EFCO Special Purpose Windows Installation - Manual (Page 51)

EFCO 2014 12
Window Installation Instructions - Typical Subframe Installation Section
Mullion Installa on Into Subframe
 A ach the 4” pressure clip at the sill end. It
should contact the subsill.
 Seal this pressure clip to the subsill and both
window jambs.
 Seal over the head of all fasteners that pierce
the 4” clip.
 Note: The sealing of this 4” pressure clip
is criƟcal and should be done just prior
to installing the verƟcal cover.
 Field cut and/or notch the ver cal cover and
snap over the mullion clips.
 Fillet seal the exterior of the mullion to the
window jambs.
 Seal the head end of the mullion to the
subhead.
 Seal the sill end of the mullion to the
subsill.
 Join all exterior sealant lines.
 Tool sealant and inspect for pinholes.
Notch at subhead may be
required (see shop drawings)
Notch at subsill may be
required (see shop
drawings)
Take care to not
damage finish or
dent cover when
snapping on.
Seal 4” clip to subsill,
tool sealant into all
crevices and hollows
pay special a en on
to this hole
Seal 4”
clip to both
window jambs
Join sealant lines
Cover all fastener
head with
silicone sealant
and tool
Join sealant lines
Seal sill end to
subsill (sim. at
head end)
Seal mullion
to both
window
jambs
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