A Simple Key For sash window draught proofing Unveiled
Even though warmth does go through the glass alone, under a quarter of the heat transfer via a typical sash window is by conduction, the rest is by air infiltration – draughts.The glass in outdated windows is usually the incredibly early 'plate' or 'broad' glass to 'crown' or 'cylinder'.[5] Old glass is recognised by its imperfections ('ream') wh