In terms of coating methods, thermally broken aluminum windows and doors offer a variety of surface treatment technologies, including powder coating, anodizing, electrophoretic coating, and wood grain transfer printing. They offer a wide range of color choices, including white, green, and various finishes such as wood grain and granite.
Regarding color, the limited color options for plastic windows and doors, being only white, are a significant drawback and cannot meet the diverse needs of various building exterior decorations. According to available information, antistatic fire protection for plastics can be achieved by applying an antistatic oil containing quaternary ammonium salts to the surface, which can absorb moisture from the air and increase conductivity.
In terms of fire resistance, flame-retardant PVC plastic windows and doors offer better fire resistance than combustible wooden windows and doors, but are inferior to non-combustible thermally broken aluminum windows and doors.
Thermal Insulation Comparison: The thermal insulation performance of thermally broken aluminum alloy windows is inferior to that of PVC windows. Furthermore, the frame and sash of aluminum alloy windows occupy approximately 10% less of the total window area compared to PVC windows. Additionally, aluminum window frame and sash profiles are not solid, and the wall thickness (actual thermal bridge) of hollow aluminum profiles is approximately 40% thinner than that of PVC profiles.
PVC windows, due to their lower material strength and rigidity, have significantly lower wind pressure resistance and water tightness compared to thermally broken aluminum windows. Because the frame and sash components of PVC windows are welded, their air tightness should be slightly better than that of screw-connected thermally broken aluminum windows. However, aluminum alloy window profiles have higher dimensional accuracy, resulting in a tighter fit between the frame and sash.
PVC windows have poorer lighting performance than thermally broken aluminum windows. Their frame and sash components have approximately 10% larger light-blocking area than aluminum alloy windows, resulting in poorer visibility and decorative effect, and are not conducive to energy conservation and emission reduction in building lighting. Regarding the fire resistance of doors and windows: steel and aluminum doors and windows are relatively better, while plastic and wooden doors and windows are relatively worse. Furthermore, because the steel reinforcement in PVC doors and windows is not connected into a complete frame system at the corners of the profile, the plastic welded corners of the window frame, sash, and T-junctions have relatively low strength. The gap sealing level of thermally broken aluminum doors and windows is basically the same as that of PVC doors and windows, and their sound insulation performance is also basically the same.
