A modern detached house built about 30 years ago just as insulation standards started to increase. A big issue was heat loss through the suspended ground floor which was not insulated in any way.

We moved into the house in mid 2017 and one of our first important improvements was the replacement of all the old and weary windows and doors with new high insulation units.

JSJ Foam Insulation Ltd were asked to consider whether they could install their Icynene spray foam insulation product to the underside of the ground floor. The problem they faced was that the height of the space between the solum and the underside of the floor joists was only about 280mm, this being considered to be an absolute minimum working space.

The work:
The JSJ team arrived on the first day and succeeded in spraying the foam from underneath to approximately 50% of the underfloor area. It became clear that the working space in the other 50% was impossibly small and the job was concluded at that point.

However, the benefits of the insulation was very quickly seen in the rooms that had been treated.

So, discussions took place with JSJ about a different approach to the remainder of the floor. It was decided to lift the floor and to fill the area between the joists from above. Jim and his team managed to lift the chipboard floor in single pieces that could be stood up against the interior walls. And so the required insulation was installed.

The outcome:
We are very happy with the outcome of the work. Our ground floor rooms are now very much more comfortable and retain the heat much better overnight after the central heating goes off.

Our heating and cooking is provided by gas which I monitor on a weekly basis. In the 3 month period from February to April 2019 after the work was completed, our gas usage reduced by just over 20% compared to the same period in 2018.

We are of the opinion that the quality of the workmanship exhibited by Jim and his team has been extremely high. Our big worry for the second stage of project was ending up with creaky floors. That has not turned out to be the case – the floors are just as they were prior to JSJ coming on site. Both phases of work were carried out in an efficient manner and our house left in a clean and tidy state.

We are very happy with the work done and have no hesitation in recommending JSJ Foam Insulation Ltd.

6 stars out of 5


Brilliant, thorough and professional service. Would highly recommend JSJ!


We have had the icynene foam insulation completed on Friday 04/10/19. The job was done professionally by both Jim and Grant. Everything promised was done and also asked myself up to the loft to see what it looked like to ensure I was happy. Seems excellent product dont think my heating has come on since they left which is great. Please don’t be fooled by the other salesman out there trying to get you to sign up for an astronomical cost. I was given a quote by evergreen power for 12 months that was going to be over £7000 but JSJ Foam insulation was around 70% cheaper. Very friendly company, all carpets etc covered with protective wrap and cleared up all mess after job was complete. One very pleasing part was at end of the job was invited up the loft to see complete job by Jim and talked through everything covered. I can’t recommend this company enough for any insulation issues you may have. Jim Grant & Susan it was a pleasure to meet you and have you in my house completing the job to the high standard you did. Anything I have issues with going forward with insulation etc I will definitely use your company. Susan & Jim please remember what I offered to do for you, anything else i can do to assist just contact. I am happy for anyone in west lothian area who would like to see the job complete are welcome to come and have a look no problems


It didn’t work out for us to use JSJ Foam Insulation this time round, so I can’t comment on their work in terms of product/installation, but I thought their customer service was excellent. Susan was very responsive and easy to deal with. We’ll hopefully get the chance to use them in the future.


We have been very pleased with JSJ’s knowledge of their products, buildings and energy conservation issues. This, together with their attention to pre-planning, liaison with our tenant and ourselves have helped make the job go very smoothly and successfully.


My loft conversion was Jim’s last job before he made the transition from the building trade into Icynene spray foam insulation in 2013. As I have had Jim do work for me on previous houses, it came as no surprise to me to how professional he was from start to end and his quality of work provided. Icynene spray foam was new to me, with Jim recommending it, I decided to use it in my loft roof space. As you can see from my picture taken in February 2014, I clearly am the only house in my row that has Icynene spray foam insulation. My heat wasn’t escaping from my roof, so the frost didn’t get melted like my neighbours houses.


