28 8 月, 2025
The key is temperature control—both for the workshop and the materials. Before any welding takes place, ensure the production area maintains an ambient temperature of at least 15°C. Equally important, UPVC profiles should be stored in this controlled environment for a minimum of 24 hours before processing. This allows the material to stabilize and avoids thermal shock during fabrication.
When it comes to glazing, extra care is needed. It’s highly recommended to perform glass installation in a separate, enclosed space heated to above 20°C. Window sashes that are ready for glazing should also be stored in this warm environment for at least 16 hours. This step reduces temperature differences that could cause stress buildup once the sealant and glass are applied.
In colder regions, consider using welding machines equipped with pre-heating features. Pre-heating the UPVC profile right before welding helps distribute thermal energy more evenly, relieving internal stress at the weld seams and significantly improving joint integrity.
By adopting these measures—temperature-stable storage, warm processing spaces, and pre-heating technology—you can maintain high-quality welds and prevent corner cracking even in the coldest months. A little extra attention to thermal conditions goes a long way in ensuring the longevity and performance of UPVC windows.