Patent glazing is a system that allows glazed glass panels to be placed in a lightweight, no-load-bearing frame of glazing bars. The system does not use epoxy or other sealants to create a watertight seal.
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Patent glazing creates a well-drained structure that does not require four edged support beams, relying instead on two patent glaze bars that are attached to the structure. Each aluminium patent glaze bar is designed to seat the glass pane for its entire length. It uses caps, channels and groves to resist or trap water away from the pane.
Patent glazing systems can be used with either single- or double-pane glass. Panes must be able to withstand wind and snow loads and building movement. Laminate glass--as the single pane or the interior pane--reduces the danger of broken glass falling. When using a double-pane system, the interior pane is always shorter than the exterior pane, to allow for drainage.
A minimum slope of a patent glazing system is 15 degrees. If the slope is lesser, dirt build-up in run-off channels and other weather-related issues may occur. This could result in the structure's failure over time.
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