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Infrared surveys in hot climates
by Brett T. Fagan, PE, and Adrian Gerard Saldanha
All images courtesy Building Diagnostics Inc.
SHEATHING DECAY CAUSED BY
TRAPPED WATER IN BUILDING
WALLS IS A LEADING CAUSE OF
UNFORTUNATELY, BECAUSE SHEATHING
IS CONCEALED AFTER CONSTRUCTION,
THIS ONLY BECOMES EVIDENT AFTER
CONSEQUENTIAL DISTRESS DEVELOPS
IN THE STRUCTURE OR FINISHES.
Sheathing’s hidden location makes it difﬁcult to
evaluate its condition. Countless investigations
have demonstrated it can be consumed by
rot without detectable signs or symptoms,
such as leaks to the building interior, odor,
or cracks in interior and exterior ﬁnishes.
Therefore, the ability to detect trapped
moisture within the assembly is essential
in evaluating an exterior wall’s durability.
Although excavations are usually necessary,
ﬁnding hidden water using non-destructive
techniques such as infrared thermographic
(IRT) surveys can be useful when the
techniques are used correctly. 1
34 the construction speciﬁer | october 2013
9/12/13 9:11:33 AM