I got in touch with JSJ Foam Insulation, when I was having problems with insulating a new build house for myself and my wife. From the very first meeting, I felt very comfortable that I was dealing, not only with a contractor but one who was very professional and knowledgeable about their business. There was no sales gimmick and no pressure. Everything was explained fully and simply. The team arrived when they said they would, protected all affected surfaces, worked long hours and completed the job to a high standard within the time line which they had given to me.
After completion, both Jim and Susan (back at the office) were in contact to make sure we were happy with their performance and the job they had done. I would have no hesitation in recommending JSJ Foam Insulation to potential customers.
Job well done.


Excellent service, adjusted product to suit my special circumstances. Clean and tidy installation, pleasant and friendly staff. End result ideal for my project.


We have just had our loft insulated by JSJ and I can’t believe how easy the job was. The three guys were here first thing and the job took about 4 hours. Covered all carpets so there was no mess. I highly recommend JSJ and if we can get our walls filled we will. Wish all of the tradesmen were are good as JSJ. Thanks guys you were all amazing 👍


I had my roof insulated by JSJ. Jim and Susan were great from the start, offering me plenty of advice. Being in the Armed Forces I was limited to dates but Susan kindly worked around us. Jim, Craig and Grant arrived to carry out the work and always kept me in the loop with what was going on and what they were doing next. The lads were professional and polite and showed me their work before shutting the area back off. I honestly expected it to be a mess and be left with lots of holes but Jim carefully cut the plasterboard in a way that it could be screwed back into place and the lads kept the house clean making sure everywhere had plastic sheeting and then they vacuumed everywhere before they left. As for the product, we have noticed an incredible difference in the house. The house is so warm now and we have even noticed that we can’t hear as much noise from outside whilst in the bedrooms. (Bedrooms are room in the roof). Thanks, JSJ it was a pleasure and I would highly recommend your team.


Recommended by boy at mearns building, the team did a fantastic job. Boys kept the place very clean and all work was undertaken quickly. Have seen a massive Improvement in the garages warmth, moisture and noise reduction. Jim and Susan we’re great at keeping me to date. Can’t recommend them Enough!

Johnny Burns


A great company to deal with, from initial measuring up and advice, to completion. The guys arrived on time and worked pretty much non stop, for a long day. I cannot fault the job . I had looked at doing the insulation myself with kingspan or similar, but by the time you get it cut and sealed not to mention the time and effort that would take. This was by far the best option for both cost and quality. Thanks guys, i will highly recommend you to anyone doing a renovation or build.


I would certainly recommend JSJ Foam Insulation as they are nice and pleasant people who provided an all round excellent service. My property is now warm, cosy, draft free and noise from the traffic outside has been reduced. Heating bills have reduced due to the property heating quicker and staying warm for longer. I am extremely happy with the product and service provided. Thank you again for a job well done.


We recently got JSJ Foam Insulation Ltd to fill 3 walls and a ceiling as interior walls were hollow …the guys were prompt, fast, friendly, tidy and the best of it all is, our house is much quieter and warmer. They were in and away in less than a day …job well done.

Alan & Rita Craig


Turned up when they said they would, carried out the job with a professional approach,very happy customer, thanks guys!


My wife and I are delighted with the work Jim and his team have done and would highly recommend the company to future clients. I am especially impressed by the attention to detail and the way everything was covered to prevent any overspray. I’ve been in the building trade a long time and it’s refreshing to see people who care!

Robbie Devine


Top class product top class service.


I googled and found JSJ foam insulation, we had several parts of our old house treated and if has made such a difference. They were fast & clean workers, nothing was out of the question. Thank you, I have recommended them to several of my friends.


I have used JSJ twice now, for my metal roofed garage and also my extension.

The garage in winter suffered from condensation and the foam treatment cured it instantly.

The team are very professional and the clean up job afterwards is amazing as everything gets covered in plastic beforehand.

I would recommend the foam over kingspan every day.


We have just had the foam insulation installed in our bungalow in Edinburgh and Id like to say what a huge difference this has made to making the house totally comfortable and snug like we never imagined.

As a background to the story, we bought and renovated the house last year and thought we had done a good job. We renovated during the summer 2018 which as we all know was a warm summer and although we thought we had insulated the loft conversion to a decent standard it soon became apparent that the joiner had made a hopeless job of it and it was absolutely freezing up there.

