The exact origins of sash windows are disputed, even so the earliest known examples day back to seventeenth-century England.  These strips are frequently well suited for draught-proofing a window with casements although not sash types.  Their ingenious well balanced structure would make sash windows a great deal more innovative than https://donovanwphvk.anchor-blog.com/16157603/the-smart-trick-of-sash-window-draught-proofing-that-no-one-is-discussing