You require Denver concrete pros who engineer for freeze–thaw, UV, and hail. We require 4500–5000 psi, air‑entrained mixes (w/c ≤0.45), #4 rebar at 18 inches o.c., Class 6 bases compacted to 95% Proctor, and saw https://marleywlfg389480.blogoxo.com/38763176/denver-s-best-concrete-contractor