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Old 07-08-2015, 07:10 AM   #1
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Retaining Wall & Pressure Treated Wood ???

The Existing Retaining Wall in the Ditch has seen better days we have a Southerly Exposure so through time the Sun has beat down on the wood which is now starting to dry out splitting along the top, it sits on top of a culvert pipe at it's lowest point.. The original R/W was built using 8X8 Timbers and supported by steel fence posts which were sunk in the ground 5ft. Well below the Frost Line.. Yes the R/W does have a slight lean to it but there is a steel fence post every 2ft. The Fence stretches 12ft. and is 4 1/2ft. At it's lowest point.. My Quest is to replace the R/W with that new Micro Pro Sienna wood.. Thoughts & Ideas Appreciated..
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Old 07-08-2015, 09:23 AM   #2
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Ayuh,..... Pictures,..??..??

Maybe a link to the product you want to use,..??
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Old 07-08-2015, 09:57 AM   #3
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Modified copper
One such solution, and by far the front runner, is MicroPro developed by Osmose Corp. MicroPro uses as much copper as ACQ but uses it quite differently. Rather than dissolving copper into a solvent based solution as with ACQ wood, they grind the copper to a microscopic fineness that is small enough to actually pass through the pores of the walls of the wood cells when under pressure. This deposits the copper inside a cell, not on the surface. Once cured, there is no water flow or pressure moving from inside the cell outward, so the copper never moves again.
That solved both the leaching problem and kept the copper away from contact with fasteners, brackets and metal trim. No more accelerated corrosion of fasteners, although it is always good to use the best of rust resistant fasteners outdoors, the wood is no longer contributing to the corrosion.
Accelerating aging tests have it outperforming ACQ. Using water rather than solvents solved the VOC problems. In addition the water based process allows for more effective colour treatment, meaning that a light cedar or reddish brown can be given to a mixed variety of Canadian wood species, as typically come in any construction lumber batch, meaning that the deck has a evenly uniform colour.
So today we actually have a NAHB Green Approved pressure treated wood: you read that right, a Canadian building code compliant pressure treated wood that is considered a Green product.

It looks to be the new future for PT wood.
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