EFCO 8800 Series Assembly Instructions Vol.5 - Manual (Page 18)

EFCO 2009 Page 18
Series 8700 / 8800 Unitized Curtain Wall Assembly Instructions - Volume 5
Section 20 - Unit Glazing Preparation - Vent at Fixed Horizontal
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 20 Figure 21
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 22). “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 20).
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 21).
SILL
INTERMEDIATE
HEAD
Butt gaskets at D.L.O.
corners (vertical
gasket runs through).
JAMB
JAMB
JAMB
Figure 22
Butt gaskets at D.L.O.
corners (vertical
gasket runs through).
Butt gaskets at D.L.O.
corners (vertical
gasket runs through).