Double glazing conversion frame - has L-section member with channel receiving Z-section element to form mastic retainer

摘要

The range may include primary 'L' section (1) with a channel formation (C) towards the bar extremity. The section sits on the existing frame with the channel (C) in the rebate (R). A 'Z'-section (2) clips into the channel (C) to form a mastic (M) retainer and a double or singly webbed 'I' section (3) is used as a pane (9) spacer. To gain extra width a primary section without a leg may be used. The channel locates inside the frame and one of the secondary panes in the existing rebate (R). Subsidiary glazing bars may be dummies in hinging panels.