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New Casement Window Draughtproofing

To provide a good seal for casement windows, Conservation Joinery uses the Aquamac 21 system, which has a positive engagement with the window frame rather than relying on a simple flat adhesive bond.

Technical specification
A Seal gap – 5 mm minimum to 7,5 mm maximum
B Kerf slot width – 2,7 mm nominal
C Minimum kerf slot depth – 5,5 mm