Replacing a roof in Reston
Hail shows up often in the Fairfax County record. NOAA logged 39 hail reports there, with stones as large as 1.75 inches, which makes impact-rated shingles a fair option to raise when you plan a re-roof in Reston.
Plan for replacement rather than patching when the problems are spread out. Granule loss across the field of the roof, shingles that have lost their seal, recurring leaks around penetrations, a second layer, or decking that has started to rot are all reasons to strip the roof and start fresh. Age alone can be enough once the covering has passed its expected life.
Detached houses account for about 20 percent of Reston's housing units. If your home is attached, work out with the neighbors which parts of the roof are yours.
Fairfax County generally exempts shingle-only work on a one- or two-unit house from the building permit requirement. That can change if the job grows into structural work or decking beyond 256 sq ft of plywood, which goes through Fairfax County Land Development Services. Ask the contractor who would handle that filing. Also go over the material choice, the schedule, the manufacturer's warranty, and the tear-off and disposal plan.