SuperQuilt multifoil insulation
A/A+ fire ratedWhere a Isleworth 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.
West London loft specialists
Loft insulation in Isleworth
Our installers work in Isleworth and across the wider West London area every week, which means we know what is behind the hatch before we open it. That familiarity is why our quotes hold and why the job usually takes a day rather than three.
Free survey in Isleworth
Fixed written price
No call-out charge
Why it matters
The case for insulating your Isleworth 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
Those figures are national, but the logic is entirely local: the roof over a Isleworth house is the cheapest part of it to improve, and the part losing the most.
Isleworth's homes
Why Isleworth lofts need attention
Isleworth forms part of West London, an area whose housing is characterised by Victorian terraces, large Edwardian villas, extensive interwar suburban development and post-war blocks. The bulk of it went up during the 1880s 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 Isleworth 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'.
The 1930s suburban expansion here produced thousands of near-identical semis, which means the same loft problems repeat street after street. It is the sort of thing a survey establishes in ten minutes and a phone quote never can.
Our services in Isleworth
Five ways we keep Isleworth 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 Isleworth homes this is the single highest-value thing you can do to the building.
Loft boarding
Storage-readyStorage that does not flatten your insulation. We raise the deck on battens so the full depth survives underneath — the version most Isleworth lofts should have had first time.
Loft ladders
Fitted in a dayMany older Isleworth 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-oneInsulation, boarding, lighting and a ladder handled together in one visit — cheaper and better sequenced than buying the four separately.
Not sure what your Isleworth 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 Isleworth and the surrounding area
Working across West London means Isleworth rarely stands alone on the schedule — Hounslow and Richmond are all within the same round. If your address sits between them, ring and we will confirm.
In the loft
Loft work in and around Isleworth
Examples of the work we carry out across the area — insulation, boarding, access and full makeovers.
Questions & answers
Isleworth loft insulation — common questions
Do you work in the streets around Isleworth?
Yes — we cover Isleworth and the whole surrounding area, and our teams are usually working somewhere nearby on any given week. If your street is not obviously listed on our coverage page, ring us anyway; the list is not exhaustive.
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 Isleworth loft for storage afterwards?
Yes, provided the boarding is raised. Screwing boards straight onto 100mm joists over 270mm of wool compresses it to a third of its depth and throws away most of what you paid for. We fit raised boarding on battens so the insulation stays at full depth underneath.
How much does loft insulation cost in Isleworth?
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 Isleworth quote follows a free survey rather than a phone call. Once given, the price is fixed. Our cost guide sets out each variable.
What homeowners say
Reviews from Isleworth customers
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Worth reading before you book
Loft condensation and ventilation — one of our guides, written by the surveyors who assess lofts across Isleworth 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 Isleworth home?
Tell us about your Isleworth loft and we will arrange a survey, usually within the same week.