Loft Insulation, Boarding & Conversion Specialists
Loft Insulation, Boarding & Conversion Specialists in Westminster.
Fully insured loft specialists covering Marylebone, Mayfair, Pimlico and every corner of the borough. Free no-obligation survey, honest diagnosis, and a fixed price before any work begins.
- Free, no-obligation survey before any work begins
- Fully insured on every job, from a single insulation top-up to a full conversion
- Fixed prices agreed upfront — no hidden charges, no surprises
- Correct diagnosis first — we tell you if it's insulation, boarding, or a full warm-roof conversion you need
- 12-month workmanship guarantee on all loft work
Request a Free Loft Survey
We usually respond within one working day. No obligation.
🔒 No spam, no obligation. We usually get back to you within one working day.
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33
£0
12mo
Fully Insured
Free No-Obligation Survey
Fixed-Price Quotations
12-Month Guarantee
Part of the Brilliant Group
London-Wide Coverage
10 Loft Services Across Westminster
From a straightforward insulation top-up to a full Velux loft conversion — or a same-day emergency callout — we cover every loft need across Westminster. All work is carried out at a fixed price agreed before we start.
Loft Insulation
Insulation laid between and over the joists — for lofts that stay a storage space.
Warm Roof Insulation
Insulation fitted along the rafters — required for a habitable loft conversion.
Loft Boarding
Raised or standard boarding systems that protect your insulation depth.
Loft Storage Conversion
A complete usable storage space — boarding, pull-down ladder and loft lighting.
Velux (Rooflight) Loft Conversion
A rooflight conversion within your existing roofline, no dormer or mansard.
Loft Home Office Conversion
A quiet, insulated workspace built within a Velux-style conversion.
Loft Bedroom with En-Suite
An extra bedroom and en-suite within your loft's existing roofline.
Staircase Installation
Space-saving staircase design and installation to building regulations.
Structural Steel & Beam Installation
Steel and beam work to open up floor spans, engineer sign-off included.
Emergency Loft Solution London
Storm or flood water in your loft? Same-day removal of soaked insulation and emergency drying.
Common Loft Jobs & Prices
A free survey is carried out before any work begins. Boarding and conversion jobs vary widely by loft size, access and existing insulation depth, which is exactly why quotes differ so much between companies — prices below are indicative starting points, confirmed once your free survey is complete.
Loft Insulation Top-Up
Top up existing mineral wool to the 270mm standard
Loft Boarding (Standard)
Standard boarding over existing insulation depth
Loft Boarding (Raised)
Raised-system boarding that protects full insulation depth
Loft Storage Conversion
Full package — boarding, pull-down ladder and loft lighting
Warm Roof Insulation
Rafter insulation for a habitable loft conversion, per m²
Velux Window Installation
Supply and fit of a single rooflight window
Loft Conversion Survey
Full assessment for a Velux, home office or en-suite conversion
£0
Staircase Installation
Space-saving staircase, designed to building regs
Structural Steel Beam
Steel or beam installation, engineer sign-off included
Emergency Loft Solution
Same-day wet insulation removal and emergency drying
Why loft quotes vary — and our fixed price policy:
Loft boarding and conversion prices can vary hugely between companies — usually because of differences in loft size, hatch access, existing insulation depth, and whether a raised or standard boarding system is genuinely needed. We explain which of these apply to your loft during the free survey, then agree a fixed price before any work begins. No call-out charge. No surprise extras.
What Makes Us Different
Correct Diagnosis First
Loft Insulation and Warm Roof Insulation solve different problems. We diagnose which one your loft actually needs before recommending any work.
Fixed Prices & Free Survey
Every job starts with a free, no-obligation loft survey. Once we've assessed the work, you receive a fixed price — agreed before we start.
Fully Insured, Every Job
Every loft job — whether a single insulation top-up or a full conversion — is covered by our public liability insurance from the moment our installer arrives.
