Window replacement lazing safety

Part N

Low level glazing (glazed areas within 800mm of floor level) and glazing in doors within 1500mm of floor level should generally be of a type so that if broken, it will break safely. In practice this means such glazing should be either laminated or toughened. Ordinary glazing can still be used in small pane sizes however, provided the glass is sufficiently strong to resist breakage. The Approved Document to part N of the Building Regulations gives maximum sizes according to the thickness of glass - for example, in a single pane less than 1.1m square - 8mm glass would be satisfactory.

Typically accepted standard current requirements

Replacement glazing should meet the current minimum standards as in the list below:

Safety glazing specifications should be installed to glazing within the following ‘critical locations’:

• Within 800 mm above floor level  
• Within 300 mm of a door, up to a height of 1500 mm  
• Within a door, up to a height of 1500 mm  

Manifestation (mainly non- domestic buildings)

To avoid building users with impaired sight colliding with large glazed panels, appropriate manifestation should be provided to highlight such glazing.