Another key effect of high quality manufacturing around the longevity of uPVC doors could be the power to withstand warping. Warping is a very common issue for uPVC doors which may have not been produced with higher-good quality materials. Sub-standard uPVC doors are prone to warping after a while on account of different versions in temperature or dampness, which can cause them to lose their shape and become hard to close or locking mechanism securely.