Herald Sash Windows

We have documentation to show that the Herald Sash Window can achieve a whole window value of 1.4 w/m²k which is equivalent to an A rated window.

This is achieved by the combination of:

The use of Accoya which is significantly more thermally efficient than normal timbers used.

Extensive draught stripping on the staff beads, parting beads, meeting rail and top and bottom of sashes, together with easy slide seals to the edge of the sashes.

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