Broken Bridge Aluminum System Doors
Q1: What is "broken bridge" aluminum technology?
A: Broken bridge aluminum inserts a PA66 nylon thermal break strip (or polyurethane foam) between the inner and outer aluminum profiles, "breaking" the metal connection to form a thermal bridge. This structure effectively blocks heat conduction through the metal profile, greatly improving thermal insulation while retaining the high strength and corrosion resistance of aluminum alloy.
Q2: What thermal performance (U-value) can be achieved?
A: Standard configuration (broken bridge profile + insulating glass) achieves a U-value of 2.0-2.8 W/(m²・K). High-end configuration (triple glazing + Low-E + argon filling) achieves 1.0-1.5 W/(m²・K), meeting passive house standards. Exact values vary by configuration and profile series.
Q3: How is the sound insulation performance?
A: Standard insulating glass configuration provides approximately 28-32dB of sound insulation. Laminated insulating glass (e.g., 5+12A+5+0.76PVB+5) can reach 35-40dB, suitable for noisy environments near roads, airports, or railways.
Q4: What glass configurations are available?
A:Options include: single glass, double insulating glass (5+12A+5 / 5+20A+5), triple glazing, Low-E low-emissivity glass, tempered glass, laminated safety glass, decorative glass (frosted/reeded/patterned), and argon/krypton gas filling. Combinations can be customized.
Q5: What opening methods are available?
A: Available options include outward casement, inward casement, tilt & turn, sliding, lift-sliding, and folding. We can recommend the most suitable solution based on usage scenario and space requirements.
Q6:What hardware brands do you use?
A: Standard configuration uses high-quality domestic hardware (Kinlong, Guoqiang, etc.). Imported German brands (Roto, G-U, Siegenia) and HOPO are available as options. Hardware warranty ranges from 2-5 years depending on the brand.
Q7: What is the profile wall thickness and series specification?
A:Door profiles mainly include 70, 80, 90, 108, and 120 series, with wall thickness from 1.4mm to 2.0mm (thicker options available). Surface treatments include anodizing, powder coating, fluorocarbon coating, and wood grain transfer.
Q8:How is the waterproof and sealing performance?
A: Featuring multi-layer sealing (2-3 EPDM rubber seals), an isobaric drainage chamber, and hidden drainage holes, water tightness reaches Grade 6 (GB/T 7106), air tightness Grade 8, and wind pressure resistance Grade 9. Suitable for typhoon and heavy rain prone areas.
Q9: What is the MOQ and pricing?
A: Priced per square meter, MOQ is 10 square meters (approximately 2-3 door sets). Prices range from $120-$350 per square meter (FOB Tangshan), depending on profile series, glass configuration, hardware brand, and opening method. A detailed quote requires size and configuration specifications.
Q10: What is the lead time and how about installation?
A: Standard configuration: 15-25 working days. Special configuration (imported hardware/special glass): 25-40 working days. Chinese-English installation manuals and video guidance are provided. System doors are shipped pre-assembled (hardware pre-adjusted), making on-site installation straightforward.
