Whether due to Listed Building requirements, or through a desire to conserve every ounce of original character, there will always be a demand for single glazing.
Whilst we specialise in traditionally designed double glazed replacements, and whilst it is possible to manufacture double glazed units using glass manufactured by traditional techniques, the true purists won’t settle for anything less than the real thing.
Not only can we source specialist hand-made glass replacements for the restoration and repair of your existing single glazing, but we also salvage beautiful and unusual pieces of period glass whenever we can, so we might even have a few pieces that you can’t get anywhere else!
Glass was hand blown into a hollow globe, also known as a ‘crown’. This ‘crown’ was then spun around at rapid speed, and began to flatten due to centripetal force – much like how spinning a lump of pizza dough will form a thin & flat circular base. These sheets of crown glass were already rather small, but the outer edges were thinner and weaker than the central mass. As a result, usable sections were cut from the central mass, thereby greatly restricting the maximum size of an individual pane.
Glass was hand blown into a hollow ‘sausage’ shape and the two ends were removed, resulting in a glass tube or cylinder. Whilst still molten, shears were used to split the cylinder down the middle and the glass was then flattened on an iron plate resulting in imperfect glass sheets. This process later became industrialised in the form of Cylinder Blown Sheet Glass.
Sheets of Broad Sheet Glass undergo an additional process of laborious hand grinding and intense polishing, resulting in a mirror-perfect finish.
Glass was hand blown into a large, cylindrical mould. This mould was then swung in a large trench to ensure that the molten glass spread evenly over the inner surface of the mould. Once the mould was opened, the cylinder of still-malleable glass was cut down the middle and flattened on to a table. This created much larger sheets than the Crown Glass method was capable of, without the imperfections typically associated with hand-formed Broad Sheet Glass.