Acoustic Secondary Glazing: Noise Reduction Costs & Performance
Maximum noise reduction: 45-55 decibels
Cost & Performance Comparison
| Glass Type | Noise Reduction | Best For | Cost/Window |
|---|---|---|---|
| Standard 4mm | 25-35 dB | Light traffic noise | £150-250 |
| 6mm Laminate | 35-45 dB | Moderate traffic | £250-400 |
| 6.8mm Acoustic | 45-50 dB | Heavy traffic, railways | £350-500 |
| 10.8mm+ Acoustic | 50-55 dB | Flight paths, major roads | £450-600 |
What Noise Levels Mean
35 dB Reduction
Heavy traffic → Quiet conversation level
45 dB Reduction
Busy road → Library quiet
55 dB Reduction
Aircraft noise → Peaceful bedroom
Decibel Comparison Chart
Did you know? A 10dB reduction is perceived by the human ear as a 50% reduction in noise. Our acoustic solutions can make a London street sound like a quiet library.
Real-World Noise Reduction Examples
See how acoustic secondary glazing reduces noise in common scenarios
Busy Road Traffic
Heavy traffic on main road
Before Installation
Standard single or double glazing
After Installation
From 'loud conversation' to 'quiet office'
Interactive Comparison
Current Noise Level
70 dB
Reduction
-0 dB
What this means: At 0% effectiveness, the noise level is reduced from 70 dB to 70 dB. This is equivalent to reducing the perceived loudness by approximately 0%.
Decibel Scale Reference
Whisper
Moderate Rain
Conversation
Vacuum
Alarm Clock
Lawnmower
Every 10 dB reduction represents approximately 50% less perceived loudness
Cost-Benefit Analysis
Example: Bedroom Facing Busy Road
Benefits:
- • Sleep quality improvement (priceless)
- • Property value increase: +2% (£500-1,000)
- • Stress reduction from quieter home
- • Easier to rent/sell property
Material Options & Costs
6.8mm Acoustic Laminate
Most popular choice - optimal noise reduction
- 45-50dB noise reduction (70% perceived quieter)
- PVB interlayer dampens sound vibrations
- Perfect for busy roads and railways
10.8mm+ Acoustic Laminate
Maximum performance for extreme noise
- 50-55dB reduction (85% perceived quieter)
- Triple-layer construction for maximum mass
- Ideal for flight paths and major motorways
Cost Breakdown by Window Size
| Window Size | 6.8mm Acoustic | 10.8mm+ Acoustic | Installation |
|---|---|---|---|
| Small (600×900mm) | £300-400 | £400-500 | £80-120 |
| Medium (1200×1200mm) | £400-500 | £500-600 | £100-150 |
| Large (1500×1500mm) | £500-650 | £650-800 | £120-180 |
| Patio Door (2000×2000mm) | £700-900 | £900-1,200 | £150-250 |
Installation Process
Noise Survey
Professional assessment of noise sources, frequencies, and current dB levels to select optimal glass specification.
Custom Specification
Acoustic laminate cut to size with careful attention to gap dimensions (100-200mm air gap maximizes performance).
Seal Installation
Premium acoustic seals fitted to frame - critical for performance. Even small gaps dramatically reduce effectiveness.
Performance Testing
Optional: Before/after dB measurements to verify noise reduction targets have been achieved.
Acoustic vs Standard Systems
| Feature | Standard 4mm | 6.8mm Acoustic | 10.8mm Acoustic |
|---|---|---|---|
| Noise Reduction | 25-35 dB | 45-50 dB | 50-55 dB |
| Traffic Noise | Moderate reduction | Excellent | Outstanding |
| Low Frequency | Limited | Good | Excellent |
| Weight | Light | Moderate | Heavy |
| Price Premium | Baseline | +60% | +100% |