Are UPVC sliding windows completely waterproof and dustproof?

UPVC sliding windows have strong waterproof and dustproof capabilities, but cannot guarantee complete waterproof and dustproof, especially under extreme conditions. UPVC, as a corrosion-resistant and weather resistant material, naturally has the characteristics of waterproof and dustproof. Window frames and sashes are usually equipped with high-quality sealing strips, which can effectively prevent moisture, dust, and sandstorms from entering, thereby improving the waterproof and dustproof performance of windows.

Under normal usage conditions, UPVC sliding windows can effectively prevent rainwater from seeping into the interior and block the entry of most external dust, especially on rainy or windy days. Due to its non hygroscopicity and corrosion resistance, UPVC material exhibits excellent resistance to moisture erosion, unlike wooden windows that are prone to moisture, mold, or decay.

In extreme weather conditions, such as strong rainstorm, strong wind, sandstorm, etc., the sealing and protective ability of sliding windows may be challenged. High quality UPVC sliding windows are equipped with an efficient sealing system, but due to the design of sliding the window sash to achieve opening and closing, there may be small gaps between the sash and the frame, which in extreme cases can lead to the infiltration of moisture and dust.