Zip System Rainscreen from Huber Engineered Woods meets code requirements for a 3/16‑inch drainage space behind stucco and adhered stone assemblies to enable them to dry out. The rainscreen consists of a rigid drainage mat covered by a heavy-duty fabric that’s approved as a secondary water-resistive barrier; Huber says combining the high compression strength of the 1/4-inch drainage mat with the 5-to-7-perm WRB promotes durability and effective moisture management.

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