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My plans call for stucco on parts, not all, of my exterior elevations. As a treatment from finished grade up to a wood ledge detail at about waist height, the stucco is furred out from the wall with 2x strips. As an accent treatment in some other areas, it is applied directly over the sheathing. In both cases I presume stucco lath will be used. Can anyone point the way toward some text resources that discuss design, details, and installation techniques? Where we are building, we don’t have stucco contractors, and we will have to do it ourselves. EIFS (Sto and Dryvit) is not the way we wish to go. We have plenty of insulation within the walls and don’t need any more on the outside.
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Gene-
Contact the manufacturer(s) of any stucco-type products you're considering using and ask to be sent a copy of their technical specifications guide. This should contain a collection of approved or rated cross sections. You should be able to work off these drawings with some questions asked of the given company's technical support to accomplish your goal.
If you want to use portland, lime and sand, I think you will want to give very careful consideration to placement and integration into your design of expansion joints. That, or build the sections to be stuccoed of block.
Also, consider using rigid foam to build out.
I have applied fiber-reinforced stucco over frame without using expansion joints. Radial crazing should be expected to originate at inside corners. At points where elements with differing expansion characteristics meet in the structure, transverse (perpendicular to major length) cracking will likely occur. The underlying movements will generally be micro-climate events with much more cracking occurring on broad, sunny exposures and potentially almost none on small, shady, wall facets.
Lance
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My plans call for stucco on parts, not all, of my exterior elevations. As a treatment from finished grade up to a wood ledge detail at about waist height, the stucco is furred out from the wall with 2x strips. As an accent treatment in some other areas, it is applied directly over the sheathing. In both cases I presume stucco lath will be used. Can anyone point the way toward some text resources that discuss design, details, and installation techniques? Where we are building, we don't have stucco contractors, and we will have to do it ourselves. EIFS (Sto and Dryvit) is not the way we wish to go. We have plenty of insulation within the walls and don't need any more on the outside.