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Old 09-21-2017, 06:25 PM   #10
sdowney717
Guru
 
City: Seaford Va on Poquoson River, VA
Country: United States
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 2,136
I bought the 3/4 plywood from Treated lumber outlet, and is nice looking and dry and flat. It is rated for ground contact UC4A. Price was $35.

Some of the new treatments are rated for ground contact.
http://www.deckmagazine.com/design-c...-wood-update_o

Treated Lumber outlet, all is ground contact using UC4A micronized copper azole.

Lowes has both ground and non ground contact treated woods.
The structural wood I used from Lowes is EL2 treated and it stabilizes the wood so less likely to warp.
http://treatedwood.com/uploads/Ecolife.pdf
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