Ultra-slim, sealed double-glazed units
Fits into most single-glazed openings
Warm Edge Spacer Bar reduces perimeter condensation
Approved Document L thermal performance
Elastic dry glazing sealant for durability
The diagram reveals the construction of our sash window replacement glass units.
Two panes of 4mm glass are filled with a heavy gas, which aids acoustic performance.
The inner pane is a Low-E glass, which reflects heat back into the room.
A Warm Edge Spacer Bar (shown in black) reduces perimeter condensation.
We always install the sealed units with 6mm beading to ensure good weather deflection, and to preserve the life of the window for many years.