EFCO 8800 Series Assembly Instructions Vol.5 - Manual (Page 62)

EFCO 2009 Page 62
Series 8700 / 8800 Unitized Curtain Wall Assembly Instructions - Volume 5
Figure 135
Section 27 - Assembly and Glazing - SSG Vent at Stack Sill
18. Using an approved solvent or cleaner, clean the sealant contact surfaces of the glazing and head and sill fins of all oils and other contaminants.
19. If sealant primer is required, apply it per the primer/sealant manufacturer’s instructions.
20. Insert backer rod between the glazing and head and sill fins. See Figures 137 and 138.
21. Apply sealant into the void between the adapters and glazing. If the sealant is properly and carefully applied, masking tape is not necessary on the adjacent
surfaces.
22. Before the sealant begins to cure or skin over, tool the sealant into the joints smoothly, taking care to smooth and blend the sealant at each end of the head
and sill fin bars as shown below. Seen in section view, the sealant should have an hourglass shape and maintain a 2:1 width to depth ratio Remove any
excess sealant from the surrounding surfaces before the sealant begins to cure.
23. The glazed vent should not be moved before the structural sealant joints cure and per the sealant manufacturer’s recommendations.
Figure 138 - Head
Figure 137 - Sill
Figure 136
Figure 139
Apply backer
rod silicone
sealant into
the void and
tool smooth.
Apply backer
rod silicone
sealant into
the void and
tool smooth.
Tool sealant
smooth.
Tool sealant
smooth.