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39 <br /> Faswall®Wallform completely. After a few days (depending on climate conditions), fine <br /> hairline cracks develop which show that the wall is ready for the final stucco coat. <br /> This first,basic coat requires up to 20%more stucco material than conventional concrete walls <br /> due to the porous surface of Faswall®Wallforms. The stucco penetrates into the wallfonn <br /> creating a monolithic bond to the Wallfonu surface. Subsequent stucco coats use the same <br /> amount of material as do conventional concrete wall systems. The wall should always be <br /> moistened first,but not soaked. Follow with a 3/8"top coat made from 3-4 parts masonry sand <br /> and one part white Portland cement. Top coat can be pigmented. Alternatively use the standard <br /> grey Portland cement brown coat topped by a mineral paint. These are silicate coatings that <br /> penetrate and chemically bond to their substrate rather than just coating it, and they last for more <br /> than a century without peeling or cracking. They are immune to damage by the sun's UV light <br /> and retain their colors.Buildings in Europe coated with this material still look pristine after one <br /> coat applied over 125 years ago.These paints are also fully breathable,in that they fully resist <br /> rainwater molecules from entering but fully allow smaller water vapor molecules to exit the wall, <br /> keeping it dry and free of mold. One company producing a mineral silicate surface coating is <br /> Keim Mineral Coatings of America,Inc. Charlotte,North Carolina; 866-906-5346. <br /> These systems breathe and the materials are significantly less costly than synthetics. However, <br /> adding an acrylic to the stucco provides some flexibility to the top color coat that can reduce fine <br /> line cracking. Again,always choose coatings that are vapor permeable. <br /> 12.3.2 Portland cement scratch coat followed by brown coat and then <br /> acrylic modified pigmented top coat. <br /> Apply a cement scratch coat with fiber additive directly against the Faswall®Wallform surface; <br /> a brown coat may be necessary depending on the finished look desired. Top it with pigmented <br /> acrylic modified stucco that is vapor permeable(check with manufacturers) <br /> 12.3.3 Lime based stucco. <br /> This is the premium stucco method. It is very long lasting and provides excellent protection <br /> against moisture. It remains fully vapor permeable. It is the most costly method but is the most <br /> durable. This generally needs to be applied by a professional. <br /> ShelterWorks General Application and Technical Information(GATI)version 2.5 <br />