| Aluminum Alloy | Commonly EN AW-6060 or EN AW-6063 aluminum alloy; T5 or T6 temper. | EN AW-6063-T5/T6 or equivalent architectural extrusion alloy with controlled mechanical properties. | Request alloy and temper certificates; prioritize EN 755 and EN 12020-compliant extrusion tolerances. | Verified alloy consistency supports structural strength, surface quality, machining accuracy, and long-term durability. |
| Thermal Break Design | None; aluminum frame creates a continuous thermal bridge. | Polyamide thermal barrier, typically 24–34 mm wide, mechanically locked into the aluminum profile. | Use a thermal-break design for heated or cooled buildings; verify thermal-barrier width and pull-out strength. | Thermal breaks reduce heat transfer, interior condensation risk, and energy loss through the frame. |
| Frame Thermal Transmittance (Uf) | Typically about 2.0–3.5 W/m²K, depending on section geometry. | Typically about 1.0–1.8 W/m²K; advanced systems may achieve lower values with optimized geometry. | Target Uf ≤ 1.8 W/m²K for demanding energy-efficiency projects. | Lower Uf improves whole-door U-value and helps projects meet regional energy codes. |
| Glazing Compatibility | Often supports approximately 6–24 mm glass or insulated glazing units. | Commonly supports approximately 28–52 mm insulated glazing units, depending on the glazing bead and sash. | Select a profile that accepts the specified low-emissivity double or triple glazing package. | Glazing compatibility affects thermal performance, acoustic insulation, solar control, and safety compliance. |
| Thermal Barrier Material | Not applicable. | Usually glass-fiber-reinforced polyamide, commonly PA66 with approximately 25% glass fiber. | Verify material declaration, dimensional stability, moisture resistance, and compatibility with the extrusion system. | The thermal barrier must remain stable under temperature changes and long-term mechanical loading. |
| Air Tightness | Typical tested performance ranges from Class 2 to Class 3 under EN 12207, depending on seals and fabrication. | Well-designed systems can achieve Class 3 or Class 4 under EN 12207 when correctly fabricated and installed. | Target EN 12207 Class 3 or Class 4 for exterior residential and commercial applications. | Improved air tightness reduces drafts, dust ingress, energy loss, and noise transmission. |
| Watertightness | Typical project results may range from 150–450 Pa, depending on drainage and test configuration. | Well-designed systems commonly target approximately 300–900 Pa or higher, subject to tested configuration. | Choose a tested classification suitable for the building exposure; verify EN 12208 test results. | Watertightness is critical in coastal, high-rainfall, typhoon, and high-rise environments. |
| Wind Load Resistance | Often suitable for moderate exposure when profile depth, wall thickness, and sash size are properly designed. | Typical tested design pressures may range from approximately 1200–2000 Pa, with higher values possible in reinforced configurations. | Specify design wind pressure using EN 12210, ASTM E330, or the applicable local standard. | Wind resistance depends on profile inertia, sash dimensions, glass weight, anchors, and installation conditions. |
| Profile Wall Thickness | Commonly approximately 1.4–2.0 mm for non-thermal-break architectural sections. | Commonly approximately 1.6–2.5 mm in structural areas, with locally reinforced sections where required. | Confirm minimum wall thickness based on span, panel weight, wind pressure, and allowable deflection. | Wall thickness alone does not determine performance; section geometry and structural calculations are also essential. |
| Sash and Panel Weight Capacity | Often designed for approximately 80–150 kg per sliding panel, depending on rollers and system size. | Heavy-duty configurations may support approximately 150–300 kg per panel when matched with suitable rollers and reinforced profiles. | Confirm tested hardware capacity, safety factor, panel dimensions, and glass weight before ordering. | Correct capacity prevents difficult operation, premature roller wear, sash sagging, and safety problems. |
| Sliding Operation | Standard stainless-steel or polymer rollers with conventional track arrangements. | Low-friction tandem rollers, adjustable carriages, corrosion-resistant tracks, and optional lift-and-slide mechanisms. | Prefer adjustable rollers with replaceable wheels and documented cycle testing. | Reliable hardware improves operating force, service life, accessibility, and maintenance efficiency. |
