SuperQuilt multifoil insulation
A/A+ fire ratedAt roughly 40mm, multifoil delivers serious performance without stealing headroom — which is why it is the answer for Lewisham homes with a room in the roof or a sloping ceiling.
South East London loft specialists
Loft insulation in Lewisham
Roughly a quarter of an uninsulated home's heat escapes through the roof. For Lewisham homeowners that is the cheapest problem in the house to fix, and the one most likely to have been fixed badly the first time. We do it properly.
Free survey in Lewisham
Fixed written price
No call-out charge
Why it matters
The case for insulating your Lewisham 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 Lewisham house is the cheapest part of it to improve, and the part losing the most.
Lewisham's homes
What we find in Lewisham roof spaces
The roofs over Lewisham are mostly pitched tile and slate roofs with reasonable head height, and hipped ends on the interwar semis that reduce the usable void, and they were built during the 1880s through the 1930s for a housing market with no expectation of thermal performance. Insulation arrived later, retrofitted into spaces never designed to accommodate it, and the results vary enormously from street to street.
On survey we routinely find the same handful of problems: material compressed to a fraction of its depth by boards laid straight onto the joists, insulation packed hard into the eaves and sealing off the roof's only ventilation path, hatches left as bare uninsulated panels, and recessed downlighters buried under wool. None of these are exotic and all of them are fixable — but they need finding first.
Hipped roofs on 1930s semis cut the usable loft area down sharply at the corners, which changes how much of it is worth boarding, which is one more reason we measure rather than assume.
Our services in Lewisham
Five ways we keep Lewisham 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 Lewisham homes this is the single highest-value thing you can do to the building.
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 Lewisham footprint.
Loft ladders
Fitted in a dayMany older Lewisham 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-oneOne team, one survey, one sequence of work. The insulation depth sets the batten height, the batten height sets the ladder landing — which is why doing it piecemeal costs more.
Not sure what your Lewisham 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 Lewisham and the surrounding area
Lewisham sits within South East London, and our teams regularly work in neighbouring areas including Catford and New Cross. If you are just outside Lewisham itself, we almost certainly already cover your street.
In the loft
Loft work in and around Lewisham
Examples of the work we carry out across the area — insulation, boarding, access and full makeovers.
Questions & answers
Lewisham loft insulation — common questions
Will this improve my EPC rating?
Usually, and often noticeably. Loft insulation depth is recorded directly by the assessor, so increasing it from 100mm to 270mm generally moves the rating. We hand over product documentation and declared performance figures so your assessor records what is actually there.
Can I still use my Lewisham 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.
What happens to the water tank and pipes?
Pipes get lagged and the tank gets insulated on the sides and top only. Leaving the base open is deliberate — it is the only thing preventing a frozen tank in a hard winter.
Do you offer free surveys in Lewisham?
Free, with no call-out fee and no pressure. A meaningful proportion of our Lewisham surveys conclude that the loft is already adequately insulated and the homeowner should keep their money — which is a perfectly normal outcome.
How much does loft insulation cost in Lewisham?
There is no single figure, and anyone offering one for Lewisham without seeing the loft is guessing. The largest swing factor is almost always whether the existing material can be topped over or has to be stripped out and disposed of. We survey free of charge and quote a fixed price afterwards.
Do you remove the old insulation?
It depends what is up there. Cross-laying a new layer over sound existing material is both cheaper and perfectly correct. Failed, contaminated or loose-fill material is stripped, bagged and disposed of — slow work, and we show it as its own line on the quote.
What homeowners say
Reviews from Lewisham customers
★★★★★
Placeholder review 1 — paste a real customer quote about your work in Lewisham here.Customer nameLewisham · replace with the review date
★★★★★
Placeholder review 2 — paste a real customer quote about your work in Lewisham here.Customer nameLewisham · replace with the review date
★★★★★
Placeholder review 3 — paste a real customer quote about your work in Lewisham here.Customer nameLewisham · replace with the review date
★★★★★
Placeholder review 4 — paste a real customer quote about your work in Lewisham here.Customer nameLewisham · 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 Lewisham 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 Lewisham home?
We will look at your Lewisham loft, measure what is there and tell you honestly whether it needs work. No charge either way.