Sliding uPVC windows in Bangalore. Dhanush Buildings Systems sliding uPVC window collection is designed to offer builders and customers alike the greatest amount of flexibility. Based on a wide range of segments, it provides complete versatility by allowing for both single and multiple sliding openers, clip-on or integrated fly screens, and a variety of section sizes to fit both tiny and big openings. In the quickly expanding construction business, it offers the right choice of solutions to fit any window replacement plan or building type.