SuperQuilt multifoil insulation
A/A+ fire ratedWhere a Kennington 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 Kennington
If your Kennington loft has 100mm of flattened wool and a boarded patch balanced on the joists, you are not alone and you are losing money every winter. We fit insulation to the recommended 270mm depth, and raise any boarding clear so it keeps working.
Free survey in Kennington
Fixed written price
No call-out charge
Why it matters
The case for insulating your Kennington 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
None of this requires permissions, scaffolding or structural work. In Kennington, as anywhere, it is a day's work with materials that cost little relative to what they save.
Kennington's homes
Kennington housing and the insulation problem
Like much of South London, Kennington is built largely of dense Victorian terraces and villas, interwar semis and a substantial amount of purpose-built and converted flats. Housing of that age has a particular relationship with heat: solid or early cavity walls, single-glazed openings replaced piecemeal over the years, and a roof void that was simply a void until somebody decided to put something in it.
The roof is where the largest single share of that heat goes, and it is also the cheapest part of the building to improve. There is no structural work, no planning permission, no scaffolding and no disruption beyond a day with the hatch open. For most Kennington homeowners it is the first upgrade that makes clear financial sense and the last one they get round to.
The complication locally is that subdivision into flats is very common, so ownership of the roof space is worth establishing before work is booked.
Our services in Kennington
Five ways we keep Kennington 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 depthThe standard job, done to standard: two layers, the second laid across the joists to kill the cold bridge, eaves left clear. Most Kennington lofts are finished in half a day.
Loft boarding
Storage-readyA squared, edged deck reached from the hatch, with the eaves left open so the roof keeps breathing. Sized to what you will actually use rather than the whole Kennington footprint.
Loft ladders
Fitted in a dayFixed, stable access instead of a stepladder on the landing. Timber, aluminium or concertina, chosen to suit the space your Kennington home actually has.
Loft makeovers
All-in-oneThe whole loft dealt with at once, for one fixed price. Most Kennington properties are finished within a day.
Not sure what your Kennington 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 Kennington and the surrounding area
If you are on the edge of Kennington — closer to Lambeth and Camberwell, perhaps — you are still inside our working area. The boundaries on this site are for navigation, not for pricing.
In the loft
Loft work in and around Kennington
Examples of the work we carry out across the area — insulation, boarding, access and full makeovers.
Questions & answers
Kennington loft insulation — common questions
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.
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 Kennington loft rooms, multifoil at around 40mm is the practical alternative.
Do I need planning permission in Kennington?
None of the work we do requires planning permission. If your Kennington property is listed or in a conservation area, that affects the roof covering and external alterations rather than insulation laid inside the roof space, though it is always worth mentioning at survey.
How much does loft insulation cost in Kennington?
We price Kennington jobs after a free survey, itemised so you can see what the insulation, any boarding and any removal each cost. There is no call-out charge and the figure does not move once it is written. The London cost guide explains what drives it.
What happens to the water tank and pipes?
Insulating the loft floor makes everything above it colder, including your tank and pipework. Lagging is therefore part of the work rather than an optional extra, and we will point out anything that looks like it will need attention.
Will this improve my EPC rating?
It is one of the most reliable ways to improve a rating, because depth is a direct input rather than an inferred assumption. How far it moves depends on everything else about the Kennington property, but the direction is not in doubt.
What homeowners say
Reviews from Kennington 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 Kennington 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 Kennington home?
Book a free, no-obligation survey of your Kennington loft and get a fixed price in writing before you decide anything.