry, with in 48 hours l received a phone call from your sales team member Gareth, he got me a rough idea of the cost, l was happy with this so we arranged for him to visit and do all testing and measurements, he then worked out a total price. We set a date for work to be done.
On the day of the work, 2 men arrived on agreed time had a talk with us and they got to work.
They were very quiet and very tidy at there work and showed lots of respect to us and are home.
When they had finished they asked me to have a look at there work and if I was happy, l couldn't believe how tidy they had been, l asked then if they had time for a cup of coffee, but they had another job to go to.
100% happy,
Thank you, Jimmy McClenaghan

25 April 2025
Cosyinsulation logo

Reply from Cosyinsulation

Hi Jimmy. Thank you for the very detailed review. We appreciate it.

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.

Take a closer look