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55 Google reviews
1–2 days
Typical install time
£7,500
BUS grant amount
RJM Insulation Limited is an MCS certified air source installer based in Middlesex. They are registered with the Boiler Upgrade Scheme, meaning they can help you claim up to £7,500 towards your installation.
Based in Middlesex, UB8 2UH
Areas served:
4.1
55 Google reviews
Based on verified Google reviews
Connor Rowberry
Poor service all around, trying to get them to fix the covered air bricks which is causing mold to spread under living room floor. Littered while working on property Rubbish in my garden and pond. Stuck live electric feed to house. Broke our sink waste pipe. Siliconed a down pipe onto the wall with no fixings or brackets. Damaged are toilet seat due to cutting with a saw atop. And I will add now they have been back to do the remedials which are not finished because drilling a hole into solid brick and putting a airbrick in there because you can't find the originals and are incompetent doesn't fix or create any air flow. you have damaged my house and not fixed what is incorrect in the first place and now have more remedial work to do.
Trudi Cobham
I must say I was apprehensive about having the work done at first but I am so pleased I did. The difference it has made is amazing. The workmen were very hardworking and often did very long hours and if you have any queries the young lady in the office is extremely helpful. I would highly recommend this company if you need works done.
Kieran Samuel
Recently had a new boiler and external wall insulation From the office girls who had been fab and the boys have been great easy to work with
Jenny Chivers
Fantastic, friendly and professional correspondence. Work was excellent and made a real difference to the warmth of my house and therefore my comfort and wellbeing. I would thoroughly recommend RJM Insulation.
Karl McC
I write to recommend the insulation works and customer service provided by RJM insulation Ltd. From the outset they were very clear about timelines and throughout the job Jessica in the office kept me fully up to date with the schedule of works. The guys who carried out the work always came on time, on the days required and completed good quality workmanship. The end result looks great aesthetically but most importantly I look forward to the heat retention benefits that the loft and wall insulation will bring . Good job RJM!
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We are MCS‑certified and registered with an approved consumer protection/competent person scheme, which is essential for quality assurance and to access grants like the Boiler Upgrade Scheme (BUS).
We carry out a detailed home assessment, including property type, insulation levels, existing heating system and available outdoor space, to confirm whether a heat pump is a good fit.
We design the system using a heat‑loss calculation for your home, then match the correct kW size and model (for example, air‑source vs ground‑source) so it runs efficiently and reliably.
Our fixed quote clearly lists the heat pump, cylinder, controls, labour, scaffolding (if needed), electrical work and any radiator or pipework upgrades, so you know exactly what you’re paying for.
Yes, as an MCS installer we can confirm your eligibility, apply for the BUS grant (worth up to £7,500) on your behalf and deduct it directly from your quote.
A typical air‑source heat pump installation takes around 2–5 days, and we’ll agree locations for the indoor and outdoor units, manage any planning considerations and keep you informed each day.
After the heat‑loss survey, we’ll advise if any radiators, pipework, electrics or hot‑water cylinder need upgrading so the system can run efficiently at lower flow temperatures.
Modern heat pumps are designed to be quiet and must meet UK noise regulations; we’ll position the unit to minimise any impact on you and your neighbours and comply with local planning rules.
You’ll get manufacturer warranties on the heat pump plus our workmanship guarantee, and we offer ongoing servicing and support to keep your system performing at its best.
We’ll estimate your likely annual running costs and potential savings based on your current fuel type, insulation level and tariffs, using real‑world performance data rather than lab figures.
Boiler Upgrade Scheme
Up to £7,500
off your heat pump installation
This installer handles the full BUS grant application — deducted directly from your quote. No upfront payment needed for the grant amount.
Scheme open until 2028 — limited funding available
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