We also have a decent size solum and we counted 13 airbricks right round the whole house.

Although we have thick undelay and carpets it was not enough and so the whole house felt like a huge draught box.

I know this sounds ridiculous but the upstairs was so cold I went to the Morningside charity shops and bought 5 fur coats so I could lay them over the bed at night. It was the only way to get warm and each night it felt like we were getting ready for an episode of Game of thrones. I was so cold I was thoroughly miserable.

I have to say the results are really amazing.

Before we got it done, I would walk upstairs and it honestly felt like someone had left all the velux windows open. It was that draughty.

But now after we have had the place Icynened it’s really snug and also very quiet. I love that I am in charge of my own fresh air! There have now been nights where its too warm and we have to open a window at night hurrah! Downstairs is the same.

We have a thermostat in the hallway and my daughter asks why the heating isn’t going on (it’s not cold but we are so used to it going on all the time cos it was cold before) so we keep upping the thermostat by one degree and it comes on then goes off again after 20 mins. This must be the effect of the Icynene. It does what it says on the can!

Heating bills – we moved in last November and because the place was freezing our bill for the first 3 months was about £1200. This is because we were trying to get comfortable. It’s a new heating system so very efficient but we just couldn’t get warm cos it was so draughty so this is why the bill was so high. We haven’t had a bill in yet after the icynene but I know its going to be lower as some days the heating only goes on in the morning, its on an auto timer with a manual override. I work from home so if it was cold, I would totally be putting it onto manual but I have not felt the need to do that.

This is definitely not wishful thinking as I hate being cold! so if it was cold the heating would totally be going on!

Now I know there are people out there that go into the whole ” payback ” and the cost of getting your house Icynened, however for us it wasn’t about the saving money/payback etc etc it was about being comfortable in our house. How can you put a value on not being cold and miserable? There’s simply nothing worse than being cold when you are at home particularly after we had already spent a lot of money renovating, new windows etc. Before we got the place Icynened we were gutted that we had spent all that money on renovating and we felt like saying, well what was the point of doing all that , the place is freezing anyway!

So, for us it was about being comfortable and warm and not draughty and being able to open windows when we want to, and JSJ have totally helped us achieve that.

We would definitely recommend this to anyone. Jim and Susan are very very knowledgeable about the science behind it all and there’s not much they don’t know about the product and also about houses generally. If anyone would like to ask me about the work and our experience with JSJ I’m very happy to discuss this more on the phone or email. Ill leave my details with Susan.

Best regards
Mhairi and Jim Gibson


This recommendation is 2 months in the making. I was wary of waxing lyrical about my new insulation until I saw the new, almost instant, coziness translated into savings. Prior to the installation, my gas bills were through the roof and the top half of the house was very draughty. We had underfloor heating in one part of the house but, although it was toasty, the system was running almost constantly with the floor very hot at times. Now, after the foam insulation the temperature is as good but without the heat flying out of the roof and the floor is now a very comfortable temperature.

Next was the energy company; they refused to believe that my energy use had dropped by a whopping 50%. They sent someone to verify the meter readings before they would accept to credit my account by, wait for it, £700.

I must apologise to JSJ foam insulation for not having given any feedback until now but I hope they don’t feel that I am not totally satisfied with them or the concept of foam insulation. It is quick and clean to install and produces an instant increase in comfort.

They left the house clean and tidy and were courteous and professional to a fault.

Bovill & Boyd – Commercial Building EASTKILBRIDE

The work completed by JSJ Foam Insulation was completed as promised with minimal mess. Once the work was completed we were shown a video of the extent of the draughts coming through the walls before the work was completed. We are now in the middle of the first winter and we are perfectly warm using just our central heating system whereas prior to the completion of the work we had standalone heaters located throughout the building. Our electricity costs have decreased by 25% accordingly.