| Opening Configuration | Two-panel or three-panel sliding layouts are common. | Two-, three-, four-, multi-track, pocket, corner-opening, and lift-and-slide configurations may be available. | Select the configuration according to clear opening, ventilation, structural span, and drainage requirements. | The profile must support the required opening size without compromising weather or structural performance. |
| Acoustic Performance | Approximately 25–32 dB reduction with suitable insulated glass and seals. | Approximately 32–45 dB may be achievable with optimized seals, laminated glass, and asymmetrical insulated glazing. | Request tested Rw or STC data for the complete door assembly, not the profile alone. | Noise insulation is determined by the complete frame, glass, gaskets, interlocks, and installation quality. |
| Surface Finish | Anodized or powder-coated finish; typical anodized coating thickness is approximately 10–15 μm. | Architectural powder coating commonly approximately 60–120 μm, or anodizing commonly approximately 15–20 μm, depending on specification. | Specify coating thickness, color tolerance, pretreatment, UV resistance, and applicable quality standard. | Correct surface treatment protects the aluminum against weathering, corrosion, abrasion, and color fading. |
| Corrosion Resistance | Suitable for normal inland environments when drainage and coating are correctly designed. | Enhanced pretreatment, durable coating, stainless-steel hardware, and isolated dissimilar metals for coastal or humid areas. | Request neutral salt-spray or project-specific corrosion test data under ISO 9227 where exposure is severe. | Coastal salt, industrial pollutants, and high humidity can accelerate corrosion at cuts, joints, fasteners, and tracks. |
| Drainage System | Basic concealed or visible drainage holes and sill channels. | Multi-level drainage channels, pressure-equalized chambers, end dams, and improved sill management. | Verify drainage capacity, weep-hole layout, sill slope, and compatibility with the installation substrate. | Effective drainage prevents water accumulation, leakage, staining, corrosion, and damage to adjacent finishes. |
| Gasket and Seal System | EPDM or compatible elastomer seals with basic interlock protection. | Multi-point EPDM sealing, brush seals, compression gaskets, and reinforced interlock seals. | Use UV-resistant, ozone-resistant seals with replaceable profiles and documented temperature performance. | Seal quality strongly affects air, water, acoustic, thermal, and operating performance throughout service life. |
| Safety Features | Basic anti-lift blocks, standard locks, and safety glazing options. | Anti-lift protection, multi-point locking, laminated or tempered safety glass, restrictors, and child-safety options. | Specify safety glazing and anti-lift requirements according to the destination market and building type. | Safety requirements vary by country, building height, occupancy, and proximity to walkways or floor edges. |
| Durability Testing | Basic operational testing may be available depending on the system supplier. | Prefer complete-door testing to EN 1191 or an equivalent local standard, with documented opening-cycle results. | Request cycle-test data for the actual panel weight, hardware set, and opening dimensions. | Complete-assembly testing provides more useful evidence than isolated profile laboratory data. |
| Manufacturing Tolerance | Performance can vary significantly with cutting, crimping, corner assembly, and drainage accuracy. | Requires controlled CNC processing, accurate thermal-bar insertion, calibrated crimping, and documented quality inspection. | Require shop drawings, cutting lists, fabrication tolerances, inspection records, and sample approval. | Precise fabrication is essential for smooth sliding, reliable seals, consistent sightlines, and repeatable project quality. |
| Sustainability and Recyclability | Aluminum is recyclable, but recycled content and material traceability may not be documented. | Can incorporate certified recycled aluminum, optimized extrusion design, and disassembly-friendly components. | Request recycled-content declarations, environmental product information, and material separation guidance. | Documented material content supports green-building assessments, environmental reporting, and circularity goals. |
| Best Overall 2026 Selection | Appropriate for mild climates, interior applications, garages, or projects with limited energy requirements. | Recommended for exterior residential, hospitality, office, coastal, high-rise, and energy-conscious projects. | Prioritize a thermally broken, test-certified system with Uf ≤ 1.8 W/m²K, EN 12207 Class 3–4 air tightness, verified water and wind performance, and serviceable hardware. | The best profile is the one whose complete tested assembly matches the climate, building code, opening size, glazing, and lifecycle requirements. |
