Specific tips for the selection of UPVC doors and windows:

Check the quality of the profile: the surface of high quality UPVC profiles should be smooth and uniform in color, usually blue or ivory white, without obvious scratches, depressions or bubbles.Avoid selecting profiles with too bright colors or obvious impurities. Inspect the hardware of doors and windows: Hardware is an important part of doors and windows. It should be of good quality and flexible in operation.Ensure that the hardware matches the profile and there is no loosening or falling off. Pay attention to the quality of the glass: The glass of UPVC doors and windows should be smooth, bubble-free and undulated.At the same time, pay attention to the thickness and safety of the glass. Choose single or double-layer insulating glass according to your needs to enhance the sound insulation and heat preservation effect. Consider the sealing performance: Good UPVC doors and windows should have good sealing performance, which can effectively prevent wind and rain from entering.Check whether the sealing strip of doors and windows is complete, fitted, and not falling off or damaged. Consider the thermal insulation performance: High quality UPVC doors and windows should have good thermal insulation performance, which can effectively maintain indoor temperature.You can ask the sales staff about the heat transfer coefficient (U value) and shading coefficient (SC) of doors and windows to understand the thermal insulation performance of doors and windows. Understand the after-sales service: Choose brands and manufacturers with good after-sales service, so that problems encountered in the process of use can be solved in time. Comparing price and performance: Different brands and manufacturers of UPVC doors and windows have different prices and performance.When choosing and purchasing, appropriate brands and products should be selected according to their own needs and budgets. In a word, when choosing and purchasing UPVC doors and windows, factors such as profile quality, hardware, glass quality, sealing performance, heat insulation performance and after-sales service should be considered comprehensively in order to select UPVC doors and windows with excellent performance and reasonable price.