When choosing doors and windows for your home or commercial property, two popular options often come up: aluminum alloy windows and thermal break (broken bridge) aluminum windows. While they may appear similar on the surface, their construction, performance, and cost differ significantly. This guide explains the key differences to help you make an informed decision.
What Are Aluminum Alloy Doors and Windows?
Aluminum alloy windows and doors are crafted from lightweight, corrosion-resistant aluminum. These frames often undergo surface treatments like anodizing or powder coating to enhance durability and aesthetics.
Key Characteristics:
No thermal insulation layer inside the frame
Fast heat conduction due to metal properties
Insulation performance relies heavily on the glass and sealing strips
Aluminum alloy windows are cost-effective and suitable for moderate climates or buildings with limited insulation needs.
What Are Thermal Break Aluminum Doors and Windows?
Also known as broken bridge aluminum windows, these are designed with a thermal barrier between the inner and outer aluminum frames—usually made of high-strength nylon or polyurethane. This creates an insulating bridge that significantly reduces heat transfer.
Key Advantages:
Excellent thermal insulation and energy efficiency
Enhanced soundproofing capabilities
High structural strength with thicker profiles
Ideal for cold climates or high-rise buildings
Performance Comparison Table
| Feature | Aluminum Alloy Windows | Thermal Break Windows |
|---|---|---|
| Thermal Conductivity | 160–200 W/m·K | 2–3 W/m·K |
| Energy Efficiency | Basic | Reduces energy loss by 15–20% |
| Sound Insulation | 25–30 dB | 35–45 dB |
| Airtightness | Grade 3–4 | Grade 5–6 |
| Profile Wall Thickness | 1.2–2.0 mm | 2.0–3.0 mm |
| Wind Resistance | Moderate | Excellent |
| Price Range | ¥400–600/m² | ¥600–900/m² |
How to Choose the Right Type
1. Climate and Usage
Cold or variable climates: Choose thermal break windows for better heat retention.
Mild or cost-sensitive projects: Aluminum alloy windows are more affordable and still durable.
2. Noise & Sealing
Urban or roadside environments: Thermal break aluminum + triple-pane glass is ideal.
General residential use: Double-glazed aluminum alloy may suffice.
3. Energy Cost vs. Long-Term Savings
Though thermal break systems cost 20% to 40% more initially, they cut down heating/cooling expenses, paying off in 3–5 years.
4. Brand & Certification
Choose ISO9001 and CE-certified brands
Look for premium surface treatments (e.g., fluorocarbon coating)
5. Installation & After-Sales
Professional installation ensures proper sealing and energy savings. Choose suppliers with documented warranties and service guarantees.
FAQs
Q1: Are thermal break windows worth the extra cost?
A: Yes. Though more expensive, they significantly improve insulation, comfort, and energy efficiency.
Q2: Can I improve my aluminum alloy window’s insulation?
A: Yes. Use multi-pane insulated glass and high-quality seals.
Q3: Where are thermal break windows most beneficial?
A: High-rise apartments, hospitals, villas, schools, and offices needing low energy use and noise reduction.
Q4: What is the lifespan of each type?
A: Both types can last 20+ years with proper maintenance. However, thermal break types offer better performance over time.