The VELUX Group Glazing Guide
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Sterlingbuild - Pitched Roof Windows
- 5 Aug 2025
- 358views
- Reading time: 3 minutes


VELUX Glazing Options Explained: Find the Right Glass for Your Roof Window
Choosing the right glazing for your VELUX roof window is just as important as choosing the window itself. Whether you want better insulation, noise reduction, or just something easy to clean, there’s a glazing option that’s perfect for your home.
In this guide, we’ll break down the different VELUX glazing types so you can make the right choice with confidence.


Standard Glazing Options
These are the most popular choices for everyday use, offering great performance and value for money.
⭐ Glazing 70 - Made for Comfort
Best for: General use, bedrooms, living rooms
2-layer glass with good insulation and protection
Reduces rain noise
Laminated safety glass
UV filter
Toughened outer pane
Great all-round choice at a competitive price
⭐⭐ Glazing 68 - Made for Better Comfort
Best for: Rooms where warmth and insulation are a priority
3-layer glass for extra insulation
All the benefits of Glazing 70, plus better energy efficiency
Keeps rooms warmer in winter
Ideal for loft conversions and bedrooms


⭐⭐⭐ Glazing 66 - Made for Well-being
Best for: Homeowners who want peace and quiet
Blocks outside noise
Easy-clean and anti-dew coatings
Minimises condensation on the outside
Better sound insulation than Glazing 68
Perfect for homes near busy roads or with noise concerns
⭐⭐⭐⭐ Glazing 67 - Made for the Best Experience
Best for: Premium builds or energy-efficient homes
Top-performing 3-layer glazing
Combines excellent insulation, soundproofing, and comfort
Helps maintain indoor temperatures and reduce energy bills
VELUX’s best-performing standard glazing


Special Glazing Options
These are designed for more specific needs - like added heat protection, noise control, or security.
Glazing 69 - Made for Heat Protection
Best for: Sunny rooms or south-facing roofs
Blocks heat from the sun while letting in light
3-layer glazing with high thermal efficiency
Keeps rooms cooler in summer
Great for sunrooms, extensions, and hot climates
Glazing 62 - Made for Noise Reduction and Comfort
Best for: Homes in loud areas
Up to 42 dB sound insulation
Reduces outdoor noise significantly
Combines noise control with insulation
Ideal if you live near traffic, airports, or train lines


Glazing 70Q - Made for Extra Security
Best for: Ground floor or low-roof windows
Certified burglary-resistant glazing
Laminated inner pane and toughened outer pane
Prevents forced entry and accidental breakage
Peace of mind for security-conscious homeowners
Glazing 15 - Made for Better Comfort (Low Pitch)
Best for: Low-pitch roof windows (e.g. VELUX GBL)
Similar performance to Glazing 68
Specifically designed for roof windows with a lower pitch
Offers insulation and energy efficiency
Perfect for modern extensions or flat-roof-style pitches
Summary Table
| Glazing Type | Best For | Glass Layers | Sound Insulation | Special Features |
|
70 |
General comfort | 2 | 35-38 dB | UV, safety, toughened |
| 68 | Energy efficiency | 3 | 35 dB | Extra insulation |
| 66 | Noise & easy clean | 3 | 37 dB | Anti-dew & noise block |
| 67 | Top performance | 3 | 38 dB |
Best insulation & noise block |
| 69 | Heat protection | 3 | 35 dB | Reduces solar heat |
| 62 | Maximum sound block | 3 | 42 dB | Quietest glazing |
| 70Q | Security | 2 | 35 dB | Burglary-resistant |
| 15 | Low pitch roofs | 3 | 35 dB | For GBL / low roof angles |
Still not sure which glazing to choose?
Our team is here to help you pick the best option based on your space, budget and lifestyle.
Call us on 0208 830 7000
Or email us at sales@sterlingbuild.co.uk




