EFCO 8800 Series Assembly Instructions Vol.5 - Manual (Page 20)

EFCO 2009 Page 20
Series 8700 / 8800 Unitized Curtain Wall Assembly Instructions - Volume 5
Section 21 - Unit Glazing Preparation - Vent at Stack Sill
Figure 65
Apply gaskets
flush with the side
of the mullions.
Isolator
Reglet
Insert a 3/8” backer rod into isolator reglets to
keep free of sealant. Remove the backer rod
immediately, before sealant begins to skin over.
Figure 24 Figure 25
4. Apply the WC18 spacer gasket to the mullions as shown below and on the previous page. The gaskets will run through as shown below. Butt the gaskets
together at the corners (see Figure 26). “Crowd” in extra gasket, (approximately 4% to 5% extra) where it runs between the gaskets to ensure a snug butt
joint at the corners. It is important that there are no gaps in the gaskets where they meet in the corners. Note that the gasket is not symmetrical, and must
be installed so that it is flush with the side of the mullions (see Figure 24).
5. A 3/8” backer rod should be applied into the isolator reglet to prevent sealant from getting into the reglet. Remove the backer rod immediately after the
sealant is applied, and before the sealant begins to cure or skin over (See Figure 25).
INTERMEDIATE
HEAD
Butt gaskets at D.L.O.
corners (vertical
gasket runs through).
JAMB
JAMB
Figure 26
Butt gaskets at D.L.O.
corners (vertical
gasket runs through).
INTERMEDIATE
JAMB
Butt gaskets at D.L.O.
corners (vertical
gasket runs through).