Check local building codes, permit requirements, and weather conditions
Inspect the roof deck for damage, rot, and loose fasteners
Remove old shingles, underlayment, flashing, and debris if reroofing
Repair or replace damaged decking
Install drip edge along eaves and rakes
Apply ice and water shield in valleys, eaves, and other required areas
Install roofing felt or synthetic underlayment over the roof deck
Snap chalk lines to keep shingle courses straight
Install starter shingles along the eaves and rakes
Begin shingle rows at the bottom edge of the roof
Nail shingles according to manufacturer instructions
Stagger shingle joints from row to row
Install shingles around vents, chimneys, and other roof penetrations
Install flashing where needed at valleys, walls, and penetrations
Continue installing shingles up to the ridge
Install ridge cap shingles along the peak
Seal exposed nails and any required edges
Inspect the roof for alignment, gaps, and proper fastening
Clean up debris and remove leftover materials safely