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Handling
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If the
material is not to be used immediately, it
should be stored in a dry place. Moisture
trapped between sheets may cause damage to
the paint system. The paint system may
become soft or water stains may appear which
can detract from the appearance and effect
the service life of the material. To avoid
problems store the materials in a well
ventilated dry area. Stack the materials in
an inclined position.
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DO
NOT USE PLASTIC TO COVER MATERIALS. THIS CAN
CAUSE SWEATING OR CONDENSATION.
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While
unloading, all bundles must be lifted from
the center. Do not unload in a jerking or
bouncing fashion. Panels greater than 25' 0"
long should be unloaded using a spreader bar
to prevent panels from bending.
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Although
the paint coating is tough, dragging panels
across the surface of one another will
almost certainly mar the finish.
Ventilation
Proper design
and installation of vapor barriers and
ventilation systems are important to prevent
condensation and the resulting problems of
moisture damage and loss of insulation
efficiency. Condensation occurs when moisture
laden air comes in contact with a surface
temperature equal to our below the dew point of
the air. This phenomenon creates problems that
are not unique with metal buildings; these
problems are common to all types of
construction. In addition to providing
resistance to heat transfer, insulation can also
protect against condensation forming on cold
surfaces, either inside the building or with in
the wall and Roof system cavity. The arrangement
of the building insulation system and vapor
retardant is the responsibility of the building
designer. these are some basic guidelines to
help control condensation.
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The insulation should have a vapor
retardant face on the "warm" side of
the insulation. For most buildings,
this means that the vapor retardant
is on the inside surface (toward the
building's interior).
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The thickness of the insulation must
be designed to maintain the
temperature of the vapor retardant
above the interior dew point, using
the worst case expected outside
temperature.
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All perimeter conditions, seams and
penetrations of the vapor retardant
must be adequately sealed in order
to provide a continuous membrane to
resist the passage of water vapor
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Building ventilation, whether by
gravity ridge vent, vent, power
operated fans, or other means
contributes significantly to reduced
condensation. The movement of air to
the outside of the building reduces
the interior level of vapor
pressure. On buildings that have an
attic space or are being retrofitted
with a metal roofing system, vents
should be placed at both the eaves
and peak of the roof in order to
prevent a building of moisture
(humidity) in the attic space.
Contact your local building code
officials or an engineer on proper
ventilation practices for your area.
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