SuperQuilt multifoil insulation
A/A+ fire ratedWhere a Carshalton loft has already been converted, insulation has to follow the rafters rather than the floor. SuperQuilt does that in 40mm instead of the 200mm-plus a wool build-up would need.
South London loft specialists
Loft insulation in Carshalton
We insulate lofts across Carshalton — topping up thin or ageing material to the depth current building regulations recommend, boarding the space so it earns its keep, and fitting proper access so you can actually get to it. Every job starts with a free survey, and every price is fixed before work begins.
Free survey in Carshalton
Fixed written price
No call-out charge
Why it matters
The case for insulating your Carshalton 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 Carshalton loft is worth spending anything on.
Carshalton's homes
Why Carshalton lofts need attention
Carshalton forms part of South London, an area whose housing is characterised by dense Victorian terraces and villas, interwar semis and a substantial amount of purpose-built and converted flats. The bulk of it went up during the 1860s through the 1930s, decades before insulation was a design consideration at all, and what sits above the ceilings today is usually a retrofit added at some point in the last fifty years to whatever standard was current at the time.
That matters because the standard has moved repeatedly. Lofts insulated in the 1980s typically received 100mm; earlier work was often 50mm or nothing. Current guidance is 270mm. A great many Carshalton houses therefore contain insulation that was entirely adequate when it was fitted and is now doing roughly a third of the work it should be — while the homeowner reasonably assumes the loft is 'done'.
Subdivision into flats is very common, so ownership of the roof space is worth establishing before work is booked. It is the sort of thing a survey establishes in ten minutes and a phone quote never can.
Our services in Carshalton
Five ways we keep Carshalton 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 depthTopping up from the 100mm many Carshalton houses still have to a full 270mm is the cheapest meaningful energy improvement available to a UK homeowner.
Loft boarding
Storage-readyBoards laid straight onto joists crush 270mm into 100mm. We batten out instead, so Carshalton homeowners get usable storage and keep the insulation they paid for.
Loft ladders
Fitted in a dayMany older Carshalton hatches are too small for a ladder to swing through safely. We measure at survey and price any enlargement up front rather than on the day.
Loft makeovers
All-in-oneThe whole loft dealt with at once, for one fixed price. Most Carshalton properties are finished within a day.
Not sure what your Carshalton 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 Carshalton and the surrounding area
We are in and around Carshalton most weeks, and the same teams cover Sutton and Wallington. Coverage across South London is continuous rather than patchy, so a postcode on the boundary is not a problem.
In the loft
Loft work in and around Carshalton
Examples of the work we carry out across the area — insulation, boarding, access and full makeovers.
Questions & answers
Carshalton loft insulation — common questions
Do I need planning permission in Carshalton?
No. Loft insulation, boarding and loft ladders are all improvement works well outside planning control, in Carshalton as everywhere else. A loft conversion — creating a habitable room with structural alterations — is different and normally needs building control approval. We do not carry out conversions.
Do you work in the streets around Carshalton?
We do. Coverage extends across Carshalton and the neighbouring areas, and we are happy to confirm your specific postcode over the phone before booking anything.
What insulation depth do you fit?
Full recommended depth of 270mm as standard. Going deeper gives sharply diminishing returns; stopping short leaves money on the table every winter. For sloping ceilings in Carshalton loft rooms, multifoil at around 40mm is the practical alternative.
Can you fit a loft ladder at the same time?
Yes, and it is cheaper done together. The one thing to check is the hatch: many older Carshalton openings are too small for a ladder to swing through safely, so enlargement may be needed. We measure at survey and price it up front. See loft ladders.
Will insulating my loft cause damp?
Correctly installed, no. The risk comes from packing material hard into the eaves and sealing off the airflow the roof depends on. We stop the insulation short and use eaves trays where the pitch requires them.
How long does the work take in a typical Carshalton home?
A straightforward insulation job in a three-bedroom Carshalton property is a half-day. Larger, cluttered or awkward-access lofts take longer, and stripping out failed material adds time — all of which is established at survey and reflected in the quote.
What homeowners say
Reviews from Carshalton customers
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Worth reading before you book
How much does loft insulation cost in London? — one of our guides, written by the surveyors who assess lofts across Carshalton 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 Carshalton home?
Get a fixed written price for your Carshalton property. No call-out fee, no obligation, and no chasing afterwards.