The Insulated Aluminum Window Frame is a complete, ready-to-fabricate system that combines high-strength 6063-T5 aluminum profiles, PA66 GF25 thermal break strips, and pre-engineered EPDM gaskets into a single coordinated package. Unlike buying individual profiles and seals from multiple sources, our frame system ensures that the outer frame, sash, glazing beads, gaskets, and thermal breaks are all designed to work together perfectly. This integration removes the guesswork from window fabrication and guarantees the thermal, acoustic, and weather-tightness performance that project specifications demand.
At the heart of the frame's insulation performance is a wide PA66 polyamide strip — available in widths from 14.8mm up to 34mm — that physically separates the interior and exterior aluminum sections. This “broken bridge” design cuts heat flow through the metal by over 500 times compared to a solid aluminum frame, achieving frame U-values (Uf) as low as 1.8 W/m²K. Multi-chamber hollow profiles further improve thermal resistance by trapping still air within the frame, while the triple EPDM gasket system (inner, centre, and outer) ensures excellent air and water tightness.
Shengxin extrudes the aluminum profiles, performs the thermal break assembly, and applies the surface finish — anodized, powder coated, or PVDF — all within our vertically integrated factory. The result is an insulated aluminum window frame that arrives at your workshop pre-assembled and dimensionally checked, ready for cutting, machining, and glazing. With 35 extrusion lines, 3 anodizing lines, 3 powder coating lines, and 29 years of manufacturing history, Shengxin supplies window fabricators across 97 countries with full documentation and technical support.
Features & Benefits
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Complete, integrated frame system: Outer frame, sash, glazing beads, thermal breaks, and three EPDM gaskets are supplied as one matched kit — no sourcing from different suppliers, no compatibility issues.
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PA66 thermal break from 14.8mm to 34mm: Choose the strip width to match your target Uf value. Every strip is mechanically crimped and tested to EN 14024 for shear strength, ensuring long-term structural integrity.
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Multi-chamber profile design: Internal hollow chambers within the aluminum extrusions reduce convection and radiation across the frame, adding to the thermal performance achieved by the PA66 strip alone.
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Triple EPDM gasket system pre-inserted: Inner, centre, and outer gaskets are factory-fitted — providing a continuous seal against air, water, and noise. The system is tested to EN 1026 for air permeability and EN 1027 for water tightness.
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Standard Euro-groove hardware slots: 15mm and 20mm slots accept all major European locking mechanisms, hinges, and tilt-turn corner drives — no custom adaptors required.
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Double and triple glazing ready: The frame system accommodates insulated glass units from 24mm to 44mm, covering standard double glazing and high-performance triple glazing for Passive House projects.
Insulated Window Frame Performance Guide
Select the frame depth and thermal break width that matches your project's energy requirements. All data based on standard 1.23m x 1.48m reference windows with warm-edge spacers.
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Frame Depth
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PA66 Strip Width
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Frame Uf (Typical)
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Whole-Window Uw (with Ug 1.1 Glass)
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Noise Reduction (Rw)
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Best Application
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60 mm
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14.8 – 18.6 mm
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2.8 – 3.2 W/m²K
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1.6 – 2.0 W/m²K
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32 – 35 dB
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Moderate climates; renovation; value projects
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70 mm
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20.0 – 24.0 mm
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2.2 – 2.6 W/m²K
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1.3 – 1.6 W/m²K
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35 – 38 dB
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Cold climates; new-build residential
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80 mm
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28.0 – 34.0 mm
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1.8 – 2.2 W/m²K
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0.8 – 1.2 W/m²K
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38 – 42 dB
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Passive House; net-zero; alpine regions
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All U-values are indicative and confirmed per project via EN ISO 10077-2 thermal simulation. Acoustic ratings vary with glazing specification and installation quality.
Technical Specifications
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Product
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Insulated Aluminum Window Frame System
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Aluminum Alloy
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6063-T5 (outer frame, sash, glazing bead); 6061-T6 (reinforcement profiles)
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Thermal Barrier Material
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PA66 GF25; thermal conductivity 0.30 W/m·K
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Gasket Material
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EPDM (ethylene propylene diene monomer); UV and ozone resistant
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Available Frame Depths
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60 mm / 70 mm / 80 mm (custom depths on request)
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Glass Thickness Range
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24 mm – 44 mm IGU (double or triple glazing)
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Hardware Compatibility
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Euro-groove 15 mm / 20 mm; compatible with all major European hardware brands
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Air Permeability Class
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Class 4 per EN 12207 (highest classification)
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Water Tightness Class
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Class E900 per EN 12208 (up to 900 Pa without leakage)
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Compliance Standards
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EN 14351-1, EN 14024, EN 755, EN 12207, EN 12208, Qualanod, AAMA, GB 5237
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Applications
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New-build energy-efficient homes: The 70mm frame system meets or exceeds current building energy codes, providing excellent thermal insulation for houses, townhouses, and low-rise apartment buildings in cold and temperate climates.
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Passive House certified projects: The 80mm system with 34mm PA66 strips and triple glazing capability enables whole-window Uw values below 0.8 W/m²K, meeting Passive House Institute requirements for window thermal performance.
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Renovation and window replacement: When upgrading from old, leaky windows, our insulated aluminum frames provide a modern, high-performance alternative that fits standard openings while dramatically improving comfort and reducing energy bills.
