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R J Insulation

4.9

96 Reviews

Opening Hours
Today - 09:30–19:00
  • Monday 09:30–19:00
  • Tuesday 09:30–19:00
  • Wednesday 09:30–19:00
  • Thursday 09:30–19:00
  • Friday 09:30–19:00
  • Saturday - Closed
  • Sunday - Closed

About

RJ Insulation specialise in ECO friendly, natural and sustainable loft insulation.

Pre 1920 homes.
One of our assessors holds a Level 3 award in giving advice on energy efficiency measures to listed and traditional buildings.

He recommends using the Sheepswool. Sheepswool is hygroscopic, therefore is specified for listed and traditional buildings.

1920 -1960s homes.
For 1920 - 1960s homes we use SuperFOIL Insulation. SuperFOIL is designed to keep you cool in the summer and warm in the winter. SuperFOIL states that it can increase the value of your home.

Post 1970.
For 1970s or later we offer the SupaSoft Insulation. Supasoft is made entirely out of single use recycled plastic bottles. on average it takes 10,000 - 15,000 Single use recylced plastic bottles out of landfill and into your loft. It never degrades and is approximately 11% more thermally efficient than the typical Fibreglass.

We give out a lifetime guarantee for SuperFOIL, Sheepswool and Supasoft

What we do

  • Insulation installers

  • Loft and property converters

    • Loft Insulation
  • Loft Ladders

  • Garden Rooms

  • Conservatories

  • More Services

    • loft boarding
    • loft improvements
    • loft rooms
    • garden office

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

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100% of the reviews we publish have been through our stringent moderation process.

4.9
96 reviews
Customer Service
5.0
Quality
5.0
Value
4.8
Sort by
Sheep’s wool loft insulation
From first contacting RJ Insulation to discuss our options up to the day the insulation was installed, we have been very happy with the service. We dealt with Alfie who was both knowledgeable and helpful and made the whole process feel seamless. The actual installation took place on 27 July just over two weeks from the date we first contacted them. The installers were great and the final finish is immaculate. We are extremely pleased.
Customer in North Yorkshire Posted on 28/07/2026 (Reviewer did not use service)
Foil Insulation
Customer Service
Quality
Value
From the first contact with John and Alfie explaining all my options with absolutely no hard sell, to today when the men came to do insulation. they were courteous and tidy and would have no hesitation in recommending R J Insulation
Customer in Hertfordshire Posted on 10/07/2026 , work completed 10/06/2026
Pros at what they do
Customer Service
Quality
Value
From the calls from Alfie, the Survey and the hard working installers, RJ Insulation has been professional, knowledgeable and curtious throughout, I can’t praise the company enough. I thought I did my research before getting quotes from companies to retro-fit new insulation in our loft conversion, but listening to Alfie took me to another level, I couldn’t find another company who would guarantee their work for the life of the house, my experience with RJ Insulation was a level above the rest even if they weren’t the cheapest I can tell it’s money well spent. My wife was so happy she had her full staircase cleaned as the last action of the installers each day I think this is one thing she’s going to miss. These guys worked through our record breaking heatwave even though I did challenge them on this for their safety. I can feel the difference already in the loft conversion and for the first time I can’t wait for winter.
Customer in Greater London Posted on 06/07/2026 , work completed 26/06/2026
Professional, efficient, friendly
Customer Service
Quality
Value
I needed to sort out the poor energy rating of an old house; insulation was so degraded as to be worthless in terms of heat retention but also revolting to deal with and clean out. RJ and the team explained all the options in detail, leaving me to decide how best to proceed and once the decision was made did the work with efficiency and professionalism. The estimate and survey was undertaken with care as was the work that followed. Everything was left spotlessly clean and all waste was removed. The team were fastidious. Thanks to everyone, from Alfie in the office talking things through, to Lee at survey and to the site team who worked through a heatwave (ironically!) to get everything done.
Customer in Suffolk Posted on 26/06/2026 , work completed 27/05/2026
Friendly, diligent and great result
Customer Service
Quality
Value
This one was pricy and we needed to think a bit before we went for it. Very happy with the results from our roof insulation installation. Max, Linas and co are all very friendly and impressive chaps. They got the job done efficiently, working as long as the job needed to get it done on time, including figuring out some particularly awkward issues from some leftover spray foam (what we were replacing). They made sure they cover every inch of external wall well and helped explain & show how and why they'd done things which was very much appreciated. They also did a great job of ensuring that everything was tidied up when they finished which was really great to see. Excited about having a bit more warmth this winter! Thanks a lot.
Customer in Wiltshire Posted on 11/06/2026 , work completed 10/06/2026
The "Absolute Legends" Vibe (High Energy & Enthusiastic)
Customer Service
Quality
Value
If you are looking to get your loft done, stop searching right now. Seriously. The Loft Guys are absolute legends. ​From day one and that's all it took, these guys were a machine. They didn’t just build a loft; they completely transformed how we live in our home. The craftsmanship is flawless, the attention to detail is next-level, and they smashed the timeline we agreed on. ​What impressed me most was their work ethic. They were polite, ridiculously tidy, and kept me in the loop the entire time. It’s rare to find a team that takes this much pride in their work. If I could give them 10 stars, I would. Elite service from an elite crew!
Customer in Suffolk Posted on 28/05/2026 , work completed 28/05/2026
Loft insulation
Customer Service
Quality
Value
From placing order to installation in just a week, all staff from the date of the survey to installation were friendly, polite and professional. The product and the installation were fully explained in plain language, without any uncertainty. The finished job is excellent and the installation has transformed the loft space. I can only express my pleasure with the finished job!
Customer in Suffolk Posted on 30/04/2026 , work completed 30/04/2026
Complete Saisfaction.
Customer Service
Quality
Value
I contacted R.J. Insulation to help me with insulation for my loft.Alfie was very helpful giving advise and explaining the procedure.we had s site visit before the insulation which was very helpful.On day of insulation three young men arrived on time.They were polite and friendly,took care of our property and worked for 6 hours and I was very satisfied with their work.I would certainly recommend R.J.Insulation.
Customer in South Ayrshire Posted on 27/04/2026 , work completed 26/03/2019
Professional / efficient and very knowledgeable
Customer Service
Quality
Value
Very efficient process from start to finish. No hard sell and we were given sufficient time and information to review available options. The installation team were on time. Cleared out the loft before installing new insulation and provided good clear communication throughout. Offering practical advice to make further improvements around lighting etc. They may not be the cheapest option out there but would 100% recommend as the whole process has been hassle free and we’re very happy with the overall service.
Customer in Worcestershire Posted on 26/03/2026 , work completed 26/03/2026
Complete satisfaction
Customer Service
Quality
Value
We have recruited RJ Insulation to help us to lay down new insulation material for our loft. Before the insulation, we have friendly and detailed conversation with Alfie, understanding the whole procedure and the benefits of using RJ Insulation. A site visit was also arranged before the actual day of insulation. A team of three led by Max arrived on time on the actual day. They were very friendly and worked continuously for around 8 hrs without even popping out for lunch, and executed their work professionally. Complete satisfaction while I can enjoy a lifetime warranty with our sheep wool insulation.
Customer in Edinburgh Posted on 17/03/2026 , work completed 17/03/2026