That was my thinking as well. The pressure treated wood is treated through the entire piece to resist rot so it should not be an issue.

I didn't really know that they switched from CCA to a new form of treatment. either way, it is made to be buried in the ground with constant moisture and won't rot. It does like to warp though, so get pieces that dried out if you can.

there is a number of things you can do, as mentioned above. keep in mind wood doesn't rot from getting wet and drying out, wood rots from getting wet and staying wet. I thought i read on here as to where someone used something similar to trex 1x6 and then put the carpet over it, using stainless staples it should pierce the fiber in the board.

Alsoif you buy treated planking, once you cut it, look at the end grain and you will see how far the treating penetrated by the coloring..

My 89 trailer still has the original wood bunks and are far from rotting, the rest of the trailer is a different story. Cant tell but they might not even be treated.

HERE WE ARE TALKING ABOUT WOOD AND RIGHT BELOW THE BLOG IS A TERMINIX AD! I GUESS THAT MEANS THERE TELLING I'M GETTING TERMITES IN MY NEW BUNKS I AM PUTTING TOGETHERE!