New wooden window frames The increasing use of sealed double glazing units has led to most manufacturers supplying new wooden frames with glazing rebates of sufficient depth to take standard sealed units up to a maximum thickness of about 20mm. By choosing your supplier carefully you will be able to order both frames and glazed units at the same time.
You won’t need to measure for the glass if the frame is one of the many standard sizes available. If you need to have frames made, you should make it clear to the carpenters & joiners that you will befitting sealed double glazing units. He will then make allowance for this when making up the frames Normally, the glass is fitted using wooden glazing beads to hold it in place and putty or a similar glazing mastic to provide a seal between the unit and the frame. Acrylic putty is coming into use now and is ideal for double glazing units.