Glazed fac ̧ades have been associated with hi-tech architecture since
the 1970s. The increasing use of this type of cladding is largely due
to developments in toughened glass and improved qualities of
elastomeric silicone sealants. The properties of the latter must
incorporate a resilience to varying atmospheric conditions as well
as the facility to absorb structural movement without loss of
adhesion.
Systems † two edge and
four edge.
The two edge system relies
on conventional glazing
beads/fixings to the head
and sill parts of a frame,
with sides silicone bonded to
mullions and styles.
The four edge system relies
entirely on structural
adhesion, using silicone
bonding between glazing and
support frame † see details.
Structural glazing, as
shown on this and the next
page, is in principle a type
of curtain walling. Due to
its unique appearance, it is
usual to consider full
glazing of the building
fac ̧ade as a separate design
and construction concept.
BS EN 13830: Curtain
walling. Product standard;
defines curtain walling as
an external vertical building
enclosure produced by
elements mainly of metal,
timber or plastic. Glass
as a primary material is
excluded. Note: Sides of frame as head.
Structural Sealant Glazed Cladding