Windows and doors are essential components of a building, and their quality directly affects the safety and comfort of the home. When selecting windows and doors, it is crucial to carefully inspect their quality to ensure that the products meet the required standards. Here are the checks to perform for window and door quality:
1. Appearance Check
The first step in selecting windows and doors is to conduct an appearance check. Inspect the surface for smoothness and look for cracks, deformities, or peeling paint. Additionally, check the corners of the windows and doors to ensure they are neat and free from obvious defects or damage. The appearance check helps us gain an initial understanding of the quality of the windows and doors.

2. Material Check
The quality of the materials used in windows and doors directly determines their lifespan and stability. When inspecting windows and doors, observe the types of materials used, such as wood, aluminum alloy, or PVC. It is essential to choose windows and doors made from high-quality raw materials to ensure durability. Moreover, check the quality of the hardware components, such as locks and hinges, to ensure they meet the required standards.
3. Safety Check
Safety is a crucial aspect when it comes to windows and doors. When selecting, check for any anti-theft features, and ensure they are designed according to safety standards. The glass should be tempered or laminated glass to enhance its impact resistance. Additionally, verify that the opening mechanism operates smoothly and complies with fire escape requirements.

4. Thermal Performance Check
Thermal performance is one of the key indicators for evaluating windows and doors. When choosing them, learn about their thermal insulation coefficient and airtightness. It is advisable to select windows and doors with good thermal insulation properties to enhance the energy efficiency and comfort of the home. Additionally, check the sealing performance to ensure effective prevention of wind and rain intrusion.

5. Soundproofing Performance Check
With the rapid urbanization, noise pollution has become a significant issue in people's lives. When selecting windows and doors, check their soundproofing performance. Opt for products that provide excellent noise reduction to improve the comfort of the living environment.
6. Opening Mechanism and Design Check
It is also important to consider the opening mechanism and design of the windows and doors. Choose an opening style that suits your needs, such as sliding windows or casement windows. Additionally, pay attention to whether the design aligns with the overall aesthetic of your décor and whether it looks attractive.

In summary, the quality checks for windows and doors include appearance, materials, safety, thermal performance, soundproofing performance, opening mechanism and design, brand, and after-sales service. When selecting windows and doors, consider all these factors comprehensively to ensure you choose quality products that enhance the safety and comfort of your home.