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38 <br /> maintain the vapor permeable advantages of Faswall®Wallforms it is it is important to use vapor J <br /> permeable stucco/plaster mixes. <br /> 12.3 Stucco <br /> There are many stucco techniques that are compatible with Faswall. It is an excellent substrate <br /> for stucco to"key"into. However, it is very important that the stucco system chosen is VAPOR <br /> permeable. The hygroscopic quality of the Faswall material must be maintained allowing water <br /> vapor to travel through the walls. <br /> The stucco materials that have these qualities are: <br /> Cement based stucco <br /> Cement based stucco with vapor permeable acrylic modified pigmented finish coat. <br /> Lime based stucco <br /> NOTE: Stucco has a tendency to crack. Hair line cracking is not detrimental to the Faswall <br /> material. It is a dynamic material that dries out readily if small quantities of water were to <br /> get into cracking. <br /> 12.3.1 Cost Effective Basic Cement Stucco Protocol <br /> A basic scratch coat is applied on the Faswall®Wallform surface made on-site from 3-4 parts <br /> masonry sand to one part gray Portland cement. This may be either sprayed on(gunite type of <br /> equipment)or troweled directly onto the Faswall® Wallform surface. Depending on the surface <br /> smoothness desired,a second brown coat may need to be applied. A fiber additive in the cement <br /> preparation or applying a fiberglass mesh (EIFS, 'R"mesh) embedded into the scratch coat is a <br /> common method used to minimize cracking in the stucco. Commercial premixed fiber-added <br /> cement stuccos are also available on the market. <br /> Applying the fiberglass mesh is added insurance against cracking. A common technique is to <br /> trowel on the scratch coat and lay the mesh into the coating pressing into the scratch coat until <br /> embedded. Alternatively,woven fiberglass mesh may be fixed to the Wallforms using stainless <br /> steel staples. Trowel on the scratch coat making sure the mesh gets embedded into the coating. <br /> This may be applied up to 3/8"thick. Stucco should be applied over slightly wet Faswall® <br /> Wallforms to avoid a fast drying action that may lead to cracking. It is important not to soak the <br /> Ili ill <br /> -- - ----. <br /> Shelter Works General Application and Technical Information(GATT)version 2.5 <br />