http://internationalcryptozoologymuseum.com/News/why-you-should-consider-double-glazed-sash-windows-/ You will come across sash windows everywhere. They have made a modern day resurgence, so you will see them in many housing estates, but as they have been around for a long time you can see them in houses up to five centuries old. If they are in an old residence and are in need [.] Related posts: How And Why To Upgrade A Sash Window. Timber or uPVC Sash Windows? Sash Window Repair And Sash Window R... Wed, 10 Mar 2010 09:55:59 CST en