Anyone have any experience with cement waterproofing? any recommendations? I need it for a pre-exisiting porch....wood underneath, cement on top. I need a waterproofing that will not allow water to penetrate through to the wood, but can still be walked upon as it is a front porch. Thanks!
Sorry to say, but that porch is "toast". There is no simple product to that can be applied that will keep water out of the ceiling below for any length of time, as well as serve as a decent walking surface. The best long term plan is to tear-out the concrete, repair any damaged wood structure below, and re-pour the new concrete over a rubber roofing membrane that is installed correctly.