BS 644:2012

Timber windows and doorsets. Fully finished factory-assembled windows and doorsets of various types. Specification. | Status: Confirmed, Current

1 Scope This British Standard specifies requirements for the design, construction and performance of fully finished and glazed factory-assembled timber windows and external pedestrian doorsets of various types. This British Standard applies to windows and doorsets that have been treated with either opaque or non-opaque finishes or that are designed to support an externally fixed covering of another material, and that have been factory-glazed. It does not apply to windows or doorsets supplied as kits for site assembly. This British Standard does not apply to composite doorsets as defined in BS 8529:2010, but does cover doorsets that are predominantly timber-framed (stile and rail construction) with replaceable composite panels. It applies to windows and doorsets fabricated in a factory, to be installed vertically (±15°) into the external face of buildings, as single or multi-light units, or in coupled assemblies when appropriate, of the following types:

1. a) windows:
   1. 1) hinged: side-hung (open in or out), top-hung (open out), bottom-hung (open in), tilt and turn or turn before tilt;
   2. 2) projecting: side-hung (open in, open out or reversible) and top-hung (open out or reversible);
   3. 3) pivoted: horizontal and vertical (hung centrally or off-centre);
   4. 4) sliding: horizontal and vertical;
   5. 5) fixed light (direct glazed frames);
   6. 6) fixed casement;
   7. 7) parallel opening;
   8. 8) double opening French casement windows;
2. b) doorsets:
   1. 1) single leaf, single-swing or double-swing doors with or without side lights and top lights;
   2. 2) double leaf, single-swing or double-swing doors with or without side lights and top panels;
   3. 3) single track sliding doors;
   4. 4) single track sliding folding doors;
   5. 5) inward or outward opening doors.

It is applicable to assemblies in which any frame member is not longer than 3 m. It does not apply to curtain walls that span across horizontal structural members of floors but is applicable to windows or doorsets within a curtain walling system. It is applicable to assemblies up to the factory gate.

NOTE Guidance on the evaluation of conformity is given in Annex A. Guidance on durability and recycling is given in Annex B.