image
w7 class="left" url="
https://live.staticflickr.com/65535/51511181253_5c40f10dcf.jpg"Double glazed
W12 TW4 windows are TW16
W12 comprised of two panes of
Window repair glass along
E8 W12 with a layer of air or [[
https://www.repairmywindowsanddoors.co.uk/shepherdsbush-windowrepair/ W12]] gas. The windows are then
W12 enclosed.