Local Borough Knowledge
From typical joist spacing to common roof constructions in your area, our installers know the loft types found across London's boroughs.
Part of the Brilliant Group
The loft division of the same team behind Brilliant Plumbing and Brilliant Roofing Group's London operations — same standards, applied to a new trade.
12-Month Guarantee
Every loft job comes with a 12-month workmanship guarantee. If any work we've completed develops a fault, we return and fix it at no charge.
The Process
How to Book a Loft Service in London
Four simple steps from your first call to a fully guaranteed job.
Call or Request Online
Call our team or fill in the form above. Tell us your borough, roughly what you need, and your contact details. Takes under 2 minutes, no commitment.
Free Loft Survey
We arrange a free, no-obligation survey at your property. Your surveyor inspects the loft in full and explains exactly what it needs.
Fixed Quote You Approve
Based on the survey, we give you a fixed price. No pressure, no hidden extras. Work won't start until you approve it.
Installed & Guaranteed
Work completed to a high standard. Your home left clean and tidy. 12-month guarantee certificate emailed the same day.
Customer Reviews
What London Homeowners Say
We’re a new business, so there’s no review history to show yet. The three cards below are sample placeholders, illustrating how real, verified reviews will display once we’ve collected them.
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Jake F.
Mayfair · Warm Roof Insulation
“Explained why our loft conversion needed rafter insulation rather than just topping up the floor. Fixed price, as quoted.”
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Layla I.
Bayswater · Loft Boarding
“Recommended a raised boarding system once they saw how deep our insulation was. No pressure to upgrade unnecessarily.”
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Craig A.
Victoria · Velux Loft Conversion
“Full Velux conversion on our terraced house. On time, tidy and professional throughout. Guarantee certificate received the same day.”
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Frequently Asked Questions
All Your Most Common Questions Answered
Cost depends on your loft's current insulation depth, access, and whether it's rolls, boards, or professionally blown insulation. We confirm an exact price after a free survey — there's no charge for the visit and no obligation to proceed.
Loft Insulation is laid flat between and over the joists, on the loft floor — the "cold roof" method, used when the loft stays an unused storage space. Warm Roof Insulation is fitted along the rafters, on the roof slope — the "warm roof" method, required whenever the loft becomes a habitable room, such as with a Velux conversion. They solve different problems and aren't interchangeable.
Often not — many Velux (rooflight) conversions fall under Permitted Development rather than requiring full planning permission. However, this has genuine limits: volume allowances for extensions, conservation area restrictions, and flats or maisonettes are generally excluded from Permitted Development rights. We'll confirm your specific situation during the survey rather than assume.
Not directly, with standard boarding — laying boards straight onto mineral wool insulation compresses it and reduces how well it performs. A raised boarding system lifts the boards above the insulation on a supporting frame, preserving full insulation depth while still giving you usable storage space.
Yes. We cover every one of the 33 London boroughs, including all inner and outer London areas, with local teams who know the loft types common to each area.
Yes. All loft insulation, boarding, and conversion work comes with a 12-month workmanship guarantee. If anything we've carried out develops a fault within 12 months, we return and repair it at no charge.
Service Areas
Areas We Cover Within Westminster
Westminster’s loft spaces vary hugely — from Georgian townhouse and Victorian mansion block lofts, across Marylebone and Paddington. Local experience matters, and we cover every corner of the borough.
Get Started
Ready to Book Your Westminster Loft Project?
A free survey removes the risk — you know the exact cost before we touch your loft. Fixed prices, serving every part of Westminster and neighbouring boroughs.
DW
David W.
★★★★★
Every job starts with a free survey — we assess your loft, explain what it actually needs, and you decide whether to proceed. No pressure, no obligation.
Free, No-Obligation Survey
SM
Stephanie M.
★★★★★
Every loft job comes with a written 12-month workmanship guarantee. If anything we’ve done develops a fault, we return and fix it at no charge.