bayer

Sash Style casement window

The renovation of historic and listed buildings can be very challenging especially when it comes to the sensitive conservation of the visual features of old facades. The challenge is even greater when there is the ambition to improve the comfort and energy-saving qualities of a building.

For those requiring new vertically sliding sash windows for old buildings, until now, only improved versions of traditional sash windows were available. However the air leakage from these, although substantially improved, is still far beyond that allowed in a Passive House.

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