A glazing rebate is the rectangular recess along the inner perimeter of a window frame or sash into which the glazing is set and secured. The rebate determines how deep the glass sits in the frame.
Application
The glazing rebate has two sides: a fixed glazing edge (built into the profile) and a removable glazing bead on the other side. The glass rests on setting blocks at the bottom of the rebate. Key requirements:
- Rebate depth — must be sufficient to carry the glass safely and to leave room for sealant or gasket. Insulating glass needs a deeper rebate than single glazing.
- Ventilation and drainage — the rebate must be designed so that condensation and rainwater can drain away.
- Setting blocks — carry the glass and keep the correct edge clearance.
A well-executed glazing rebate is decisive for the lifespan of double glazing: standing water in the rebate is the main cause of misted units through failed edge seals.
Related terms
- Glazing bead
- Glazing
- Window frame
- Double glazing
- Rebate
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