Sill and Sliding Door Sliding with UPVC material is designed solid and has no pores. So the UPVC sliding door is very safe from the threat of porous, although exposed to heat and rain. Not only that, the cavity of the cavity on the sliding door of UPVC can also absorb the noise coming from outside, this makes the room using the sliding door UPVC will be much quieter. We provide UPVC Sliding Frame and Slide Door with various models and sizes with affordable price.