EFCO Special Purpose Windows Installation - Manual (Page 15)

EFCO CORPORATION 3/5/2014 PART NO. YW40 Page 5 of 7
Window Installation Instructions - Basic Window Installation Section -
General Installation of Side Stack Window Systems
If side stacking is utilized, it will be necessary to either stack the units together prior to placing them in
the opening, or placing them in the opening and sliding all units to one side, allowing for the last unit to
be installed.
Slide units all the way to one end to allow the
last window to be installed. Reposition units
after the last window is stacked into provide
equal spacing.
See the shop drawings
for expansion joint
dimensions at stacks.
Critical field seal.
To ensure a watertight seal, backbed the
interior and exterior stack legs with silicone
sealant before assembling windows.
After final positioning of the windows, clean
off any excess sealant from the face of the
window.
Do not remove sealant from the joint
between the windows. If the joint has any
voids, apply additional sealant completely
filling the joint.
Completely read the General Installation Instructions and all other sections which pertain
to your project before starting work. These recommendations are for general erection
procedures only. For actual job conditions, see the details on the shop drawings. For
perimeter anchor types and spacing, refer to the approved shop drawings or consult the
project design professional.
Apply a bead of
silicone to the
interior and
exterior stack legs
before assembly.