Should I use Pressure Treated Wood for shower?

[sunnfun]

I am building a knee board in my shower/Steam shower covered with travertine marble. The wall will be approx. 3' X 3.5' high and I was planning on using PT wood. I will attach one end to my CB block wall and a tarazza floor with blue tapcons. I read somewhere not to use PT wood but to use another type of wood. The only reason I can think of would be because if the wood is not dry from the treatment it will might warp. Is this the case or is PT fine? Thank you.

[majakdragon]

sunnfun, Welcome to the DIY Forums.
I have never heard that before. Myself, if I was doing the work, I would use the PT as it is going to be in a moist environment. Good luck.

[sunnfun]

Majakdragon thanks for the reply and the welcome. I plan on using the PT wood.