GAF Camelot Architectural Shingle Roof Replacement and New Plywood Decking in South Amboy, NJ
GAF Camelot roof replacement in South Amboy, NJ included new plywood decking, synthetic underlayment, membrane waterproofing on a low-slope section, rebuilt valleys, and new flashing across a large multi-section residential roof.
This fall 2026 project involved a large single-family home in South Amboy, Middlesex County. The roof had numerous hips, ridges, valleys, dormers, chimneys, and intersecting sections, along with a separate low-slope area. Because the existing shingles and portions of the original roof deck had deteriorated, the replacement required several installation stages and extensive coordination around the complex roof geometry and mature trees.
Roof problems found in South Amboy
The existing shingles had reached replacement condition, and the tear-off exposed compromised plywood and areas affected by water intrusion. The highest-risk details included valleys, roof intersections, dormers, chimney transitions, wall-to-roof joints, and penetrations. The inspection confirmed that replacing the complete roofing system—including deteriorated decking and waterproofing details—was the appropriate solution.
Full roof replacement and plywood decking work
The crew removed the old roofing materials and opened large sections down to the framing so the roof deck could be evaluated. Unsuitable decking was removed and replaced with new exterior-grade plywood before the new weatherproofing and shingle layers were installed. The project included:
- Removing the existing shingles and deteriorated roofing materials.
- Removing compromised roof decking and installing new plywood sheathing.
- Installing synthetic underlayment and ice-and-water protection at critical roof areas.
- Applying a membrane roofing system to the low-slope section.
- Installing GAF Camelot architectural asphalt shingles in a gray and charcoal blend.
- Rebuilding and waterproofing valleys, hips, ridges, dormers, and roof intersections.
- Installing new ridge-cap and hip-cap shingles with starter materials and roofing fasteners.
- Integrating chimney flashing and waterproofing wall-to-roof transitions.
- Flashing and sealing roof penetrations and other vulnerable details.
GAF Camelot shingles and membrane roofing
The main pitched roof received GAF Camelot architectural shingles with a gray and charcoal dimensional appearance. These shingles were installed over the new plywood substrate and synthetic underlayment, with carefully finished courses across the many connected roof planes. The separate low-slope section received membrane waterproofing suited to its lower pitch and transition into the shingle roof areas.
Complex roof geometry and installation challenge
This roof required detailed layout and flashing coordination because of its multiple intersecting slopes, dormers, valleys, chimneys, and roof-to-wall transitions. Mature trees and limited staging space added to the logistics. The work was completed over several days, with exposed areas protected while decking, underlayment, membrane, flashing, and shingles were installed in sequence.
Project result
The deteriorated roof system was replaced with a complete weather-protected assembly. Damaged decking was upgraded with new plywood, the low-slope section was waterproofed with membrane roofing, and the main roof received a new GAF Camelot architectural shingle system. Rebuilt valleys, clean ridge and hip caps, chimney flashing, dormer details, and sealed penetrations completed the installation.
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South Amboy GAF Camelot roof replacement FAQs
Why was a complete roof replacement necessary?
The existing shingles were aged and deteriorated, and the tear-off exposed compromised plywood and water-intrusion risks beneath the old roof. A complete replacement addressed the roof covering, decking, underlayment, flashing, and waterproofing details together.
Was new plywood roof decking installed?
Yes. Large sections were stripped down to the framing, unsuitable decking was removed, and new exterior-grade plywood sheathing was installed before the new roofing layers were applied.
What shingles were installed?
The main pitched roof received GAF Camelot architectural asphalt shingles in a gray and charcoal blend, with starter shingles and matching ridge and hip caps.
What happened to the low-slope roof section?
The low-slope section received a membrane roofing system. This provided a waterproof transition where a lower-pitch roof area connected with the main shingle roof sections.
How were the valleys and roof intersections handled?
Valleys and intersections were rebuilt and waterproofed with compatible underlayment, ice-and-water protection, flashing, and shingle details. The many connected roof planes required careful layout so water could move safely through the roof system.
How was the chimney protected?
Chimney flashing was integrated into the new roof system, and the surrounding transitions were waterproofed before the adjacent architectural shingles were completed.
How were dormers and penetrations waterproofed?
Dormer and wall-to-roof transitions were detailed with compatible flashing and waterproofing materials. Roof penetrations were also flashed and sealed as part of the replacement.
Was this an emergency repair?
No. This was a scheduled full roof replacement completed over several days because of the size and complex layout of the home.
Can a roof inspection identify deteriorated decking?
A professional roof inspection can identify signs of aging and water-intrusion risk. When the roof is opened during a roof replacement, deteriorated decking can be confirmed and replaced before the new shingle system is installed.
Done Rite Roof Repair – Exteriors provides roof replacement, GAF shingle installation, plywood roof-deck replacement, membrane waterproofing, and related roofing services in South Amboy and throughout Middlesex County, New Jersey.