A full roof replacement means stripping the old roofing material down to the deck, repairing or replacing damaged decking, installing new underlayment and flashing, and laying new shingles, tile, or metal. It's a different job from a repair or a re-roof over existing layers, and in Johns Creek it's usually driven by one of three things: a roof past its expected lifespan (roughly 20-25 years for asphalt shingles), storm or hail damage an insurance adjuster has signed off on, or a sale that requires a roof in good condition. The job typically runs one to three days for an average single-family home, weather permitting.
Because the work is expensive and hard to inspect once it's done, the contractor you pick matters more here than in almost any other home project. Before signing anything, a buyer should check for a permanent local address (not just a P.O. box), current general liability and workers' comp insurance, manufacturer certifications if you want a better shingle warranty, and a written estimate that spells out tear-off, decking repair costs, underlayment type, and cleanup. Ask how they handle magnet sweeps for nails and whether the warranty covers labor as well as materials, not just the shingles.
We evaluate the 5 roof replacement businesses we've found in Johns Creek on the same criteria across licensing, insurance, review patterns, responsiveness, and years of verifiable local work, and lay out the full breakdown in our methodology. For the ranked list with scores and side-by-side detail, see our best roofing contractors in Johns Creek guide.
