Allan Seddon - (photo 1950's)
Fibrous plaster first was introduced to Dunedin in 1890
and the business of fibrous plastering was commenced
in Mosgiel by Allan Seddon in 1953. Seddon’s are now
the major manufacturer of fibrous plaster in the lower
South Island of New Zealand and this family tradition has
continued to the present day with John Seddon now as
Seddon’s Managing Director.
The current board of Directors have had a long and extensive experience in
the building industry. Their commitment to the development and expansion of
fibrous plaster as a quality building product has seen the development of interior
ornamental mouldings, gas fire surrounds, and new unique cornices.
The term 'fibrous plaster' is usually used to describe
a thin lightweight modular construction composed of
fibreglass rovings soaked in gypsum plaster and cast
in a mould. The technique superseded solid lime and
gypsum plaster for fine decoration in the late 19th
century and is the principal form used today for cornices
and other fine decorative work.
The Origins of Fibrous Plaster
The technique of reinforcing gypsum plaster with hessian
or canvas has been known and used for thousands of
years, and probably predates the Pharaohs. However,
modern fibrous plasterwork can be said to date from
Leonard Alexander Desachy’s patent of 1856, which
drew on a Parisian formula.
In recent years, fibrous plaster has come into its own, as increasingly flexible
moulding compounds have made it possible to produce casts with fine sharp
relief, undercut decoration, piercing and inlays, and modern plasters have also
increased strength and lightness.