Professional Secondary Glazing Installation London Expert Noise Reduction & Thermal Efficiency
UK's expert installation team reducing noise by up to 80%, improving heat retention by 60%, and enhancing security. Professional installation service across the UK with 25+ years experience.
As London's most trusted certified glazing professionals, we specialise in transforming period properties, listed buildings, and heritage homes without the need for planning permission. Our bespoke secondary glazing solutions are installed by fully certified technicians who understand the unique challenges of Georgian sash windows, Victorian bay windows, and conservation area properties. Whether you're battling traffic noise in Central London or trying to improve energy efficiency in a draughty Edwardian terrace, our expert installation team delivers results that exceed expectations.
Wondering about costs? Use our free Cost Calculator to get instant estimates.
Professional Secondary Glazing Transforming London Homes
UK's expert installation team reducing noise by up to 80%, improving heat retention by 60%, and enhancing security. Professional installation service across the UK with 25+ years experience.
As London's most trusted certified glazing professionals, we specialise in transforming period properties, listed buildings, and heritage homes without the need for planning permission. Our bespoke secondary glazing solutions are installed by fully certified technicians who understand the unique challenges of Georgian sash windows, Victorian bay windows, and conservation area properties. Whether you're battling traffic noise in Central London or trying to improve energy efficiency in a draughty Edwardian terrace, our expert installation team delivers results that exceed expectations.
Wondering about costs? Use our free Cost Calculator to get instant estimates.
Energy Savings
Up to 60% reduction
Sound Insulation
Up to 80% quieter
Why Trust Secondary Glazing Installers
London's Most Trusted Specialists
Professional glazing specialists serving listed buildings, Victorian properties, and modern homes across all London boroughs
With over 1,000 successful installations across London, we've helped homeowners just like you transform their properties. Here's how we can help:
London's Most Trusted Specialists
Professional glazing specialists serving listed buildings, Victorian properties, and modern homes across all London boroughs
Don't just take our word for it—here's what our customers experience after installation:
What Our Customers Say
Real feedback from satisfied customers across London experiencing acoustic secondary glazing and same-day installation. Every installation comes with our satisfaction guarantee.
Common Concerns We Address
•"Will it look ugly or ruin my period features?"
Our slim-profile frames are discreet and complement original windows. Our secondary glazing for listed buildings is approved by many conservation officers because it preserves heritage features.
•"Isn't it expensive?"
Secondary glazing costs 50-70% less than replacement windows, with typical payback in 3-4 years through energy savings.
•"Will installation be messy and disruptive?"
Most homes are completed in a single day with minimal mess. We use dust sheets, clean thoroughly, and respect your home.
•"Can I still open my windows?"
Yes—we design opening systems so you can access your original windows for cleaning and ventilation.
Victoria & James, Camden
Victorian Terrace
Problem:
Living on busy Camden High Street with constant traffic noise affecting sleep. Original Victorian sash windows causing high energy bills and needed Victorian window secondary glazing solution.
"The noise reduction is remarkable—we can finally enjoy peaceful evenings despite the busy road. The installation team completed everything in one day, and our heating bills have dropped by £60 a month. Best investment we've made."
Noise reduction: 20 decibels (75% quieter)
Energy savings: £720 annually
Installation: Single day completion
Windows treated: 8 sash windows
Sarah, Kensington
Listed Georgian Property
Problem:
Grade II listed townhouse with original single-glazed windows. Planning restrictions prevented window replacement while heating costs soared.
"Secondary glazing was the perfect solution—no planning permission needed, and we kept all our period features. The acoustic improvement is incredible, and our heating bills have dropped dramatically. The fitters completely understood our heritage requirements."
Planning status: No permission required
Thermal improvement: U-value 5.2 to 2.1 W/m²K
Original features: All preserved
Payback period: 3.5 years
Michael & Emma, Islington
Ground Floor Flat
Problem:
Severe condensation issues, cold bedrooms, and construction noise next door. Landlord wouldn't approve permanent window replacement.
"Our landlord approved it because it's fully reversible. The condensation has completely disappeared, and we can't hear the building work anymore. Installation took just one afternoon. Worth every penny."
Condensation: 100% eliminated
Noise reduction: 25 decibels
Renter-friendly: Fully reversible
Installation: 4 hours for 6 windows
| Metric | Average Result |
|---|---|
| 🔇Noise Reduction | 18 dB reduction (70% quieter) |
| 💰Energy Savings | 28% lower heating costs |
| ⚡Installation Speed | 85% completed same day |
| ⭐Satisfaction Rating | 4.9/5 stars (500+ reviews) |
| 📊Payback Period | 3-4 years through savings |
Every installation backed by our 5-year guarantee.
