Installation Instructions

* Installation Instructions
Read BEFORE Backfilling
The Bilco Company, New Haven, CT, 06505, www.bilco.com
STKLBL002 R-3
7 8 3 4 4 6 0 5 0 1 2 8
MODULE INSTALLATION
Install bottom window well module so that it rests on flat, undisturbed
soil as shown in Figure 2. Mount and anchor module into position as
instructed below.
Wall Mounting: It is important to maintain a 53-1/2” on center dimen-
sion between the keyholes on each flange to ensure proper fit of the
optional well cover. Use 1/4” (.250”) diameter masonry fasteners (not
supplied) to anchor module to wall. Fasteners must be designed for
the wall material to which attachment will occur and be at least 1-3/4” in
length. Use a minimum of (3) fasteners per mounting flange (6 per
module) for proper installation. Method of attachment must be adequate
to restrain earth loads imposed on the well.
IMPORTANT
Buck Mounting: When mounting to a window buck, utilize the back-
out screws provided in the buck for attachment.
After the module is fully anchored, remove the top inserts so that the
next module can be installed. This is done by removing the retaining
screw and washer as shown in Figure 1.
Slide the next module in place so that the modules interlock as shown
in Figure 3 and anchor module as instructed above. Replace the in-
serts into the lower module and secure with retaining screw and washer.
Make sure that insert tabs are placed under the retaining pins as shown
in Figure 4. Repeat process until all modules are installed.
BACKFILLING
FAILURE TO PROPERLY BACK FILL WILL VOID WARRANTY
If sandy soil exists, line the opening with a permanent barrier (such as
house wrap) to restrict sand from washing into rock.
Figure 1
Figure 2 Figure 3
Slot
Tab
Figure 4
Tab
Inter-lock
Modules
Retaining
screw and
washer
Remove
upper inserts
to inter-lock
modules
Insert
Insert
Outside of Well: Backfill evenly by hand on all sides as the hole is filled
in; Do not do one side at a time. Always use 3/4” clean free-draining
rock or A6 stone completely around the well at least 12” in width to iso-
late the well from the earth. Fill area to within 4” of top module. This will
keep window well movement to a minimum during cold weather freeze/
thaw conditions and settling soil. Do not use expansive soils, frozen
soils, material that has debris, or organic material.
Inside of Well: Place the free-draining rock in the bottom of the well to
within 1” of the window sill. If a perimeter drainage system exists, it is
best to tie the well drainage into this system by running a pipe extension
up from the drain line to the base of the well. Make sure that the free
draining rock fills the space directly under the deepest well module to
the bottom of the excavation. Do not settle material around the well with
water.
Undisturbed Soil