塑鋼門窗與斷橋鋁門窗它們的特點幾乎一致的：節能、美觀、阻燃、導熱系數差、易清潔。但因為斷橋鋁門窗有獨特的特點使得塑鋼門窗逐漸被替代。斷橋鋁門窗與塑鋼門窗的特點對比：

The characteristics of plastic steel doors and windows and bridge cut aluminum doors and windows are almost the same: energy-saving, beautiful, flame-retardant, poor thermal conductivity, and easy to clean. But due to the unique characteristics of broken bridge aluminum doors and windows, plastic steel doors and windows are gradually being replaced. Comparison of Characteristics between Broken Bridge Aluminum Doors and Windows and Plastic Steel Doors and Windows:

1、氣密性能。塑鋼窗的PVC型材是通過焊接連接的，在連接處沒有縫隙;而斷橋鋁合金窗是通過螺栓連接的，因此塑鋼窗的氣密性要優于斷橋鋁合金窗。

1. Air tightness performance. The PVC profiles of plastic steel windows are connected by welding, with no gaps at the joints; And the broken bridge aluminum alloy window is connected by bolts, so the air tightness of the plastic steel window is better than that of the broken bridge aluminum alloy window.

2、隔聲性能。由于鋁合金的金屬特性，其能量傳播性能遠高于塑鋼窗，其中就包括聲能和熱能，因此塑鋼窗的隔聲性要明顯優于鋁合金窗。

2. Sound insulation performance. Due to the metallic properties of aluminum alloy, its energy propagation performance is much higher than that of plastic steel windows, including sound and heat energy. Therefore, the sound insulation of plastic steel windows is significantly better than that of aluminum alloy windows.

3、抗風壓強度。雖然塑鋼窗內有鋼襯支撐，但鋼襯與鋼襯之間沒連接，因此在強度上沒有斷橋鋁合金高，抗風壓強度相對斷橋鋁合金較低。

3. Wind resistance strength. Although there is steel lining support inside the plastic steel window, there is no connection between the steel linings, so the strength is not as high as that of the broken bridge aluminum alloy, and the wind pressure resistance strength is relatively lower than that of the broken bridge aluminum alloy.

4、保溫性能。PVC型材是目前用于門窗的型材中保溫性能好的，其傳熱系數是鋼材的1/357，是鋁型材的1/1250，鋁型材和PVC型材整窗的傳熱系數之比是1.44倍，即冬季、夏季的能量損失是塑鋼窗的1.44倍。

4. Thermal insulation performance. PVC profiles are currently the profiles used for doors and windows with good insulation performance. Their heat transfer coefficient is 1/357 of steel and 1/1250 of aluminum profiles. The ratio of heat transfer coefficient between aluminum profiles and PVC profiles for the entire window is 1.44 times, which means that the energy loss in winter and summer is 1.44 times that of plastic steel windows.

5、采光性能。由于塑鋼窗的在外立面的投影尺寸比斷橋鋁合金窗大一些，其框扇構件遮光面積比斷橋鋁合金窗大10%左右，因此同樣的洞口尺寸，塑鋼窗的采光性能比斷橋鋁合金窗差10%左右。

5. Lighting performance. Due to the larger projection size of plastic steel windows on the exterior facade compared to broken bridge aluminum alloy windows, the shading area of their frame and fan components is about 10% larger than that of broken bridge aluminum alloy windows. Therefore, with the same opening size, the lighting performance of plastic steel windows is about 10% worse than that of broken bridge aluminum alloy windows.

6、水密性。由于塑鋼窗的開啟扇（內平開）與框不是同一平面，向室內凹陷，因此容易積水（不會進入室內），需要通過排水槽排水，冬季不會結露。而斷橋鋁合金的開啟扇與框在同一平面，不易積水，但由于其金屬特性，在冬季可能出現結露現象。

6. Water tightness. Due to the fact that the opening fan (inner side opening) of the plastic steel window is not on the same plane as the frame, it is prone to water accumulation (not entering the room) and needs to be drained through a drainage channel to prevent condensation in winter. The opening fan and frame of the broken bridge aluminum alloy are on the same plane, which is not easy to accumulate water. However, due to its metallic properties, condensation may occur in winter.