EFCO 8800 Series Assembly Instructions Vol.2 - Manual (Page 7)

EFCO 2009 Page 7
Series 8700 / 8800 Unitized Curtain Wall Assembly Instructions - Volume 2
Section 4 - Unit Glazing Preparation : SSG and Captured
Figure 4
5. Apply the WC18 spacer gasket to the mullions as shown below and on page 6. The gasket will run through vertically, and butt together at the corners (see
Figure 4). “Crowd” in extra gasket, (approximately 10% extra) where it runs between the vertical 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 2).
6. 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 and skin over (See Figure 3).
Apply WC18 gaskets
flush with the side of
the mullions.
Figure 2
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 3
Isolator
Reglet
Butt gaskets at
D.L.O. corners.
Butt gaskets at
D.L.O. corners.
SILL
INTERMEDIATE
HEAD
Butt gaskets at
D.L.O. corners.
JAMB
JAMB
JAMB