Tyvek DrainVent Rainscreen or two layers of Jumbotex?
Saw this Tyvek DrainVent Rainscreen product on the Musings of an Energy Nerd blog. Here in Southern California, it’s typical to see two layers of Jumbotex used under stucco. What would you choose: Tyvek wrap, with two layers of Jumbotex, then stucco? Or: Tyvek wrap followed by Tyvek DrainVent, then stucco? The DrainVent seems to be a more consistent way to get the necessary drainage gap under the stucco. Would a layer of Rigid Polyiso Foam board be a good idea also? What would be the recommended way (where in the assembly) to incorporate a layer of Polyiso board? Tyvek wrap, Polyiso board, Tyvek DrainVent, then stucco?
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