The Definitive Guide to sash window draught proofing
A window sash is 50 percent of a traditional household window assembly. Window sashes slide in the window opening and include weather stripping for insulation purposes.The glass in old windows may be the incredibly early 'plate' or 'wide' glass to 'crown' or 'cylinder'.[5] Aged glass is recognised by its imperfections ('ream') which cause optical d