There is little difference between casement window and sliding window at the same price, casement window is slightly higher than sliding window. The price of ordinary flat opening aluminium windows is 200~350 yuan/m2, the price of mid-range window is 450~600 yuan/m2, and the price of high-grade casement window is generally above 800 yuan/m2. Ordinary sliding window are generally 150~300 yuan/m2, mid-range aluminium alloy sliding window is 350~500 yuan/m2, and high-grade sliding window is above 600 yuan/m2. Casement window advantages are large opening area, good ventilation, good sealing, excellent sound insulation, heat preservation and impermeability. The open window is convenient to clean; The open window does not occupy space when it is opened. The disadvantage is that the window width is small and the vision is not wide. The opening of outwards opening window takes up a piece of space outside the wall, which is easily damaged when the wind blows; While the opening of in-swinging casement window takes up part of the indoor space, it is not convenient to use car window shade, and it is also inconvenient to use car window shade and curtains when opening the window, if the quality is not good, it may rain. About sliding window points, push and pull up and down. Sliding window has the advantages of not occupying indoor space, beautiful appearance, economical price and good sealing performance. High-grade slide rail is adopted, and it can be opened flexibly with a gentle push. With large pieces of glass, it not only increases indoor lighting, but also improves the overall appearance of the building. The stress state of Casement is good and not easy to be damaged, but the ventilation area is limited to some extent.
