Loft insulation chosen
for your home’s age.
A 1900s cottage and a 1990s semi need different things from their loft. Tell us when yours was built and we will recommend sheep’s wool, hemp, recycled plastic or MultiFOIL, then fit it with a lifetime guarantee.
- Free 20-minute phone consultation, no obligation
- Lifetime guarantee plus a five-year IWA insurance-backed warranty
- Most installs completed in a single day
Step 1 of 2 · About your home
When was your home built?
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.
Where shall we send your recommendation?
A member of the RJ team will also call to arrange your free 20-minute phone consultation.
A real RJ install · MultiFOIL to the rafters
Insulation by build date
Older homes need to breathe. Newer homes need depth. We match the material to the era.
Most installers offer one product. We work with four, because a 1900s cottage and a 1990s semi need very different things from their loft.
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Before 1920
Sheep’s wool
Victorian, Edwardian, period and listed homes
Built before 1920? Start hereBreathable, natural, kind to old timbers
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.
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1920s to 1960s
MultiFOIL
Interwar and post-war homes with cut roofs
Built 1920s to 1960s? Start hereSlim, reflective, fitted to the rafters
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.
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After the 1960s
SupaSoft recycled plastic
Modern homes, often with trussed roofs
Built after the 1960s? Start hereSoft, itch-free and made from bottles
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
Not one-size-fits-all. Insulation chosen for your home.
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 insulation- 01
Four sustainable materials
Sheep’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.
- 02
Guaranteed for life
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.
- 03
Independently trusted
Rated 4.9/5 from 99 Which? Trusted Trader reviews, Trading Standards approved and a member of the National Insulation Association.
- 04
Clean, tidy and courteous
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.
What customers say
4.9Independently reviewed. Consistently recommended.
From 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
From first call to a job well done.
Clear advice, a properly considered specification and a team that treats your home with care. No hard sell at any stage.
Free phone consultation
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 twoAssessor visit
Happy 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 youInstallation
Our own team prepares the loft, installs your insulation and leaves everything clean and tidy.
Usually a single dayGuaranteed for life
Your 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 in
Good questions
Straight answers, before you decide.
Which loft insulation is right for my home?
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.
How long does installation take?
Most loft insulation installs are completed in a single day. We agree the date and timescale with you before we start, and leave the loft clean and tidy.
What guarantees do you offer?
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.
Do you cover my area?
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.
What happens after I use the calculator?
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
Warmer this winter, guaranteed for life.
Answer one question to see which insulation suits your home, or talk to the team today. Either way, there is no obligation and no hard sell.
Or call us free0800 804 4625