EFCO 8800 Installation Instructions - Manual (Page 31)

EFCO 2009 Page 31
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions
3”
e. Using an approved solvent or cleaner, clean the sealant contact surfaces of the expansion cavity of the stack sill and 17D9 of all oils and
other contaminants. See Figure 62.
f. Apply a generous amount of sealant in both ends of the cavity approximately 4” long. See Figure 62.
g. Place the HC07 foam backer into one end of the cavity with approximately 4” extending out of the cavity. The HC07 foam backer should be applied
to the jamb where the backer will be exposed after the frame has been set. See Figure 64. The HC07 will be applied at both jambs on the jamb
condition unit on each row. All sequential units will get sealant on both jambs but will only get one HC07. These units will get the HC07 in the jamb
opposing the previous unit.
h. Run a small bead of sealant (1/16” diameter) approximately 3” up from the bottom, in the female jamb interlock cavity only. See Figure 64. Apply
this sealant immediately before setting the unit. Do not apply too much sealant as this will interfere with stacking the frames together.
Section 7 - Unit Inspection and Preparation for Installation
Clean the cavity at the sill
approximately 6” to 8“ from each
end. Apply a generous amount of
sealant into the cavity.
17D9 Stack
Joint Caulk
Backer
Push the HC07 foam backer into the
cavity so that it forces the sealant into
all corners of the cavity to ensure a
watertight seal at unit installation.
Female Jamb
Interlock Cavity
Do not install unit if silicone
is skinning over. Remove
silicone and apply new.
Figure 62
Figure 64
Figure 63
SILL
MALE JAMB
SILL
SILL
JAMB
4”
SILL