In short we are delighted with the work.
Thanks and Regards

Tracy Brown
Commercial Director


JSJ have just completed insulating my 1970s property which is being renovated . House is now better insulated than a modem new build and well exceed building standards minimums . Susan and Jim have been great to deal with from the start to finish . Fantastic attention to detail and they delivered on all their promises . A real pleasure to work with Damian Turner


We live in the ground-floor of a stone-built, semi-detached house (built around 1905) which was split in to upper and lower flats during the 1960s. As heating costs keep rising, we decided on some research into our best options for improving the insulation (having previously installed double-glazed windows and doors).External wall insulation was rejected as it would ruin the appearance and would also require our upstairs neighbours to similarly commit. Internal wall insulation was also rejected because installation would be extremely disruptive, difficult to do properly in a house of this age, reduce our internal space and ruin many of the features of the rooms. Our only alternative seemed to be underfloor insulation. And then we found the ICYNENE® range of spray foam insulation products. Suffice to say that this seemed to be the ideal solution for an older building like ours. The enthusiasm and helpfulness of everyone we spoke to about the product impressed, and we were soon directed towards JSJ Foam Insulation (formerly ‘Therma Sol Ltd’). Jim and Susan were a delight to work with and, after a telephone discussion and a site visit, installation took place in early April, 2016.Jim and his trusty ‘henchman’, Andrew, completed the work in an intensive 12-hour period which was impressive to watch – particularly as we were kept informed of progress throughout (some of which I was under the floor to see). The whole process was conducted in a very professional manner as Jim is also a time-served joiner. The height of our underfloor foundation space varies from roughly 5 feet at one end of the house down to less than 18 inches at the other, and Jim’s determination to cope with the inevitable difficulties encountered in ever decreasing underfloor space deserved a medal! So, what difference has it made? Over the next three months, our gas consumption dropped by 598 kWh compared with the same period in the previous year. Admittedly, this may not seem much – but spring/early summer were a-coming in, the whole house is warmer, the central heating is ‘off’ much more frequently than before and, an added bonus being on a main road, the house is also quieter. We feel certain that having the insulation installed will pay for itself over the next couple of winters, and we have no hesitation in recommending JSJ Foam Insulation Ltd. to others – especially those who occupy a house like ours. Oh, forgot to mention that you also get a 25-Year Warranty when installed by an Icynene® licensed professional contractor.


Ewen McGregor – Underfloor Insulation


I run my own Architectural Practice and researched various companies. But have used JSJ to apply insulation to roof spaces and walls on a Renovation Project of my own, finding both Principals (Jim + Susan) very attentive and helpful. The site operatives were polite and hard working. Most certainly will recommend JSJ to friends and Clients.


We used JSJ to insulate two of our bedrooms that were damp and cold due to poor insulation. Jim and his guys were excellent. Very professional and showed us progress throughout using a thermal imaging camera. Very happy with the result and great people to work with.


JSJ Insulation recently insulated the roof in my 3 bed detached cottage and I couldn’t have asked for a better service. From start to finish the team were very professional and easily contactable through mobile, text and e-mail. I am a military man and was only home for a few days between deployments, the team were flexible enough to work to my scarce availability at short notice and all of the work was complete in a day. The price was very reasonable, much cheaper than I had expected it would be and when the job was complete the house was left clean and tidy. Craig and Grant took the time to explain the technology behind the expanding foam insulation and showed me around the equipment that is used. I look forward to using the company again in the future.


JSJ Foam Insulation services have completed two separate jobs for us. We live in a traditional bungalow and the first job was to insulate our loft and under flooring. A few years later we got an extension built and they came back to insulate the new build.
On both occasions l have been very impressed with the quality of work carried out, the product they use its environmental profile and the level of customer service they offer. They are a company that knows the true meaning of customer service!
I would have no hesitancy in recommending them, l already have, as they are a local company that know their product and they can be relied upon.

Excellent work, thank you.


Based on recommendation from John Miller Construction, we approached Jim and Susan regarding underfloor insulation for our bungalow. The service from quote to completion was excellent; and the end result is simply fantastic. We have seen, heard and felt improvements:

  1. visual – condensation on windows eliminated
  2. acoustic – dampening with reduction in noise from central heating boiler (located below bedroom floor)
  3. warmth – home heats quick and retains too

Overall delighted with product and service. Would highly recommend worth every penny. Thank you.


