Windows: Sizes

This is for the size in Millimetres (mm) that you would like the window manufactured to. This size is to include any Cill and will be manufactured to tolerances of 2-3mm. Please ensure the sizes provided are not tight brickwork opening sizes as your new window may not fit, always allow a tolerance of about minus 10mm in the width and minus 10mm in the height. (Reduce size further if your opening is not square, out of level or has protruding bricks as your new window must be installed square, level and plumb).

Assumptions: The normal width for a side opening sash is 600mm, this is measured from the edge of the outer frame to the centre of the mullion (vertical bar). Exceptions: If the window divides into equal parts of less than 650mm (divided by mulions) then your side opener will be set at an equal division. However, if you specify egress hinges it will revert to a 650mm wide section. If you specify easy clean hinges it will revert to a 600mm wide section. The normal height of a fanlight sash is 360mm, this is measured from the top of the frame to the centre of the transom (horizontal bar). Georgian bar, diamond and rectangular lead will be laid out according to our best practise.

If you are still having problems or have any questions please call our sales department on 01234 272 445.