How to choose between 60/70/80/108 series thermal break aluminum windows and doors?
When choosing aluminum alloy windows, many people only focus on the type of material (ordinary aluminum alloy or thermal break aluminum alloy), brand, and opening method (casement or sliding). However, in our industry, we often mention the 60, 70, 80, and 108 series, and most people are confused when they see these numbers:
3.Which series should I choose?
SGL has compiled the differences between all common series to help you make the right choice.
What Do 60 / 70 / 80 / 108 Series Mean?
These numbers refer to the width of the aluminum profile's cross-section:
60series
Profile Width60mm
Basic residential use
70series
Profile Width70mm
Better insulation & stability
80series
Profile Width80mm
High wind pressure resistance
108series
Profile Width108mm
Large frames, high-end performance
Note: Typically, profiles are available in several wall thicknesses, including 1.4mm, 1.6mm, 1.8mm, 2.0mm, and 3.0mm.
A larger number indicates a more robust material structure.
Why is width important?
The 108 series offers optimal energy efficiency and sealing, but occupies more window sill space and is also more expensive.
Wider profiles represent better wind pressure resistance.
Larger internal spaces mean more seals/insulation chambers.
Thicker glass compatibility means better sound insulation.
Larger windows offer greater stability.
Differences Between 60 / 70 / 80 / 108 Series
Profile Width
60 series: 60 mm
70 series: 70 mm
80 series: 80 mm
108 series: 108 mm
The larger the number, the more robust the frame and the more complete the sealing structure it can support.
Insulation Strip Dimensions
|
Series |
Common Insulation Strip Width |
|
60 Series |
20 mm |
|
70 Series |
25 mm |
|
80/108 Series |
30–32 mm or double-layer insulation strip |
Compatible Glass Thickness
Series Typical Glass Structure
60 series 5 + 15A + 5 mm / 5 + 18A + 5 mm
70 series 5 + 24A + 5 mm / 5 + 27A + 5 mm
108 series Triple glazing or thicker IGUs
The thicker the glass, the better the sound insulation and heat insulation effects.
Price Differences
Even a slight increase of a few millimeters in the series number significantly increases the amount of materials consumed.
Price ranking:
60 < 70 < 80 < 108
Higher series require more aluminum, more glass, and more sealing components.
Which Series Should You Choose?
✔ 60 Series
Suitable for: Ordinary residences, limited budgets, low-rise buildings, stable wind pressure environments
Advantages: High cost-effectiveness, sufficient to meet basic functions
✔70 Series (Most common)
Suitable for: Most urban families, higher sound insulation requirements
Advantages: Better glass configuration, stronger stability
✔ 80 Series
Suitable for: High-rise buildings, coastal areas, windy areas
Advantages: Strong wind pressure resistance, better safety
✔ 108 Series (High-end series)
Suitable for: Large floor-to-ceiling windows, large balcony enclosures, upgraded housing
Advantages: Best sound insulation, thermal insulation, and sealing performance
Disadvantages: Takes up windowsill space, highest price
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Overall, all the different series essentially perform the same basic functions of doors and windows; however, higher-end series products offer superior performance and a more comfortable experience.
✅ Final Thoughts
Whether you are investing in window replacement or installing new energy-efficient windows, understanding the process and key acceptance points will give you peace of mind. At [Your Brand], we provide not only premium window and glass solutions but also professional installation services-so you can enjoy a safer, quieter, and more comfortable home.
➡Contact us today for a free consultation and discover how the right windows can transform your living space!
