hi, so after about 6 years out deck surface is starting to chip. i don't know what the stuff is called but it's in a few layers ending with a plaster like material that is colored and stamped. anyway, there was a few thin spots that started cracking and water got in and it started releasing from the concrete/mesh. not all of it is coming up but i've chipped away everything that is.
now what we're planning on doing is finishing in Trex or something similar but we want to seal the surface before we go any further. my dad had the idea of tar sealing the entire deck because its flexable and water tight. what do you think about that? they also used OSB instead of ply and there is some minor water damage so we'll have to replace that first but then we want to make sure water will never get in again.
thank you for any advice.