The history of windows: Part 2

Window design in the middle ages was dictated mainly by the limitations glass manufacture imposed. Historically there were two types of glass, Cylinder and Crown named after their method of manufacture. To manufacture cylinder glass the glassmaker blew a sphere with the molten glass and then swung it back and forth until it was shaped like a cylinder. He then cut the cylinder along its length and flattened it into a sheet.

In crown glass manufacture the blown sphere was attached to an iron rod before removing the blowing iron, which left a hole at one end. The sphere was then rapidly rotated, centrifugal force expanding the hole until the sphere formed a disc from which panes could be cut.

Cylinder glass was inferior to crown glass, which could be manufactured thinner. From both types of glass it was however only possible to produce very small window panes (max 6″ x 6″) without distortion.

Initially glass was used almost exclusively for stained glass windows in cathedrals and churches. It was then gradually adopted by the wealthy and then eventually by everyone else.

The first ecclesiastical windows used wrought iron frames manufactured by a blacksmith into which the small panes were joined together using lead. This then led to the development of wrought iron casement windows (with at least one opening light); which albeit lacking the weather ability of modern windows ensured that houses could be ventilate.

Anglian Home Improvements, formally known as Anglian Windows, have been successfully trading for over 40 years. For information on our UPVC conservatory and window products please visit www.anglianhome.co.uk

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  • REX POGE

    I HAVE OWNED A JAGUAR XJS REG NO A860NVG FOR THE LAST 15 YEARS, IT WAS ORIGINALY PURCHASED BY ANGLIA WINDOWS IN 1984 FROM MANN EGERTON CROMER ROAD NORWICH, ANYONE HAVE ANY RECOLECTIONS OF THE CAR OR WHO DROVE IT WHEN IT WAS NEW

  • Hi Rex,

    We have spoken to our transport department but unfortunately they don’t hold records that far back. Perhaps the DVLA can help, the phone number is: 0870 240 0010. These people should hold registration details on most cars.

    If you have any questions please let us know.

    Kind regards

    Anglian Blog Team