HDZ Performance Roof Replacement
This roof replacement in Lawrenceville, GA restored full protection to the home using GAF Timberline HDZ shingles in Charcoal. The project improved weather resistance, addressed underlying decking concerns, and delivered a durable, manufacturer-backed roofing system designed to perform under local climate conditions.
Project Overview
Following age-related wear and underlying decking concerns, the homeowner experienced declining roof performance that required a full system replacement. An inspection confirmed compromised decking, aging shingles, and vulnerable flashing areas that could no longer provide dependable protection. To ensure long-term performance and proper water management, a complete roof replacement was recommended, along with upgraded underlayment, flashing, and ventilation components.
Results
The new roofing system delivered immediate improvements in durability, weather resistance, and overall performance. GAF Timberline HDZ shingles provided enhanced wind resistance and consistent coverage, while new synthetic underlayment and StormGuard ice and water shield reinforced leak protection at valleys, penetrations, and critical transitions. Rotted decking was replaced as needed to restore structural integrity, and new flashing systems were installed at walls and roof intersections. Ventilation was upgraded with a Cobra ridge vent system to promote proper airflow and extend the lifespan of the roof. With installation completed to manufacturer standards, the homeowner now has a secure roofing system built to withstand future storms.
Materials Used
Roofing:
GAF Timberline HDZ shingles – Charcoal (33.30 squares)
GAF Seal-A-Ridge hip & ridge cap – Charcoal (6 bundles)
Underlayment & Protection:
GAF FeltBuster synthetic underlayment (3 rolls)
GAF StormGuard ice & water shield (2 rolls)
Starter & Edge Protection:
GAF Pro-Start starter shingles (4 bundles)
Drip edge – 10" x 5" x 2" white (eaves) (11 pcs)
Drip edge – 10" x 4" x 2" white (rakes) (22 pcs)
Ventilation & Accessories:
GAF Cobra III ridge vent (31 pcs)
3-in-1 pipe boots with rain collars – Black (3 boots)
Flashing & Metals:
Rolled flashing – 25' galvanized (24" wide) (1 roll)
Step flashing – 2" x 4" x 8" black (3 boxes)
Headwall flashing – 4" x 4" black (5 pcs)
Decking & Lumber:
1/2" OSB decking (15 boards)
Fasteners & Sealants:
Galvanized nail coils – 1-1/4" (2 boxes)
Stinger NailPac (2 packs)
NP1 sealant – Black (3 tubes)
Finishes:
Black spray paint (3 cans)