Ready to experience these benefits yourself? Here's how simple we make the process:
Our Simple 4-Step Installation Process
From first contact to completion in as little as 2 weeks. Most installations are completed in a single day with our same day secondary glazing installation service.
Step 1: Survey & Quote
Our expert installer visits your property for a thorough assessment and provides a detailed, no-obligation quote.
What happens during the survey:
- Accurate measurements taken for each window
- Discussion of your needs: noise reduction, thermal efficiency, security
- Advice on frame styles, finishes, and glass options
- Consideration of any heritage or planning requirements
- Transparent quote provided on the spot or within 24 hours
✅ You receive:
- • Detailed written quotation
- • Technical specifications and drawings
- • Expected performance gains (acoustic, thermal)
- • Proposed installation schedule
No high-pressure sales tactics. We aim to provide clarity and confidence.
Book Your Free SurveyStep 2: Custom Manufacturing
Upon your approval, your secondary glazing units are precisely manufactured to your exact window specifications.
- Manufactured to exact dimensions from your survey
- High-quality materials sourced from UK suppliers
- Frames finished in your choice of colour (e.g., white, black, silver, RAL colours)
- Glass options selected for optimal acoustic and thermal performance
- Rigorous quality control throughout production
✅ What we confirm:
- • Final frame and glass specifications
- • Agreed installation date and time
- • Pre-installation preparation guidelines
Step 3: Professional Installation
Our skilled and insured installation team transforms your windows, ensuring minimal disruption.
Morning:
- Protecting your home with dust sheets
- Precise fitting of secondary frames
- Secure fixing methods
Afternoon:
- Installing glass panels and sealing
- Fitting hardware and ensuring smooth operation
- Thorough cleanup and waste removal
✅ Key benefits:
- • Minimal mess and disruption
- • No damage to original windows
- • Efficient and tidy
Most installations are completed within a single day. Larger projects may take two days.
Step 4: Handover & Aftercare
We ensure you're satisfied and provide support for years to come.
Before we leave:
- Full demonstration of operation and care
- Provision of your 5-year guarantee documentation
- Emergency contact information provided
Post-installation:
- • Follow-up call to confirm satisfaction
- • Annual maintenance reminders
- • Lifetime technical support
- • Warranty covers defects, hardware, glass, and workmanship
Total timeline: Approx. 3-4 weeks from survey to installation
Popular Secondary Glazing Solutions
Explore our specialist solutions tailored to your specific property type and requirements
Sash Windows
Expert solutions for Victorian and Georgian sash windows
Bay Windows
Bespoke panels for complex bay window configurations
Casement Windows
Hinged panel solutions for modern casement windows
Professional Service Across London
Local expertise for your area, with specialist knowledge of heritage properties and planning requirements.
Westminster & Belgravia
W1Mayfair & Marylebone
SW3Chelsea
SW7South Kensington
NW1Camden
N1Islington
W8Kensington
W2Bayswater
SW5Earls Court
SW10West Chelsea
E1Whitechapel
SE1Southwark
We serve all London postcodes, from Central London to outer boroughs and affluent surrounding areas.
Common Questions
Get answers to frequently asked questions about secondary glazing
How much does secondary glazing cost?
See our complete 2026 price guide with costs for every window type.
Does it really reduce noise?
Yes, up to 80% noise reduction. See our acoustic performance data.
Can I install it myself?
Explore our DIY kits designed for homeowner installation.
Is it suitable for listed buildings?
Perfect for heritage properties. Learn about conservation approval.
Common Questions
Get answers to frequently asked questions about secondary glazing
Secondary glazing costs typically range from £200-£600 per window depending on size, specification, and opening type. A standard Victorian sash window with slim-profile secondary glazing costs around £350-£450 fully installed. Our instant calculator provides accurate pricing, or request a free survey for a detailed quote.
Yes, significantly. Secondary glazing creates a 100mm+ air gap between panes—much wider than double glazing's 12-20mm gap. This achieves acoustic performance up to 80%, effectively blocking traffic noise, aircraft noise, and neighbour noise. For maximum performance, we use 6.8mm laminated glass in our specialist noise reduction systems.
While DIY secondary glazing kits exist, professional installation ensures optimal performance and longevity. Our installers achieve perfect alignment, proper sealing, and secure fixing—critical for noise reduction and energy efficiency. Plus, professional installation includes warranty protection and building regulation compliance where required. Learn more about DIY vs professional installation.
Absolutely. Secondary glazing is the preferred solution for listed buildings because it's fully reversible and doesn't alter the external appearance. We have extensive experience working with conservation officers and can assist with listed building consent applications. Most installations require no consent as they're internal additions. Read our listed building guide for more information.
Ready to Transform Your Home?
Book your free installer survey today. Certified installation specialists with no obligation quotes guaranteed.