Detailing a Proper Drainage Plane for Stucco

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A recent article in the Journal of Light Construction provided the following installation detail for ensuring a sufficient drainage plane behind one-coat stucco:

Cementitious backerboard provides a more durable substrate for synthetic stucco than foam insulation board. The backerboard must be installed over mesh furring strips to provide a drainage gap so that any water that gets through the stucco is directed to weep areas at windows and wall skirts.

According to the article:

“Cementitious backerboard provides a more durable substrate for synthetic stucco than foam insulation board. The backerboard must be installed over mesh furring strips to provide a drainage gap so that any water that gets through the stucco is directed to weep areas at windows and wall skirts.”