I am very happy with the the job they did installing the insulation – and so were my builders. I also very much appreciated the nice customer service and would certainly use this company again and recommend it to others.


Thank you for the prompt and courteous service. We were delighted to have your team here to insulate our loft.
We immediately noticed a difference — there were gales the following morning, but we couldn’t hear the wind! The man who cuts the grass came on Monday, and normally his mower is so noisy, I have to leave my office at the back of the house. However on this occasion, I was able to keep working without being disturbed.
The neighbours have two German Shepherds who were barking after we said hello the other night, but when we came into the house the sound of the barking was very muffled.
All this time we thought our windows were the ‘weak link’, but it is clear with the “before and after” that so much of the sound we were hearing from outside, was coming directly from our poorly insulated and leaky loft!
It’s August and obviously the heating hasn’t been on, but if the sound-proofing we are enjoying is any indication of its effectiveness, our investment in Icynene is going to pay dividends in ways we had never anticipated!
Thanks very much.
Mrs L B, Inverness


Really this 5 does not reflect the service we had with JSJ insulation, from the quote to the work to the after care, the job was carried out very professionally and clean and tidy. Our expectation was met and more, we used this company for soundproofing our guesthouse bedroom walls.


Friendly family run business, willing to be flexible and go the extra mile providing an excellent quality product.


On the advice of a Chartered Surveyor, we arranged for Jim to insulate our attic conversion using Icynene Foam. We cannot state too strongly how impressed we were with his advice, professionalism and industry.
He was willing to fit his visits to our timescales and had high attention to detail.
He is an excellent ambassador for this fantastic product.
We were very impressed and are now enjoying the benefits of effective insulation and sound deadening.


Great company. Very friendly but highly professional. Used them on a few jobs now and wouldn’t hesitate to use again.


Jim recently carried out Icynene spraying on our self-build project in Northumberland. It’s an ambitious project pushing a little at the boundaries of design and environmental performance. As with any project trying to use new materials and methods of construction some elements have been more successful than others. I am pleased to say that I was not disappointed with Icynene as a product or Jim Shearer as a contractor.
Jim strikes me as refreshingly conscientious in the way that he sets about his work. Everything that needed to be was well protected and the spraying neat and consistent. Jim worked long hours to complete the sizeable job in a timely fashion. We got an exemplary score on our air-tightness test and I’m convinced Icynene and Jim’s quality spraying played a big part in this.


Jim, Susan and the JSJ team have worked with us on a difficult and unusual building to ensure that our renovation project is airtight and well insulated. They have been cheerful, patient and happy to work around the rest of the project. The work itself was delivered efficiently and with very little disruption – excellent. We would recommend this company to anyone considering this type of insulation.


Fantastic job as usual, a very professional company and very obliging.


I used JSJ to insulate my extension. A professional service from start to finish. I would highly recommend them and definitely use their services again.


Jim was very professional and efficient. He seemed genuinely keen to get me the best deal possible, not pushing for more work than was necessary. He worked well within a tight schedule and was meticulous in making sure the job was done to a high standard, without any corners being cut. The soundproofing has made a big difference in my property, which is above a noisy pub.


Your guys did a great job.

House even looks cosy with the insulation fitted.


I am very happy with the results from the JSJ Foam team on my dorma bungalow. Jim, Craig and Grant did a great job tidy job and always had time for questions and queries from myself and my young son, happy to show him how it all worked! Before the install Jim and Susan were excellent on the phone with details and any questions i had about spray foam, and where i could have it done, making my decision to use them and product easy. Thanks to you all Dave


We could not be more happy with the service and results we received from the whole team at JSJ Foam Insulation. The communication from Susan was excellent from start to finish and the awkward shape and difficult access of our loft space did not phase Jim and the guys. A true pleasure to work with, thanks again!


