Compartmentalization of the cavity wall system will equalize the negative
pressure within the wall cavity to the exterior positive pressure more
quickly and efficiently when using PVC brick vents, cell vents or open head
joints.
This is of
significant importance when considering that a driving rain is sucked
through the brick veneer into the cavity by the negative pressure within the
cavity.
The quicker the
pressure is equalized the less the water in the cavity.
It is very
important to compartmentalize at the corners to avoid air flowing around the
corner carrying moisture down the adjacent cavity.
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