SuperQuilt multifoil insulation
A/A+ fire ratedAt roughly 40mm, multifoil delivers serious performance without stealing headroom — which is why it is the answer for Northwood homes with a room in the roof or a sloping ceiling.
North West London loft specialists
Loft insulation in Northwood
If your Northwood 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 Northwood
Fixed written price
No call-out charge
Why it matters
The case for insulating your Northwood 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 Northwood loft is worth spending anything on.
Northwood's homes
Heat loss in Northwood: where it goes
In a typical Northwood property built during the 1890s 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: the interwar semis typically have large, square, walkable lofts — the best candidates in London for boarding as proper storage. We factor that in at survey stage.
Our services in Northwood
Five ways we keep Northwood 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 depthFull-depth mineral wool, fitted with the ventilation path protected and the hatch sealed — the details that decide whether a Northwood loft actually performs.
Loft boarding
Storage-readyBoards laid straight onto joists crush 270mm into 100mm. We batten out instead, so Northwood 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-oneInsulation, boarding, lighting and a ladder handled together in one visit — cheaper and better sequenced than buying the four separately.
Not sure what your Northwood 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 Northwood and the surrounding area
Working across North West London means Northwood rarely stands alone on the schedule — Ruislip and Pinner 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 Northwood
Examples of the work we carry out across the area — insulation, boarding, access and full makeovers.
Questions & answers
Northwood loft insulation — common questions
Do I need planning permission in Northwood?
None of the work we do requires planning permission. If your Northwood 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 Northwood?
There is no single figure, and anyone offering one for Northwood 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.
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?
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.
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 Northwood loft rooms, multifoil at around 40mm is the practical alternative.
What homeowners say
Reviews from Northwood customers
★★★★★
Placeholder review 1 — paste a real customer quote about your work in Northwood here.Customer nameNorthwood · replace with the review date
★★★★★
Placeholder review 2 — paste a real customer quote about your work in Northwood here.Customer nameNorthwood · replace with the review date
★★★★★
Placeholder review 3 — paste a real customer quote about your work in Northwood here.Customer nameNorthwood · replace with the review date
★★★★★
Placeholder review 4 — paste a real customer quote about your work in Northwood here.Customer nameNorthwood · 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
Loft condensation and ventilation — one of our guides, written by the surveyors who assess lofts across Northwood 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 Northwood home?
A free survey, an itemised fixed quote, and a loft that stops costing you money every winter. That is the Northwood offer.