What's the difference between GAF Timberline HDZ and other Timberline shingles?

Timberline HDZ features GAF's LayerLock technology: a mechanical fusion process that bonds the shingle layers together for superior wind resistance (130 mph). The StrikeZone nailing area is also the industry's largest. HDZ also includes StainGuard Plus AR algae protection with a 25-year warranty, the longest in the industry.

How does GAF compare to Malarkey and CertainTeed?

GAF Timberline HDZ is the best-selling shingle in North America. Malarkey offers Scotchgard protection and Class 4 impact ratings across their line. Architectural shingle features SureNail technology. All three are excellent products. GAF's advantage is the Golden Pledge warranty with manufacturer-backed workmanship coverage and the LayerLock wind resistance technology.

Does a GAF roof qualify for insurance discounts?

GAF offers impact-resistant shingle options that carry Class 4 hail ratings, which can qualify for insurance premium discounts (typically 10-28% depending on carrier). The standard Timberline HDZ does not carry a Class 4 rating. Ask us about GAF's impact-resistant options if insurance savings are important to you.

What should I expect from professional GAF installation?

Professional installation means your GAF roof is completed by experienced crews who follow manufacturer specifications for material handling, installation techniques, underlayment, flashing, and ventilation. Proper technique and attention to detail are essential for optimal roof performance and longevity. SPG's installations are backed by manufacturer warranties and our quality commitment.

How long do GAF Timberline HDZ shingles last?

GAF Timberline HDZ carries a limited lifetime warranty and typically lasts 25-40 years with proper installation, ventilation, and maintenance. The actual lifespan depends on attic ventilation, installation quality, and local weather exposure. The Golden Pledge warranty provides 50 years of material defect coverage with no prorate period.

GAF Roofing Shingles Indianapolis

Timberline HDZ & Designer Shingles for Indianapolis Homes

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GAF Products AvailableTimberline HDZLayerLock TechnologyFree Estimates

SPG Roofing & Exteriors installs the full line of GAF roofing products. GAF is North America's largest roofing manufacturer, producing more shingles than any other company. Their Timberline HDZ line is the best-selling shingle in the country, known for its dimensional appearance, StrikeZone nailing area, and LayerLock technology that mechanically fuses shingle layers for superior wind resistance. SPG provides professional GAF installation with quality warranty coverage.

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We install systems and products from leading manufacturers.

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Systems We Install

GAF Timberline HDZ: America's Best-Selling Shingle

GAF Timberline HDZ is the most installed shingle in North America, and for good reason. The HDZ line combines a dimensional architectural appearance with GAF's LayerLock technology: a patented mechanical fusion process that bonds the two shingle layers together more effectively than standard adhesive methods. This results in wind resistance that 99.9% of shingles tested achieve at the 130 mph level.

Available in a comprehensive color palette including Driftwood, Weathered Wood, Charcoal, Shakewood, and Pewter Gray, Timberline HDZ complements any Indiana home style. The wide color range and consistent availability make it easy to match or coordinate with existing exteriors. StainGuard Plus AR algae protection keeps the roof looking clean for 25 years, backed by the industry's longest algae resistance warranty.

GAF Timberline HDZ Driftwood shingle installation on Greensburg, IN home

GAF Lifetime Roofing System

GAF's strength is in their complete roofing system approach. Rather than just shingles, GAF offers matched components: Deck-Armor premium breathable underlayment, WeatherWatch leak barrier at eaves and valleys, Cobra ventilation products, and TimberTex hip and ridge cap shingles. When installed as a complete system by a professional contractor, these components work together for optimal performance.

Installing the full GAF Lifetime Roofing System provides comprehensive warranty protection. This includes material coverage with no prorate period, workmanship coverage, and wind speed warranty protection. Proper installation following GAF specifications is essential for full warranty activation.

GAF Timberline HDZ roofing system: front gable view in Greensburg, IN

Professional GAF Installation Quality

SPG brings professional installation standards to every GAF roofing project. We follow manufacturer specifications for proper material handling, installation techniques, underlayment, flashing, and ventilation. Our commitment to quality installation ensures your GAF roof performs optimally and provides reliable protection.

For homeowners, professional installation means your roof is completed by experienced crews who understand the critical details that impact longevity. Proper technique, attention to valleys and penetrations, and correct flashing are essential for any roofing system to perform as designed. SPG's installations are backed by manufacturer warranties and our quality commitment.

GAF Timberline HDZ Driftwood: rear exterior view in Greensburg, IN

Why Choose SPG

Key Benefits

LayerLock Technology

GAF's mechanical fusion process locks the shingle layers together, providing 99.9% of shingles in the nail zone reaching 130 mph wind rating

StrikeZone Nailing Area

The industry's largest engineered nailing zone makes proper nail placement straightforward, improving installation consistency and wind performance

StainGuard Plus AR Protection

Time-release copper-infused granules prevent blue-green algae staining for 25 years: the longest algae protection warranty in the industry

DuraGrip Adhesive Sealant

Factory-applied adhesive activates with sun exposure to create a strong bond between shingle courses, enhancing wind uplift resistance across the entire roof

Golden Pledge Warranty

GAF Lifetime Roofing System includes comprehensive material and workmanship coverage backed by GAF when installed properly

Professional GAF Installation

SPG provides professional installation of the full line of GAF roofing products with commitment to quality craftsmanship

Our Process

How It Works

From first call to final walkthrough: here's what to expect.

Free Roof Inspection

We assess your current roof condition, measure all dimensions, and document any existing damage. Our inspection includes attic ventilation evaluation and photo documentation.

Product Selection & Estimate

We present GAF Timberline HDZ and designer shingle options with color samples, explain the Lifetime Roofing System components, and provide a detailed written estimate.

Professional GAF Installation

Our crews install the complete Lifetime Roofing System (leak barrier, underlayment, ventilation, shingles, and ridge caps) per GAF specifications.

Golden Pledge Warranty Registration

We register your GAF Golden Pledge limited warranty, conduct a final quality inspection, clean the property, and provide all documentation including your 25-year workmanship coverage.

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What Our Customers Say

Derek M.

“First time doing business with SPG. Worked with Jeremy Hilton over several weeks, and he was very attentive – persistent without being obnoxious, always quick to respond. After nailing down the product details and price for a roof and gutter replacement job, everything went smoothly. I spotted several workers taking additional time on smaller details that most miss, so I’m happy to leave a glowing review. Crews looked great and arrived and departed exactly when SPG predicted and cleaned up well.”

Tonya T.

“I recently moved into my Franklin home and have contracted several companies for home improvements. Due to the tornadoes in the area in late March, I had roof damage and needed quick assessment to avoid more interior damage. I called Grady Phillips at SPG as they did the roof replacement on my previous home. By that afternoon, my roof was tarped to prevent more damage. Grady and the team worked with my insurance company to get me coverage for a complete roof replacement. They completed the project within a few weeks. Jordan, the on-site manager, answered all my questions and kept me fully informed. The construction team was respectful and quick. I am very happy with the whole process and my new roof. They have been the best home repair company that I have worked with this year.”

Tonya M.

“We had hail damage to our home and detached garage and SPG were prompt with providing an estimate, very friendly and helpful with our questions, and provided exceptional service. They worked with our insurance company (not an easy task) and were in constant communication with us. Their roofing and siding crews worked very hard and cleaned up after the job was complete. I would strongly recommend you contact SPG for your next job. Dustin and AJ will take great care of you and your home through the entire process!”