I am a DIY'er, and am getting ready to put in a low retaining wall (max ht is 2'), approx 50' long. It will be butting up to a concrete pool deck. I have two questions, if anyone can help: 1) Do I need to put anything between the concrete retaining blocks and the poured concrete slab, or can they be butted up against each other? Question 2) For this height wall, do I need to run drain pipe in the gravel behind the retaining wall? I am using AB Block for the wall, no mortar to be used.
I appreciate any advice!