Because the board is made out of real wood any continuous moisture will cause it to warp over time. My suggestion to you would be that if you do purchase the steam generator remove the cover and pad from the board when you are done ironing/steaming and allow everything to air dry before using again.
You can also cover wood ironing board tops with continuous tin foil to prevent moisture contact with wood. Many steam ironing presses with solid or layered wooden boards are also covered with tin foil for the same reason.
I love my new board, Your service was very good. I received it shortly after I ordered it. Thank you very much.