AN UNBIASED VIEW OF SASH WINDOW DRAUGHT PROOFING

The glass in previous windows may be the extremely early 'plate' or 'wide' glass to 'crown' or 'cylinder'.[five] Old glass is recognised by its imperfections ('ream') which lead to optical distortion.In centuries previous, sash windows tended to have good glazing bars dividing up more compact panes, which contributed greatly to their elegance.Their