16th Sep 2025

The Different Types of Double Glazing Explained: Which Option is Right for Your Home?

Key takeaways

• Standard double glazing uses two panes of glass with an air gap, offering excellent thermal insulation and energy savings for most Bristol homes
• Low-E glass features a special coating that reflects heat back inside, reducing heating bills by up to 30% compared to ordinary glass
• Acoustic glass provides superior sound insulation, perfect for properties near busy roads or Bristol’s city centre
• Laminated glass combines security benefits with noise reduction, making it ideal for ground floor windows
• Triple glazing offers maximum thermal efficiency, though high-quality double glazing units often provide better value for money

Choosing the right type of double glazing can feel overwhelming, especially when you’re bombarded with technical terms and conflicting advice. The truth is, not all double glazing is created equal, and what works perfectly for a Victorian terrace in Henleaze might not be the best solution for your modern apartment overlooking the harbour.

Recent industry data shows that homeowners can reduce their energy bills by around £150 annually simply by upgrading from single or simply dated glazing to quality double glazing units. However, with options ranging from standard double glazing to triple glazing, low-E coatings to acoustic glass, understanding which type suits your specific needs is crucial.

We’ve been helping Bristol homeowners navigate these choices for years, installing everything from elegant sash windows in period properties to contemporary casement windows in new builds. Whether you’re battling heat loss, road noise or simply want to improve your home’s aesthetic appeal, there’s a glazing solution that’s perfect for your situation.

What are the main types of double glazing available?

Each type of double glazing serves different purposes, from basic thermal insulation to specialised noise reduction and enhanced security.

Standard double glazing

Standard double glazing consists of two panes of glass separated by a sealed air gap, typically 16-20mm wide. This creates a barrier that dramatically reduces heat transfer compared to single glazing, making your home warmer in winter and cooler in summer.

The space between the glass panes acts as thermal insulation, preventing warm air from escaping and cold air from entering. This popular option works brilliantly for most Bristol homes, offering excellent energy savings without breaking the budget.

Low-E glass double glazing

Low-E (low emissivity) glass features an invisible special coating that reflects heat back into your room whilst allowing natural light to pass through. Think of it as a one-way mirror for heat, it keeps warmth inside during winter and reflects excessive heat away during summer.

This type of glass can reduce heat loss significantly compared to ordinary glass, leading to noticeable reductions in your heating bills. The coating is so thin you won’t even notice it’s there, maintaining crystal-clear views whilst improving your home’s thermal efficiency.

Acoustic glass double glazing

If you live near busy roads or Bristol’s bustling city centre, acoustic glass could transform your quality of life. This specialised glazing uses different thicknesses of glass panes to disrupt sound waves effectively.

Acoustic glass can reduce external noise levels by 40-50 decibels, turning the rumble of traffic into a gentle whisper. It’s particularly popular for bedrooms, home offices and living areas where peace and quiet matter most.

Laminated glass double glazing

Laminated glass features a tough plastic interlayer sandwiched between two panes of glass, similar to a car windscreen. If the glass breaks, the pieces stick to this layer rather than shattering everywhere, providing increased safety and security benefits.

Beyond security, laminated glass also offers excellent sound insulation and blocks 99% of harmful UV rays that can fade your furniture and carpets. It’s an ideal choice for ground floor windows and French doors where security is a priority.

Triple glazing

Triple glazing adds a third pane of glass for maximum thermal efficiency and sound insulation. However, high-quality double glazing with low-E coatings often provides better value for money and performance than budget triple glazing units.

The extra glass pane makes windows heavier and more expensive, and the benefits in the UK’s moderate climate are often marginal compared to premium double glazing. We typically recommend triple glazing only for specific situations, such as extremely exposed properties.

What window styles work with different glazing types?

All our glazing options are available across our complete range of window styles, ensuring you don’t have to compromise on aesthetics for performance.

• Casement windows – The most popular choice in the country, these hinged windows open outward and suit any type of double glazing. Perfect for maximising natural light and air circulation
• Flush casement windows – These sit flush with the frame when closed, offering a sleek contemporary appearance that works beautifully with low-E glass
• Residence 7 & 9 windows – Premium uPVC windows that replicate the look of traditional wooden windows, ideal for period properties when combined with acoustic glass
• Tilt & turn windows – European-style windows that tilt inward for ventilation or swing open fully for cleaning, excellent with laminated glass for security
• Vertical sliding sash windows – Perfect for period properties, these traditional-style windows work wonderfully with low-E glass to maintain authenticity whilst improving energy efficiency

Frequently asked questions

Which type of double glazing offers the best energy savings? Low-E glass typically provides the best balance of energy efficiency and cost-effectiveness, reducing heat loss by up to 30% compared to standard glazing whilst allowing maximum natural light.

Is triple glazing worth the extra cost in Bristol’s climate? For most Bristol homes, high-quality double glazing with low-E coatings offers better value than triple glazing, providing excellent thermal efficiency at lower cost whilst being lighter and easier to operate.

Can acoustic glass help with noise from busy roads? Yes, acoustic glass can reduce external noise levels by 40-50 decibels, making it highly effective for properties near busy roads, railways or Bristol’s city centre areas.

Who are Associated Windows?

We’re Bristol’s trusted double glazing experts, serving homeowners across Bristol, Bath, South Gloucestershire and Somerset for many years. As a Which? Trusted Trader with excellent TrustPilot ratings, we provide honest advice and exceptional installations without any hard-sell tactics.

Our comprehensive range includes all the glazing types mentioned above, available in uPVC windows (casement, flush casement, Residence 7&9, tilt & turn, and vertical sliding sash windows) and premium aluminium windows from Origin and Reynaers. We also supply French doors, patio doors and bi-fold doors to complement your new windows.

Visit our friendly showroom at 32-34 Gloucester Road North, Filton (just off the M5 at Cribbs Causeway Junction) to see our range in person. With free parking, a children’s play area and plenty of tea and coffee, we’ll help you explore the options without pressure.

Ready to discover which type of double glazing is perfect for your Bristol home? Contact us on 0117 9311777 or email enquiries@associatedwindows.co.uk for your free, no-obligation quote. Our experienced team will assess your needs and recommend the ideal glazing solution for your property and budget.