Sheep’s wool, hemp, recycled plastic or MultiFOIL, matched to how your house was built and fitted by a Which? Trusted Trader. Every install is guaranteed for as long as your home stands.
Step 1 of 2 · About your home
An approximate age is absolutely fine.
Please choose an option, or select “I’m not sure”.
Takes about 60 seconds. No obligation.
Your recommendation is ready. Homes like yours usually suit one of our four sustainable materials. Tell us where to send it and we will reveal it on the next page.
A member of the RJ team will also call to arrange your free 20-minute phone consultation.
A real RJ project · Option 3 storage room
Insulation by build date
Most installers offer one product. We work with four, because a 1900s cottage and a 1990s semi need very different things from their loft.
Victorian, Edwardian, period and listed homes
Locally sourced British wool that manages moisture naturally, helping older roofs avoid condensation while keeping the heat in. Naturally fire-resistant and good for decades.
Plant-based alternative: hemp, the vegan equivalent with the same benefits.
Interwar and post-war homes with cut roofs
A multi-layer foil system that keeps the whole loft warm in winter and cool in summer, takes up almost no space and turns the loft into usable storage. It is in every RJ storage room.
Also the base of our loft storage rooms, from £10,000.
Modern homes, often with trussed roofs
Around 12,000 recycled single-use bottles per loft, laid across the loft floor for excellent depth without the irritation of fibreglass. Safe to handle and pleasant to live with.
Melts away from flame rather than spreading it.
Why homeowners choose RJ
Every home is built differently, so we match the material to your roof, your loft and how you use it, then install it with the care you would expect from a Which? Trusted Trader.
Find my insulationSheep’s wool, hemp, SupaSoft recycled plastic and MultiFOIL. Natural, recycled and long-lasting alternatives, chosen for your home’s construction rather than whatever is on the van.
Our insulation is guaranteed for as long as your home stands, with a separate five-year insurance-backed warranty from the IWA for extra peace of mind.
Rated 4.9/5 from 99 Which? Trusted Trader reviews, Trading Standards approved and a member of the National Insulation Association.
The words that come up again and again in our reviews. We treat your home like our own and leave it exactly as we found it, only warmer.
Loft storage rooms
A complete, insulated storage room: boarded, building-regulations compliant, with a fitted ladder and hatch, and finished to the level you choose. Quicker and far more affordable than a conversion, installed in as little as two to five days.
£10,000starting from
£20,000starting from
£35,000starting from
Storage room planner
Tick everything you would like in your loft. We will match you to the right option, show its guide starting price and list exactly what is included, before you share any details.
Your loft wish list
Tick as many as you like. The highest-level feature you choose sets your option.
Your match · Option 1
£10,000guide starting price
Guide starting prices only. Your written quote depends on the size of your loft, access, construction and finish, and follows a free phone consultation and assessor visit.
No obligation. Prices shown are for complete storage rooms, not boarding alone.
Option 1 · from £10,000. Share your details and our storage room team will call to arrange a free phone consultation.
What customers say
4.9From 99 reviews on Which? Trusted Traders (opens in a new tab), the UK’s independent consumer champion.
“Whole process very professional from start to finish, took time to explain options and didn’t feel pressured into anything.”
“The lads were fantastic. Clean job and very efficient.”
“Professional, quick and tidier than I could have expected.”
How it works
Clear advice, a properly considered specification and a team that treats your home with care. No hard sell at any stage.
A relaxed 20 to 30 minute call. We ask about your home and your loft, recommend a material and give you an indicative cost.
Within a day or twoHappy to go ahead? An RJ assessor visits to confirm the details, complete a risk assessment and method statement, and finalise your written quote.
Arranged around youOur own team prepares the loft, installs your insulation or storage room and leaves everything clean and tidy. Most insulation installs take a day; storage rooms two to five.
Clean, tidy, on timeYour insulation is guaranteed for as long as your home stands, plus a five-year IWA insurance-backed warranty on the work.
Peace of mind, built inGood questions
The age and construction of your home is the best starting point. Homes built before 1920 usually suit breathable sheep’s wool or hemp, which help manage moisture in older timbers. Homes from the 1920s to the 1960s often suit MultiFOIL. Homes built after the 1960s usually suit SupaSoft recycled plastic insulation.
Our insulation finder gives you a recommendation in a minute, and we confirm it with you on a free phone consultation.
No. £10,000, £20,000 and £35,000 are guide starting prices for Options 1, 2 and 3. Your written quote depends on the size of your loft, access, roof construction and the finish you choose, and follows a free phone consultation and an assessor visit.
No. A storage room gives you a fully insulated, boarded, building-regulations-compliant space for your belongings, installed in as little as two to five days and at a fraction of the cost of a conversion. It is not a habitable room such as a bedroom. Tell us how you would like to use the space and we will advise.
Our storage rooms are complete, insulated spaces rather than boarding on its own, which is why they start from £10,000. If you are only looking for boarding, a ladder or a hatch, call us and we will point you in the right direction.
Most loft insulation installs are completed in a day. Storage rooms typically take two to five days depending on the option and the size of your loft, and we agree the timescale with you before we start.
All RJ insulation comes with a lifetime guarantee for as long as your home stands. Separately, your installation is covered by a five-year insurance-backed warranty from the IWA (Independent Warranty Association). Ask our team for the full terms.
RJ Insulation is based in Ipswich, Suffolk and installs across England and Scotland. Share your postcode in the calculator and we will confirm availability for your area.
You will see your recommendation straight away. A member of the RJ team then calls you to arrange a free 20 to 30 minute phone consultation, followed by an assessor visit and a written quote if you would like to go ahead. There is no obligation at any stage.
Your home has more to give
Start with a 60-second recommendation, or talk to the team today. Either way, there is no obligation and no hard sell.
Or call us free0800 804 4625