Dunwoody Roof Replacement – GAF Timberline HDZ

This roof replacement in Dunwoody, GA restored full protection to the home using GAF Timberline HDZ shingles in Weathered Wood. The project improved curb appeal, increased weather resistance, and ensured the homeowner received a durable, manufacturer-backed roofing system built for local climate conditions.

Project Overview

Following storm exposure and age-related wear, the homeowner noticed declining roof performance, including compromised shingles, vulnerable flashing areas, and ventilation concerns. An inspection confirmed the need for a full roof replacement, along with upgraded leak protection and ventilation improvements. The home’s aging roof system no longer provided dependable defense against Dunwoody’s frequent rain and seasonal storms, prompting the need for a durable and long-lasting solution.

Results

The new roofing system delivered immediate improvements in protection, appearance, and overall performance. GAF Timberline HDZ shingles provided enhanced wind resistance, consistent coverage, and reliable long-term durability. Additional leak barriers were installed at valleys, penetrations, chimneys, and skylights, while low-slope areas were reinforced using a Liberty rolled roofing system with matching cap sheet for a seamless finish. Ventilation was upgraded by removing the existing power fan, installing a full-length ridge vent system, and adding box vents for proper exhaust. The project also included installing two new Velux FS M08 skylights and completing interior sheetrock and paint work around the openings. With installation completed to manufacturer standards, the homeowner now has a secure roofing system built to perform through future storms.

Materials Used

Roofing:

GAF Timberline HDZ shingles – Weathered Wood

GAF Seal-A-Ridge hip & ridge cap – Weathered Wood

Underlayment & Protection:

Tri-Built synthetic underlayment (4 rolls)

GAF StormGuard ice & water shield (5 rolls)

Low-Slope Roofing System:

Liberty Cap Sheet – Weathered Wood (3 rolls)

MA base sheet – 2 sq roll (2 rolls)

SA base sheet – 2 sq roll (2 rolls)

Starter & Edge Protection:

Tri-Built starter shingles (4 bundles)

Drip edge – 10" x 5" x 2" brown (eaves) (19 pcs)

Drip edge – 10" x 4" x 2" brown (rakes) (19 pcs)

Ventilation & Accessories:

GAF Cobra III ridge vent (24 pcs)

Lomanco 750 Slantback box vents – Black (3 vents)

3-in-1 pipe boots with rain collars – Black (6 boots)

Electrical box (to close power fan) (1 box)

HVAC cap, collar, and flashing kits (2 kits; measure/order on-site)

Flashing & Metals:

Rolled flashing – 25' galvanized (24" wide) (1 roll)

Step flashing – galvanized 2" x 4" x 8" (2 boxes)

Headwall flashing – 4" x 4" brown (1 pc)

Counter flashing – 8" black (4 pcs)

Decking & Lumber:

1/2" CDX plywood (20 boards)

2" x 4" boards – 12' (1 bundle)

Fasteners & Sealants:

Simplex nails – 1 1/4" (5 lbs)

Galvanized nail coils – 1 1/4" (2 boxes)

Stinger NailPac (2 boxes)

NP1 sealant – Black (6 tubes)

Ultra Karnack 19 roofing sealant (6 tubes)

Skylights:

Velux FS M08 skylights w/ room darkening white solar blind (2)

Velux EDL M08 flashing kits (2)

Velux FCM 3030 skylight w/ room darkening white solar blind (1)

Velux ECL 3030 flashing kit (1)

White primer paint for skylight curb (1 can)

Finishes:

Black spray paint (3 cans)

Siding/Exterior:

Hardie siding – 8.25" beaded smooth (4 pcs)