SuperQuilt multifoil insulation
A/A+ fire ratedAt roughly 40mm, multifoil delivers serious performance without stealing headroom — which is why it is the answer for Clapham homes with a room in the roof or a sloping ceiling.
South London loft specialists
Loft insulation in Clapham
Insulation is the one home improvement that starts paying you back on the next heating cycle rather than in a decade. We fit it across Clapham — to full depth, with the eaves kept clear and the hatch sealed, which is where most jobs quietly go wrong.
Free survey in Clapham
Fixed written price
No call-out charge
Why it matters
The case for insulating your Clapham loft
25%of a home's heat is lost through an uninsulated roof
1 in 5UK lofts are under-insulated or have the wrong material
270mmthe depth current building regulations recommend
90%less radiant heat loss with SuperQuilt multifoil
Which is why a free survey is worth half an hour of your time — the measurement itself usually settles whether a Clapham loft is worth spending anything on.
Clapham's homes
Heat loss in Clapham: where it goes
In a typical Clapham property built during the 1860s through the 1930s, the roof accounts for the largest single share of heat loss of any element in the building envelope. Warm air rises, the ceiling is thin, and above it sits a ventilated void at close to outdoor temperature for most of the winter.
The good news is that this is the cheapest part of the fabric to improve, by a long way. Wall insulation is disruptive and expensive. Window replacement is a major capital cost. Loft insulation is a day's work with materials that cost very little relative to what they save, and it needs no permissions of any kind.
The one local caveat: subdivision into flats is very common, so ownership of the roof space is worth establishing before work is booked. We factor that in at survey stage.
Our services in Clapham
Five ways we keep Clapham homes warm
Every one of these begins with the same free survey and ends with a fixed price agreed before anything starts.
Loft insulation installation
270mm depthMineral wool cross-laid to the 270mm depth current regulations recommend. For most Clapham homes this is the single highest-value thing you can do to the building.
Loft boarding
Storage-readyBoards laid straight onto joists crush 270mm into 100mm. We batten out instead, so Clapham homeowners get usable storage and keep the insulation they paid for.
Loft ladders
Fitted in a dayFitted in a day, finished to match your landing, with the hatch insulated and draught-sealed as part of the same job.
Loft makeovers
All-in-oneFor Clapham homeowners who want the roof space to stop being a problem and start being storage: everything, in a day.
Not sure what your Clapham loft needs?
Describe the property and what is bothering you about it, and we will recommend the right combination — or tell you that nothing needs doing.
Where we work
Covering Clapham and the surrounding area
Balham and Battersea are all covered by the team that works Clapham, which is why we can usually offer a survey slot within the same week rather than the same month.
In the loft
Loft work in and around Clapham
Examples of the work we carry out across the area — insulation, boarding, access and full makeovers.
Questions & answers
Clapham loft insulation — common questions
How much does loft insulation cost in Clapham?
Price depends on the loft's floor area, the depth and condition of anything already up there, how easy the space is to move around in, and whether old material has to be removed. That is why every Clapham quote follows a free survey rather than a phone call. Once given, the price is fixed. Our cost guide sets out each variable.
Do you work in the streets around Clapham?
We do. Coverage extends across Clapham and the neighbouring areas, and we are happy to confirm your specific postcode over the phone before booking anything.
Will insulating my loft cause damp?
Not if it is done properly. Insulating the floor makes the roof space colder, so moisture condenses more readily — the defence is the ventilation path at the eaves. Blocking it with insulation is what creates damp lofts. We keep it clear on every job. Our ventilation guide explains the mechanism.
Can I still use my Clapham loft for storage afterwards?
Absolutely. The only wrong way to do it is to board flat onto the joists. We raise the deck on battens or loft legs, board it in tongue-and-groove panels and leave the eaves clear so the roof keeps ventilating.
What homeowners say
Reviews from Clapham customers
★★★★★
Placeholder review 1 — paste a real customer quote about your work in Clapham here.Customer nameClapham · replace with the review date
★★★★★
Placeholder review 2 — paste a real customer quote about your work in Clapham here.Customer nameClapham · replace with the review date
★★★★★
Placeholder review 3 — paste a real customer quote about your work in Clapham here.Customer nameClapham · replace with the review date
★★★★★
Placeholder review 4 — paste a real customer quote about your work in Clapham here.Customer nameClapham · replace with the review date
Note for the site owner: these four review cards are placeholders. Replace the quotes and names below with real reviews from your Google Business Profile, Checkatrade or Trustpilot before you launch. Review schema has deliberately been left out until the reviews are genuine — marking up invented reviews breaches Google's guidelines.
Worth reading before you book
SuperQuilt vs mineral wool — one of our guides, written by the surveyors who assess lofts across Clapham and the rest of the capital every week. You can also browse all of our advice guides or read the general FAQ.
Written and fact-checked by the Loft Insulation London survey team, who assess loft spaces across the capital every working week. Last reviewed .
Ready for a warmer Clapham home?
We will look at your Clapham loft, measure what is there and tell you honestly whether it needs work. No charge either way.