Roof replacement means stripping the old roofing material down to the decking (or in some cases layering over it, depending on local code and the condition underneath), repairing any rotten or water-damaged wood, installing new underlayment and flashing, and putting down a new roof covering, most often asphalt shingles in McDonough but also metal, tile, or flat membrane systems on some homes and commercial buildings. It's a bigger job than a repair: it usually takes one to three days for a typical house, involves a dumpster or trailer for tear-off debris, and requires permits through Henry County or the City of McDonough depending on where the property sits.
We track 38 roofing companies serving McDonough that handle replacement work. Before hiring, ask to see proof of general liability and workers' comp insurance, confirm whether the crew is the contractor's own employees or a subcontracted crew, and get the manufacturer certification level if you want a stronger warranty (many shingle makers require certified installers to back their longer warranties). A written estimate should break out tear-off, decking repair if needed, underlayment, flashing, and disposal separately, not just a lump sum.
Our scoring weighs licensing and insurance verification, how consistently a company shows up in customer feedback over time, response speed, and whether pricing and scope are communicated clearly before work starts. You can see the full breakdown on our methodology page, and the ranked list of local roofers is on our best roofing contractors in McDonough guide.