I would just like to thank you all for the excellent service you provided and the professional manor that every stage had right down to the silly little things such as keeping a duct accessible that was in the wall which I personally overlooked.
It is refreshing to deal with people as professional as yourself.

Thanks again I am sure if we are needing anything in the future we will be in touch.

Malcolm Campbell


Very happy with the under floor foam insulation it’s made a big difference to the warmth in my home Craig and grant have done a great job tidy as well thanks lads didn’t actually meat Jim and Susan but spoke to Susan on the phone a few times and is very helpful thanks Susan.


Cracking Service from Jim & Susan, guys arrived and worked all day to complete large loft area. Very Clean and tidy, nothing was a problem. We plan on using JSJ for many of our projects in the future. Thanks Again Cheers Scott


Fantastic service from start to finish.

Upon purchasing our property, the lack of insulation became apparent. New to the many ways we could insulate, we sought advice from multiple companies; JSJ were one of them.

As beginners to spray foam, the JSJ team were always at hand to answer the many questions we had. Our new home required insulation under the floor and in the loft space. We were comforted by Jim’s accuracy and time spent to fully understand the design of our property and the correct application of spray foam for different areas.

Jim and Susan made multiple visits ensuring we were 100% happy with product and fully informed with all the details before we agreed to carry out the work.

On both mornings of the project the JSJ team arrived bang on time. Exceptional care was taken to minimise mess and disruption within our home and the team worked tirelessly to complete the job on time. The finished product, both underfloor and loft space looks flawless. We have already noticed an increase in heat retention within our home; in particular the rooms upstairs where insulation was minimal are a lot warmer.

Following completion of the project the 25year Icynene warranty was promptly issued. We would not hesitate to recommend JSJ Foam Insulation to anyone looking for a solution to their insulation needs. Top class service from a very knowledgeable team.

Many thanks
Dave and Maggie


From moving into our newly built office & factory of composite panel construction, we bemoaned the heating. Staff felt cold and complained about draughts. We used a succession of advisers and consultants to no avail until someone suggested air movement was the real issue. Draughts are identified as one of the two most annoying environmental factors in workplaces. We are sensitive to air movements of as little as 0.05m/s and temperature differences of 2 degrees, and the warmer the space the more easily we notice a “draught”.
Jim & his team sprayed Icynene inside our roof space and internal wall cavities and the whole problem was sorted!
The office comfort is greatly improved; draughts have been hugely reduced even in high winds which has made the biggest single improvement in perceived comfort. The temperature across the whole office space is much more even which means that moving air from people, doors or the air handling system are not perceived as unpleasant draughts.
The office heat loss rate has reduced, typically the overnight temperature drop is 1-3 degrees less than before, and the office regains the desired temperature an hour faster than before. The temperature does not drop again during the day, when previously there could be a 3 to 4-degree fluctuation. Again this boosts the perception of the space being “warm and comfortable”.
The unexpected gain is in background noise levels. The background noise has dropped whether from the airport or the rain & wind. Unfortunately, it’s not something we ever measured but everyone has commented on how much less “noise” there is. This has helped us to bring all our office staff into one area which has provided a huge boost to teamwork, productivity and thus financial performance.
Over the whole year we saw a 12% reduction in gas consumption. More importantly we removed the fan heaters below every desk which removed all the trip hazards, fire risks and vastly more expensive electric kWhr. However, all is dwarfed by the rise in “perceived staff comfort” which helps the team know they matter and gains their enthusiasm and commitment which has allowed the Teknek to grow by 8%. Against this growth, payback was under a year.
Disruption was minimal. The installation was performed out of hours and cleared up perfectly before we re-opened each morning. The team were friendly, diligent and efficient. I am happy to recommend them and Icynene. Cheers,


JSJ put foam insulation into our loft and an extension some months ago. We can now notice a significant difference in temperature in a bedroom that was previously very cold. Very happy with the work, workmanship and follow up on the work. I would highly recommend JSJ.


Insulated my suspended floor, made a massive difference. Removed all draughts and made the room noticability warmer. The savings from my energy Bill’s will easily pay for the upfront cost over time.