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Techincal
Information in the News! |
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As
the industry has evolved, it has adopted for itself the term Exterior
Insulation and Finish System, or EIFS, reflecting the unique feature
of nearly all the proprietary products, i.e., the use of some
type of insulation board applied to the exterior of wall's structural
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One
of the oldest most commonly used materials in residential and
commercial construction for exterior wall and soffit surfaces
is cement plaster, or stucco. |
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As
a direct cause of mold, the use of wall covering on the interior
surfaces of the exterior walls of a building does not pass the
"but for" test; only water does. Without the accumulation
of water within a wall, mold will not occur. Water within the
exterior wall construction ok as is come from three sources... |
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Buildings
stay dry because their interior space is protected from the exterior
elements by a barrier separating inside from outside. This barrier
must be "weather-proof" as opposed to "waterproof."
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Perhaps
the single greatest challenge in designing and constructing weather-proof
buildings is handling the window openings correctly. Rather than
a component separate and apart from the weather envelope, windows
are an integral part of the weather envelope... |
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Flashings
at the top of windows and exterior walls referred to as "head
flashings" will not protect the window from water intrusion
without counterflashing... |
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Flashings
are the devices used to keep any water stopped by a barrier or
collected in a wall under control until it can be redirected and
deposited to the outside of the building... |
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Counter
flashing is the term used to describe that part of the flashing
system that collects water from above and ensures that it drains
onto the top surface of the flashing below it instead of behind
it... |
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Scuppers
are very problematical in construction, very often serving
as a conduit for water to get into a building as much as
to get off of a building. Scuppers are those small openings in
exterior walls that allow water from roofs or decks to drain off
through a guard wall or parapet. In multifamily residential construction,
they are usually made of small sections of sheet metal tubing,
like "drain pipe', four-to six inches across, and three-to-four
inches high... |
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n
pre-cast, pre-stressed concrete, a side effect of the constant
force in the cables, in effect "squeezing" the concrete
together, over time, results in the concrete components shortening,
a phenomenon referred to as creep... |