If all or most of your glass is facing south your problem will be keeping moisture in the room not removing it. For what its worth, most framing grade PT lumber is warranted for something like 20(+/-) yrs on the ground, prop it on blocks an add yrs to it, maybe decade. The older ACC and the current ACQ lumber treatment, (our area) outside of ACQ eating all fasteners not SST, weighing much more than ACC and having a sort of waxy coating I never got any drippage out of them.
Whatever dripping you may see is probably more likely from rain or snow in your area and or from the area the mills and treatment plants are located. When we were building condos we had a lumber holding area within the development, we got tractor/trailers coming in directly from the mills up north, (usually Maine, Hampster and Canada) much of it frozen, still laden with snow and or rain in late March. Its been a long time since I read up on it, (80s) the problem with PT lumber is off gassing via heat within the 1st yr. On the ground it was something like 17% of the ACC could leach from the lumber into the soil within 2 yrs, so don't use it within enclosed areas or for vegetable gardens.
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