Aluminium Casement Windows | Thermal Break, Customizable | SGL
Shaanxi SGL Doors&Windows Technology Co., Ltd. is one of the most reliable manufacturers and suppliers of aluminium casement windows | thermal break, customizable | sgl in China, also supports customized service. Please feel free to wholesale high quality aluminium casement windows | thermal break, customizable | sgl for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Product Description
What Are Aluminium Casement Windows?
An aluminium casement window (also called aluminum casement window in the US market) is a window with a frame and sash hinged at the side, opening inward or outward. Unlike sliding windows where only half the opening is usable, casement windows offer 100% ventilation when fully opened. When closed, the sash presses against the frame using compression seals - not slides past it - creating a much tighter seal.
This makes casement windows the preferred choice for architects and contractors who prioritize airtightness, energy efficiency, and natural ventilation. Combined with a PA66 polyamide thermal break, these windows cut heat transfer through the frame by up to 50% compared to non-thermal-break aluminum sections.
Why Choose SGL Aluminium Casement Windows?
SGL Doors & Windows brings over 19 years of aluminium window and door manufacturing expertise. Based in Shaanxi, China, we operate a 9,000 m² production base with four manufacturing plants and 200+ skilled employees. Our casement windows are trusted by architects, builders, and distributors across the UK, USA, Australia, Europe, Africa, Central Asia, and Southeast Asia.
We combine factory-direct pricing with full customization - from frame thickness and glass configuration to RAL color matching and hardware specifications. Every window is built to your project's specific requirements, with CE and ISO 9001 certifications backing every shipment.
Key Features
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PA66 Thermal Break - Energy Savings
- PA66 nylon strip reinforced with 25% glass fiber reduces heat conduction between inner and outer frames. Achieves U-value of 1.4–1.8 W/m²K. Reduces annual HVAC energy consumption by an estimated 30-40%.
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Multi-Point Locking Security
- Equipped with Roto (Germany), GU (Germany), or Fapim (Italy) multi-point locking systems. Locking points at 3-5 positions along the sash perimeter ensure uniform compression of seals for both security and airtightness.
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Triple-Layer EPDM Sealing
- Three continuous EPDM sealing strips retain elasticity from −40 °C to +120 °C. This achieves Class A water tightness (EN 12208) - tested to withstand 600 Pa water pressure without leakage.
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Full Customization
- Profiles: 1.4mm to 3.0mm | Glass: Double or triple, Low-E, laminated, argon-filled | Color: Any RAL code, anodized, wood grain | Hardware: Concealed hinges, restrictor stays, key-lock options | Screen: Integrated roller or fixed 304 SS mesh
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Sound Insulation - 35 to 45 dB
- Multi-chamber profiles + double/triple glazing + argon filling achieve 35-45 dB sound reduction. Laminated PVB inner panes available for noise-sensitive projects (hotels, hospitals, schools).
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Factory-Direct Pricing
- Three-stage quality inspection (AQL 2.5 standard). Packaging includes EPE foam + corner protectors + wood crate for sea freight. Full documentation: packing list, invoice, certificate of origin, test reports. Online technical support included.
Suitable For
Aluminium casement windows are versatile across multiple project types:
- Residential Houses
- Apartments & Condominiums
- Villas & Luxury
- HomesHotels & Resorts
- Commercial Buildings
- Schools & Hospitals
- Renovation Projects
our aluminum window Application
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Frequently Asked Questions
Q: Q1: How energy-efficient are thermal break aluminium casement windows?
A: Thermal break windows reduce heat transfer by up to 50% compared to non-thermal-break aluminum. With PA66 thermal break and double Low-E argon-filled glazing, they achieve a U-value of 1.6–1.8 W/m²K, meeting building energy codes in most jurisdictions. See NFRC energy performance standards →
Q: Q2: Can I get custom sizes and colors?
A: Yes. Fully customizable from 300mm to 2,400mm per dimension. Available in all RAL colors, anodized silver, and wood grain finishes. Custom shapes (arched, triangular) also available.
Q: Q3: What is the lead time for bulk orders?
A: 50-500 m²: 20-25 days production. 500-2,000 m²: 25-35 days. 2,000-5,000 m²: 35-45 days. Sea freight: 15-35 days depending on destination. Express production available.
Q: Q4: Are SGL casement windows compliant with UK and EU building regulations?
A: Yes. CE marked (EN 14351-1) covering wind load, air permeability, water tightness, and thermal transmittance. UKCA documentation also available for projects in Great Britain.
Q: Q5: What is the warranty coverage?
A: Aluminium frame & coating: 10 years. Hardware & glass: 5 years. EPDM seals: 3 years. Defective parts replaced free of charge (EXW SGL factory).
Q: Q6: How do aluminum casement windows compare to uPVC?
A: Aluminium offers superior strength, longer lifespan (40+ years vs 20-25 for uPVC), thinner profiles for more glass area, and full recyclability. While uPVC may have a lower initial cost, aluminium provides better long-term value - especially for larger openings and commercial projects.
Project Case Studies
We provide one-stop door and window solutions for individual buyers, contractors, renovation companies, and more.
Our address
No. 2 Group, Fumiao Village, Laojun Town, Hantai District, Hanzhong City, Shaanxi Province, China
Phone Number
+86 13335450021
sgl-factory@sgl-doors-windows.com
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Technical Specifications
| Specification | Details |
|---|---|
| Material | Aluminium Alloy 6063-T5 |
| Opening Type | Inward / Outward / Side Hung |
| Frame Thickness | 1.4mm / 1.6mm / 2.0mm / 3.0mm |
| Glass Options | Double / Triple Glazing, Low-E, Laminated, Argon-filled |
| Hardware | German (Roto/GU) / Italian (Fapim) multi-point locking |
| Surface Finish | Powder Coating / Anodizing / Wood Grain |
| Thermal Break | PA66 Polyamide + 25% Glass Fiber |
| Air Permeability | Class A (EN 12207) |
| Water Tightness | Class A (EN 12208) - 600 Pa tested |
| Sound Insulation | 35 – 45 dB |
| Size Range | 300mm × 300mm to 2,400mm × 2,400mm (custom) |
| Insect Screen | Available - roller or fixed (304 SS mesh) |
| Colors | All RAL colors, Anodized Silver, Wood Grain |
| Certifications | CE (EN 14351-1), ISO 9001:2015, UKCA-ready |
| Warranty | 10-year frame & coating / 5-year hardware & glass |
| MOQ | 50 m² (sample order accepted) |
- PA66 thermal break - reduces heat transfer by up to 50%, U-value from 1.4 W/m²K
- Class A airtight/water tight (EN 12207/12208) - tested to 600 Pa water pressure
- Sound insulation - 35-45 dB with double/triple glazing and argon filling
- Full customization - any size (300-2400mm), all RAL colors, 1.4-3.0mm profiles
- CE & ISO 9001 - compliant with UK (UKCA), EU, and Australian (AS2047) standards
- 10-year warranty - frame structural integrity and powder coating
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