We have a concrete walkway that is falling apart and will be removed. It turns out the concrete is about 1" thick, and there is about 3" of sand or primarally sandy soil beneath the concrete, and tightly compacted Georgia clay under the sand. I'm having the sand and clay soils tested, but generally, will the sand likely have to be removed and replaced with topsoil (or amended?) if I place sod above it? Will sod root in mainly sandy soil? It's not 100% sand, but was obviously put in there to supply a bed for the concrete 60 years ago. I'm wavering between putting sod and stepping stones in the walkway or putting pebbles/gravel above the sand and putting stepping stones on that - but am worried that weeds etc...will be a bigger problem with pebbles/gravel than with sod.....

I have a poured 8" thick concrete foundation in basement that I need to replace an entry door. I would like to use a prehung door but the height of the entry is approx 81 3/4". The door I was looking at needs 81 3/4" so im guessing it will be tight. I dont want to special order a smaller door or get into cutting standard door down. What would be the easiest method to shave down that small amount from the concrete? I planned to install 2x buck on the sides for the door to attach to. Is there any issue not having 2x on top of the door? I never installed a prehung door before but I am assuming it doesnt get attached at the top anyway. Thank you.