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Pressure treated wood is the most common type of wood used in the construction of any outdoor project. The process of pressure treating wood with a Micronized Copper Preservative (MCP) protects the wood against rot and insects; it does not protect the wood from the sun and rain.  Copper in the pressure treated wood acts as a fungicide.

Characteristics of the Micronized Copper Preservative 
Consumers have fallen in love with the lighter, more natural appearance of micronized copper treated products as well as their improved painting and staining capabilities. But YellaWood® brand products also boast improved corrosion characteristics and are approved for contact with aluminum*. In addition, they are long-lasting, durable, clean to the touch, have no objectionable odor, and provide protection from rot, fungal decay and termite attack. Outdoor exposure testing shows that products treated with micronized copper preservatives offer superior product benefits compared to other copper-based wood preservatives. 

YellaWood® brand products are available in Southern Yellow Pine and South American Pine species and are available treated for Above Ground, Above Ground General Use, Ground Contact and Fresh Water Immersion applications. The preservatives used in the MicroPro®
process are registered by the EPA as a non-restricted use pesticide and do not require Proposition 65 labeling in California. Products treated with micronized copper preservatives, such as YellaWood® brand products, as described in ESR-1980 and ESR-2240 are building code compliant. 

When it rains, the unprotected wood cells absorb water causing the cells to expand. When the deck dries, the wood's cells shrink. This continuous cycle of expansion and contraction ultimately causes cracking in the boards on your deck. Freeze and thaw cycles will also cause similar damage.

Constant exposure to the sun discolors the surface and accelerates wear by breaking down fibers in the wood. Throw in rain or snow and there's warping, rotting and cracking to contend with. Shade can spell trouble too, prolonging moisture's stay, which allows mold and mildew to turn the deck's surface a dingy gray or black.

Most wood products will look good for 2 or 3 years in our climate. During that time it will turn to a gray color and start to look dirty. Our advice is to have the deck protected as soon as it is built. If it was not protected when it was built, have it cleaned and protected now!


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