| Window
Tech Systems Inc., a manufacturer of thermally insulated
aluminum replacement windows, has the responsibility
of supplying acceptable quality windows to governing
specifications for the construction industry.
Window Tech Systems is not engaged
in the business of installing or erecting windows
and therefore does not assume the responsibility of
quality, workmanship, or adequacy of installations
performed by other companies.
Aluminum Replacement Windows
Installation
Installation materials and procedure
involving anchors, blocks, shims, and fasteners should
be specified by the architect or contractor.
To assist installers, however, installation
guidelines hereby are provided for their consideration.
When ordering window sizes, specify one of the following sets of dimensions:
- Exact width and height dimensions of the window - Window Tech Systems windows will be manufactured to the ordered dimensions.
- Width and height dimensions of the opening using the smallest of three width and height measurements - Window Tech Systems' normal cut backs on the window are 3/8" on the width dimension and a minimum of 1/4" to the nearest 1/4" on the height dimension.
For a single window to be installed
in an opening, the procedural steps listed below may
be employed.
For two or more aluminum windows to
be installed in an opening, windows with the following
frame members are available.
MALE/FEMALE FRAME MEMBERS SELF MULLED WITH ADJACENT
WINDOWS. Frame members shall be securely fastened
front and back at the two end and center locations
at the job site with heat treated stainless steel
screws.
REGULAR FRAME MEMBERS JOINED WITH STRUCTURAL ALUMINUM
H-MULLIONS. Frame jambs of each window shall be
rigidly fastened front and back to the H-mullion at
the head, center, and sill locations at the job site
with heat treated stainless steel screws.
COMMON JAMB MULLIONS WITH CONTINUOUS HEADERS &
SILLS. Multiple twin or triple double hung windows
are pre-assembled at Window Tech Systems' plant.
The procedural steps below may be followed to complete
the installation of the multiple window units.
The selection of the window assembly to be employed
in openings shall be made by the appropriate architect
or contractor, who best knows the thermal, wind load,
and structural requirements for the installed windows.
RECOMMENDED INSTALLATION PROCEDURE
- Check width and height of the frame opening and
of the replacement window to ensure the right window
is being installed.
- Inspect and operate moving components of the replacement
window with the center strapping band in place.
This procedure verifies acceptable quality of the
replacement window prior to installation and removal
of the old window.
- Remove inside trim and frame of the old window
unit. Depending on its condition, the inside trim
may be reused. Clean blindspot and casing areas
against which the replacement window will butt.
- Place sill angle on bottom casing toward the outside
of the building. Deposit a 1/4" bead of caulking
around the periphery of the inside face of the blindspot.
- Install replacement window. Retain center strapping
band on the window to keep both sash in place and
to maintain vertical frame alignment during installation.
- Slide head expander up firmly against the top
casing. After centering the window in the opening,
screw jamb alignment clips to achieve plumb and
straight jambs. Proper execution of this step is
extremely important to ensure good operation of
the double hung sash.
- Fasten properly aligned window to casing with
installation screws inserted through the jambs.
Care must be taken to avoid over tightening or under
tightening the screws, which may disturb alignment
and create gaps between the window sash and frame.
- Close and lock the window sash. Adjust for squareness
with shims where necessary. Remove the center strapping
band only at this stage of installation. Use additional
shims if needed to attain smooth operation of each
sash.
- Depending on the specification, fill all voids
between the new window and existing construction
with insulation to eliminate drafts and airflow.
- Caulk all windows where necessary to ensure airtight
and waterproof installations.
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