Can anyone tell me:
a) Why aluminium has largely replaced steel as a material for metal window
b) Aluminium windows can be installed directly onto the brickwork, or attached
to a wooden sub frame which is then attached to the brickwork. What are the
relative merits of each method?
c) Do Aluminium frames corrode?
Aluminium actually corrodes much more rapidly than steel. However, unlike
steel, the corroded metal forms an excellent waterproof barrier that limits
the depth of the corrosion to a microscopically thin layer.
Steel window frames are welded then galvanised. Definitely a process
for big company mass production. Aluminium windows are made up from
extruded sections and joining pieces so almost anyone could start
making them with a relatively small outlay.
Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser http://www.sda.co.uk/qsedbuk.htm
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