Certainfil Cavity Insulation

"Used John for our cavity wall insulation removal and refill . His team worked efficiently and zero mess . Really nice helpful lads . Totally professional work carried out with no hassle , can’t recommend these guys enough , thanks John"

"Had cavity wall insulation done last year, having had a previous company tell me there was nothing wrong with my insulation Johnny knew from the get go that we had very old, wet, wool type insulation. Johnny and the team were very quick at assessing, removing and installing new cavity insulation in the whole house, as well as recommending other work that needed carried out to ensure we got the best possible outcome from all insulation. The team were very easy to work with, and left everything neat and tidy afterwards. 100% recommend this company, even if its a job they can't carry out they are more than happy to point you in the right direction. Thanks again to certainfil, fantastic job, very happy customer."

"We had cavity wall insulation fitted in 2023. In our first year after making the investment we noticed our home was much warmer through the winter and our oil bills have definitely reduced. The work was professionally and quickly carried out. Looking forward to this winter being warm and snug!"

"We recently had Certainfil extract and replace the cavity wall insulation in our home in Carrickfergus. Johnny initially completed the property survey and was very knowledgeable and professional. He has over 30 years experience and it showed !! Having sought quotes from a number of providers, Certainfil were not only competitive on price, they are also highly experienced. The team were friendly and professional, carrying out the job with minimal fuss and disruption. They came up with a solution to work around our shed which we couldn’t get moved to give them full access to one of our external walls. Nothing was too much trouble. They cleared up as they went and did a great job. The difference in the heat retention within our house is really noticeable. 5 star job !! I would highly recommend."

"Thanks so much to John and his team for the recent insulation work to our house. I got quotes from 7 different companies and John was by far the most professional. He did a thorough review of the loft and external walls and gave great advice. Other companies did video calls or requested pictures to quote which led them to not give me the right recommendations or overpriced quotes.Cost wise he is also very reasonable. His team were very knowledgeable and polite when completing the work, cleaning up after they were done. Almost 2 weeks on, we can feel the difference in the temperature of the house. We had only moved into our house 6 months ago but we're constantly putting the heat on much more than our last property. Now we aren't putting the heating on as frequently which is great and rooms are holding heat! Highly recommend Certainfil. Thank you so much!"