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Archive for April, 2013

Installing Stucco

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installing stucco

Stucco installation typically involves the application of the following three layers:
  • The Scratch Coat is the first layer and got its name because you need a scratch tool to help the other coats adhere.
  • The Crown Coat is the second layer that involves leveling out the stucco.
  • The Finish Coat is the visible exterior layer.
Stucco is best applied in cool to warm climates (never freezing or during a heat wave) when it’s cloudy outside so that the material doesn’t dry out. Keeping the stucco moist with water is very important during the installation process because this will also keep it from drying out and cracking.

Hard Coat Stucco Vs Synthetic Stucco

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hardcoat stucco

The process of installing stucco is one that should be taken seriously, because if installment is poor, the result could be rot behind the structure of your home. There are two types of stucco: hard coat stucco and synthetic stucco. Both forms have a bad reputation because of improper installation; however, synthetic stucco is worse than hard coat stucco in the sense that once moisture gets trapped, that synthetic stucco holds the moisture, which then rots the structure. Synthetic stucco was originally designed for commercial purposes; builders found it to be more cost effective and started using it over wood structures. When you combine putting synthetic stucco over wood with improper installation, you get rot. In a nutshell, this is a technique that should not exist in the residential market because it compromises the quality and safety of your home. The best way to resolve synthetic stucco is to tear it off and redo the house, which fortunately isn’t as expensive as some people think. At John Temmel Siding Guy, we only use stone accent and Hardie products, such as Hardie siding, rather than hard coat stucco or synthetic stucco. Hard coat stucco installation involves the following layers: a moisture barrier, wire lath (plaster base), a scratch coat, a brown coat and then a finish coat. The finished hard coat stucco itself should be about 5/8 to 3/4 of an inch thick. Synthetic stucco installation involves the following layers: 1 inch of foam on top of sheething, a thin layer of portment cement placed on top of fiberglass mesh, and then a finish coat. With synthetic stucco, the foam and sheeting used for the first coat hold moisture in, which leads to rot. Hard coat stucco mostly rots because of improper flashing or when the flashing is not “kicked out.”

Photo Credit: Lisa Turay / photoxpress

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