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Urban apartments and noise-sensitive locations: The multi-chamber profile design combined with acoustic laminated glass achieves sound reduction of up to 42 dB — ideal for apartments near busy roads, railway lines, or airports.
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Coastal and harsh-environment buildings: 6063-T5 aluminum with PVDF or anodized finish resists salt-laden air and high humidity, while the EPDM gaskets remain flexible and effective for decades without cracking.
Fabrication & Supply Options
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Service
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Description
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Frame Kit Supply
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Complete outer frame + sash + glazing beads + thermal breaks + gaskets in one package
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Cut-to-Length
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Precision cut profiles to your window schedule dimensions; ±0.5 mm accuracy
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CNC Machining
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Drainage slots, hardware holes, locking cut-outs per fabrication drawing
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Surface Finishing
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In-house anodizing (3 lines), powder coating (3 lines), PVDF, wood grain
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Gasket Pre-Insertion
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EPDM bubble and fin gaskets factory-fitted in all three seal positions
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Accessories
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Corner cleats, drainage covers, reinforcement profiles, glazing setting blocks
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Why Shengxin for Insulated Window Frames?
A window frame is only as reliable as its weakest component. By manufacturing the aluminum profiles, performing the thermal break assembly, and even pre-inserting the gaskets within our own factory, Shengxin eliminates the quality gaps that occur when multiple subcontractors are involved. Window fabricators receive a coordinated, dimensionally verified system ready for the production line.
35 Extrusion Lines
From 600-ton to 5,500-ton presses, we can extrude every frame component — outer frame, sash, and glazing bead — with the same alloy batch for colour and quality consistency.
Automated Thermal Break Assembly
Computer-monitored roll-forming ensures consistent PA66 strip crimping. Every assembled frame section is checked for interlock depth and shear strength per EN 14024.
In-House Gasket Insertion
We pre-fit EPDM gaskets into the inner, centre, and outer seal grooves — saving you labour and ensuring correct gasket orientation for optimal weather performance.
Complete Documentation
Every frame order comes with EN 14351-1 performance data, aluminum mill certs, PA66 material certs, and surface finish compliance reports — supporting your CE marking and customer approvals.
Global Supply, Local Support: $120 million in assets; 100,000-ton annual capacity; 5,000-ton warehouse with 5 container loading platforms. We export insulated window frames to 97 countries, with technical support available for U-value calculations, profile selection, and fabrication guidance.
Insulated Aluminum Window Frame FAQ
Q: Does the frame come with gaskets and thermal breaks already installed?
A: Yes. We can supply the frame with PA66 thermal strips crimped and EPDM gaskets pre-inserted. This saves significant workshop labour and ensures the gaskets are correctly seated. You simply cut the profiles to length, machine the hardware holes, and assemble the window.
Q: Can I use the same frame system for fixed and opening windows?
A: Absolutely. The outer frame profile is common to both fixed lights and opening sashes. For fixed windows, you use the outer frame with a glazing bead directly. For opening windows, you add the corresponding sash profile. This commonality simplifies stock holding and workshop setup.
Q: What hardware brands are compatible with your insulated frames?
A: Our frames feature standard Euro-groove 15mm/20mm slots, compatible with Roto, Siegenia, GU, Winkhaus, Maco, and others. No custom hardware adaptors are needed. We can also machine the hardware preparation in our factory if you provide the specification.
Q: How do I ensure the frame meets the required U-value for my project?
A: Tell us your target whole-window Uw value and the glazing specification you intend to use. Our engineering team will run an EN ISO 10077-2 thermal simulation and recommend the appropriate frame depth and PA66 strip width. We provide the Uf calculation and the simulated Uw value for your documentation.
Q: Is there a minimum order quantity for complete frame systems?
A: For standard 60mm, 70mm, or 80mm frame series from our existing die library, we can supply trial quantities for prototyping and testing. Production orders typically start at 500 kg per profile type. Contact our sales team with your project details for a specific quotation.
Custom Insulated Window Frame Solutions
Need a custom frame depth? A non-standard PA66 strip width? A specific gasket geometry for a unique window design? Shengxin's custom extrusion and frame system development service engineers insulated aluminum window frames to your exact design brief — from profile concept to certified production.
How It Works:
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Send your drawing — 2D PDF/DWG or 3D STEP/IGES file of your frame design.
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Our engineers review — we assess extrudability, thermal break placement, gasket interfaces, and suggest performance optimisations.
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Receive a quotation — covering die development, PA66 strip specification, unit pricing, and lead time.
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Approve a sample — we extrude the profiles, assemble the thermal break, insert the gaskets, apply the finish, and ship sample frame sections.
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Full production — consistent quality with full documentation, delivered to your fabrication facility on schedule.
⚠️ Important Note: All frame images and dimensional drawings on this page are for reference only. Each insulated window frame system is custom-engineered — final dimensions, PA66 strip width, gasket type, Uf value, and surface finish will be confirmed based on your approved production drawings and thermal simulations. Please contact our engineering team to discuss your specific project requirements before placing an order.
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| See also: Thermal Break Aluminum Profile, Thermally Broken Window Profile, Aluminum Thermal Break Profile for Windows
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