div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=materials-guide-2020-11-24-window-frames-made-of-upvc-are-energy-efficienthtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Materials Guide · 2020 11 24 · Window frames made of uPVC are energy efficient and do not require painting However the formula for manufacturing uPVC can vary widely from loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader036vdocumentssitereader036viewer20220715146135fa740ad5d2067647b8f6html5thumbnails1jpg width=140 height=200 divdiv