According to the Stucco Manufacturers Association, the stucco industry has always maintained that one should anticipate incidental moisture to find its way behind the cement stucco membrane. The underlying water-resistant barrier (building paper or housewrap) should be integrated in a “shingle-fashion” with the nail-flange and flashings. This proven practice prevents water entry, meets code requirements and directs water down to exit at the base of the wall.
Details: Nail-Flange Flashing
February 18, 2016