Building Construction Handbook, Eighth Edition

Typical application ~

* Hollow profiles manufactured with a closed cell insulant foam/expanded polystyrene core.

Vertical

section

synthetic rubber

sealing strip

"L" shaped glazing

bead/clip and seal/gasket

glazed units of 3 mm

glass and 12 mm gap

or 4 mm glass and

16 mm gap

air, argon or krypton

filled gaps

casement frame*

window board,

material optional

synthetic rubber seal/gasket

middle and inner pane "E" coated

33 or 44 mm overall depth

synthetic rubber compression seal

standard head

and jamb profile*

hollow profile "plastic"

sections*, typically uPVC or

glass fibres with polyester

resin bonding

sill

Further considerations ~

* U value potential, less than 1.0 W/m^2 K.

* ``Low E'' invisible metallic layer on one pane of double glazing gives

a similar insulating value to standard triple glazing (see page 383).

* Performance enhanced with blinds between wide gap panes.

* High quality ironmongery required due to weight of glazed frames.

* Improved sound insulation, particularly with heavier than air gap fill.

Triple Glazing