Loft insulation
What it is
Around 25% of the heat in an uninsulated home escapes straight through the roof. Heat rises, the loft is the highest point in the house, and unless something is stopping it, that heat just keeps going.
Loft insulation is a thick layer of mineral wool (or similar material) laid across your loft floor, between and over the joists. It traps the heat in the rooms below, where you actually want it.
It's the cheapest, fastest, highest-impact insulation upgrade you can do. Most homes are completed in half a day. Done properly, it'll save you money for the next 40+ years.
Is it right for your home?
Does Your Home Need Loft Insulation?
Some signs your loft insulation needs attention:
Surprisingly common in homes built before the 1980s
No insulation at all
Current standard is 270mm, so anything thinner is well below par
Less than 100mm depth
It loses effectiveness over time, especially if its been walked on or had things stored on top of it
Old or compressed insulation
Modern best practice is layers between and across the joists
Insulation between the joists only
Even with the heating on
Cold upstairs rooms that are difficult to warm up and keep warm
Bills that feel higher than they should be
Large energy bills that don't seem to match your usage
What You Get
What You'll Notice After Installation
Lower Heating Bills
Typical savings are around £200£350 a year for a semi-detached home, more for a detached. Loft insulation has the fastest payback of any home insulation upgrade — usually 2–3 years, then 35+ years of savings on top.
Warmer Bedrooms in Winter
Upstairs rooms are the first to feel the difference. The bedroom thats always cold? It wont be anymore.
Cooler Bedrooms in Summer
This catches people by surprise. Loft insulation works both ways — it stops loft heat radiating down through ceilings on hot summer days. Particularly noticeable in homes with bedrooms directly under the roof.
How it works
The Installation
Half a Day, Minimal Disruption
Free Survey
We come out, get up in the loft, measure what's there (if anything), check the joist construction, look for any issues (damp, condensation, electrical cables, recessed lights), and give you an honest assessment. No charge, no pressure.
Written Quote
A clear, fixed-price quote in writing within a few days. Materials, installation, removing old insulation if needed — all included.
Installation Day
We turn up with the materials, lay (or top up) the insulation to 270mm, fit insulation around any awkward bits properly — pipes, hatches, eaves, recessed lights — and clean up after ourselves. Most homes are done in 3–5 hours.
Done
You get all the paperwork — installation certificate, materials specification, building regs compliance if relevant. We're at the end of the phone if you ever need us.
What We Do Properly (That Others Often Don't)
The Difference Between a Good Loft Insulation Job and a Bad One
Loft insulation looks simple — and for the most part, it is. But there are details that separate a proper job from a cheap one:
Cross-laid layers
First layer between the joists, second layer across them at 90 degrees. Stops heat escaping through the joists themselves (timber conducts heat).
Eaves ventilation maintained
We fit eaves vents to keep airflow in the roof void — without them, you get condensation problems.
Pipework properly insulated
Water pipes in the loft need their own insulation, otherwise they'll freeze in winter once you've insulated under them.
Loft hatch insulated
A bare hatch is a giant hole in your insulation. We fit proper insulated hatches if yours isn't already.
Downlights handled correctly
Loft insulation laid over hot downlights is a fire risk. We use fire-rated fittings or insulation-rated covers around them.
Old, failed insulation removed
If what's there is compressed, mouldy, or full of dust and rodent damage, we take it out and dispose of it.
These aren't extras — they're how the job should be done. We do them as standard.
Why Rockwarm
Why Choose Rockwarm for Loft Insulation?
We won't be the cheapest quote you get. We'll be the one that's done properly, lasts the longest, and works the way it's supposed to.
40 years installing insulation
Sucessfully traded in the UK insulation industry for 40 years, with a team of experienced, qualified installers and a reputation for quality.
Proper materials
Knauf, Rockwool, Isover — major manufacturers, full specifications, certified products. We don't use cheap own-brand.
Our own installers
Same trained team, every job. No subcontractors.
No surprises on price
Fixed-price written quote, what we quote is what you pay.
TrustMark certified.
Government-endorsed quality standard.
Areas we cover
Where We Work
Based in Nuneaton, covering the Midlands:
Coventry
CV1 to CV6, all neighbourhoods
Nuneaton & Bedworth
CV10 to CV13
Birmingham
B1 to B98 across the city
Solihull and Sutton Coldfield Warwickshire
Leamington, Warwick, Rugby, Stratford
Leicestershire
Hinckley, Lutterworth, Market Bosworth
Not sure if we cover your postcode? Just call.
FAQS
Common Questions About Loft Insulation
Loft insulation
Ready for a Warmer Home and Lower Bills?
Book your free survey. We'll measure what you've got, tell you honestly whether it needs upgrading, and quote you a fixed price if it does.
