Subscribe to this blog

Subscribe to full feed RSS
What the? RSS?!

Subscribe Via Email

We respect your privacy.

Greenhouse Glass

By admin On September 30, 2008 Under Greenhouse Gardening

Although initially expensive during the early 1800’s, glass has proved to be the best covering for greenhouses, sunrooms and conservatories. The greatest impetus to its use in Britain was the abolition of the glass tax in the mid 1800’s and the construction of the glass-clad Exhibition Hall for the Great Exhibitions of 1851.

Early greenhouses had panes of glass 30 cm/12ins or less wide, but when glass-making techniques improved these became 45cm/1 1/2ft wide and are now frequently 60cm/2ft across. The use of wider panes was made possible by the introduction of extruded aluminium glazing bars, which are both stronger and lighter than wooden types.

Glass used in greenhouses must be free from bubbles, with a standard weight of 7.32kg/sq cm (24oz/sq ft). The total weight of glass in a greenhouse is considerable, giving the framework rigidity as well as weight to resist winds and storms.

When clean, only 85-80% of the available light passes through, but if dirty this decreases dramatically. In summer, this reduction is not a problem, as the glass will probably be covered in a shading material, but in winter and spring all available light is needed.

Related Posts

  • No Related Post