Oldcastle BuildingEnvelope ICW-250 - Manual (Page 5)

FIELD CONDITIONS:
All material to be installed plumb, level, and true. Aluminum to be placed in direct contact with masonry or
incompatible material, should be isolated with a heavy coat of zinc-chromate or bituminous paint.
After sealant is set and a representative amount of the wall has been glazed (250 square feet or more) run a water
hose to check installation. On large jobs hose test should be repeated during glazing operation. Test should be
conducted in accordance with AAMA 501.2 specifications. In addition, prior to glazing it is often beneficial to tem-
porarily plug the horizontal weep holes and flood the glazing pocket with water to check the sealant workmanship
of the end dams.
Coordinate protection of intalled materials with general contractors and other trades.
CLEANING MATERIALS:
Cement, plaster, terrazzo, alkaline and acid based material used to clean masonry are very harmful to finishes and
should be removed with water and a mild soap immediately or permanent staining will occur. A spot test is recom-
mended before any cleaning agent is used.
EXPANSION JOINTS:
Expansion joints and perimeter seals shown in these instructions and in the shop drawings are shown at normal
size. Actual dimensions may vary due to perimeter conditions and/or differences in metal temperature between the
time of fabrication and time of installation. For example, a 12 foot unrestrained length of aluminum extrusion can
expand or contract 3/32 of an inch over a 50 o F change. Any movement potential should be accounted for at the time
of the installation.
THERMAL IMPROVEMENT SUGGESTIONS:
To maintain or improve your wall installation the following items should be considered.
A. Blinds or drapes prevent warm air from washing the window.
B. Warm air ventilators too far from the window will not adequately wash the window with air to prevent
condensation.
C. In extreme conditions the fan of the heating system should not cycle on and off, but should run
continuously.
D. Some heating systems have a water injection feature that can raise humidity levels. The higher the
humidity level the more likely condensation or frost will form. Raising the temperature and reducing the
humidity will usually solve the problem.
E. On rare occasions an extremely cold storm may cause frost to appear on the glass or framing. A space
heater and electric fan blowing along the plane of the window wall can reduce or eliminate this temporary
condition.
Please note:
One or more items shown in this manual are patented IE., 4644717 or applied for.
SEPTEMBER 2012 5
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Web Address: www.oldcastlebe.com