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The principle of fully supported secret fix roofing is
centuries old and is seen on cathedral and church roofs.
The materials used were mainly malleable such as lead
and copper. Roll-formed self-supporting secret fix originated
in Australasia/USA approximately 35-40 years ago. They
were introduced into Europe approximately 25-30 years
ago and into the UK approximately 15-20 years ago.
Self-supporting secret fix roofing systems were introduced
to reduce the risk of leakage at fasteners and side and
end laps. Their success can be seen in the increasing
market share they are taking. Their design features allow
metal roofing into new markets such as very low pitch
roofing as a competitor to fully sealed membrane roofing.
The materials for roll-formed secret fix roofing are
primarily steel and aluminium, although other materials
are used but to a smaller degree. Most of today's profiles
are based on original Australasian/American concepts.
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