Loft Insulation Specialists
Loft Insulation Hounslow
Insulation laid between and over the joists to keep heat in and bills down — the right choice when your loft stays a storage space, not a room. Free survey, fixed price, 12-month guarantee.
- 270mm mineral wool depth, to current standards
- Free, no-obligation survey before any work begins
- Fixed price agreed before we start — no surprises
- Rolls, boards or professionally blown insulation, whichever suits your loft
- 12-month workmanship guarantee
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.
270mm
33
£0
12mo
24/7
Fully Insured
Free No-Obligation Survey
Fixed-Price Quotations
12-Month Guarantee
Part of the Brilliant Group
London-Wide Coverage
Insulation on the Loft Floor, Not the Roof Slope
Loft Insulation — sometimes called the “cold roof” method — is laid flat between and over the ceiling joists. It keeps heat inside the rooms below, while the loft itself stays cold and unheated. This is different from Warm Roof Insulation, which is fitted along the rafters and is only needed when the loft becomes a habitable room.
270mm Is the Current Standard
Older homes are often insulated to only 100mm or less. Topping up to 270mm mineral wool is the current recommended depth.
DIY-Able, With Limits
Rolls and boards can be a competent DIYer's project. Blown (loose-fill) insulation needs specialist equipment and is professional-only.
Grants May Be Available
Government schemes including the Warm Homes Plan periodically offer support toward loft insulation costs — we'll point you in the right direction.
Signs You Need More
Cold ceilings, high heating bills, or visible thin/patchy insulation when you look in the loft hatch are all signs it's worth a free survey.
Converting the Loft Instead?
If you're turning the loft into a room, you need Warm Roof Insulation instead — see the difference here.
Fully Insured, Every Job
Public liability insurance covers every survey and installation we carry out, on every job.
Loft Insulation Prices
Cost depends on your loft’s current insulation depth, access, and whether rolls, boards or professionally blown insulation is right for your loft. A free survey confirms the exact fixed price.
Insulation Top-Up
Top up existing insulation to the 270mm standard
Full Re-Insulation
Remove old, damaged or contaminated insulation and start fresh
Blown (Loose-Fill) Insulation
Machine-blown insulation for awkward or restricted loft spaces
Free Survey
Full assessment of your current insulation and what it needs
£0
Our fixed price policy:
The price agreed after your free survey is the price on your invoice. No call-out charge, no surprise extras.
What Makes Us Different
Loft Insulation — sometimes called the “cold roof” method — is laid flat between and over the ceiling joists. It keeps heat inside the rooms below, while the loft itself stays cold and unheated. This is different from Warm Roof Insulation, which is fitted along the rafters and is only needed when the loft becomes a habitable room.
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.
er
Emma R.
Hounslow · Loft Insulation Top-Up
“Only had about 80mm up there. They topped it up to 270mm in a morning and the price matched the quote exactly.”
Verified
dk
Daniel K.
Hounslow · Blown Insulation
“Our loft has awkward corners that rolls wouldn’t have reached. Blown insulation filled every gap properly.”
Verified
fa
Fatima A.
Hounslow · Full Re-Insulation
“They explained we only needed floor insulation, not a full warm-roof job. Honest advice, no upselling.”
Verified
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 part of Hounslow — Hounslow Town, Chiswick, Brentford and Isleworth included — as well as all of London's other 32 boroughs. See all our Hounslow loft services.
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
Loft Specialists in Your Borough
London’s loft spaces vary hugely — from small Victorian terrace lofts to larger post-war semis and new-build roof voids. Local experience matters. Our teams know the roof types common in your borough.
Get Started
Ready for Proper Loft Insulation in Hounslow?
A free survey removes the risk — you know the exact cost before we touch your loft. Fixed prices, available across all 33 London 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.