A Window is defined as an opening in a wall of a building to serve one or more of the functions like natural light, natural ventilation and vision.
The main function of a door in a building is to serve as a connecting link between the internal parts and to allow free movement to the outside of the building.
– Windows are classified as Fixed windows, Sliding windows, Pivoted windows, Double-hung windows, Louvered windows, Casement windows, Metal windows, Sash windows, Corner windows, Bay windows, Dormer windows, Clerestory windows, Lantern windows, Gable windows, Ventilators, and Skylights.
– The window/door system shall be Kite marked in compliance with BS 7412:1991 and BS 7950 (formerly PAS 011),
Using materials Type A complying with BS 7413:1991, and the window fabricator/installer shall be a Licensed Kite marked manufacturer to BS 7412 and BS EN ISO.9002:1987/BS 5750: Part 2:1987. and a full copy of his licence shall accompany the Tender.

Functional requirements:
– Safety – comply with relevant health and safety legislation, including the Construction Design and Management (CDM) Regulations.
– Strength, stability and airtightness.
– Fire safety.
– Provision of ventilation.
– Resistance to the passage of heat.
– Resistance to the passage of sound.

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