How do I know if I need a new roof or siding?

Common signs include missing or curling shingles, leaks, mold, cracked siding, or visibly aged materials.

How long does a roof or siding replacement take?

In our experience, most of our residential roofer jobs are completed in 1-3 days, while siding projects typically take 3-7 days, depending on the size and complexity of the home.

What types of roofing materials do you use?

We work with a wide range of materials, including asphalt shingles, metal roofing, cedar shake, and flat roofing systems like TPO and EPDM.

GAF Certified Plus Installer · Northern Virginia, DC & Maryland

GAF Roofing Products Installed by a Certified Northern Virginia Contractor

American Group Construction installs the full line of GAF roofing products. Certified Plus status. Silver Pledge warranty available. Free estimates throughout Northern Virginia.

GAF Certified Plus™

Residential Roofing Contractor

Silver Pledge™ Warranty

Materials + workmanship covered

WindProven™ Eligible

No maximum wind speed restriction

Lifetime† Coverage

50-year non-prorated period

#1

Best-selling shingle brand in North America

130+

Years in business

No limit

Wind speed coverage with WindProven™

Why GAF

The Largest Roofing Manufacturer in North America

GAF is North America’s #1 roofing manufacturer, with over 130 years in business. Their shingles are engineered for the mid-Atlantic’s freeze-thaw cycles, summer heat, and severe storm season — and their warranty program is among the most comprehensive in the industry.

When American Group Construction installs GAF products as a complete certified system, eligible projects qualify for the Silver Pledge Limited Warranty: Lifetime† coverage on materials, 50-year non-prorated protection, WindProven™ wind coverage, and workmanship backing that uncertified contractors cannot offer.

Our Certification

GAF Certified Plus Status

Most contractors can buy GAF shingles. Fewer earn Certified Plus status. The difference is warranty access — Certified Plus is required to offer the Silver Pledge warranty, which covers manufacturing defects, misapplication, and wind damage.

American Group Construction has met GAF’s requirements for installation training and workmanship standards.

GAF Certified Plus™

Residential Roofing Contractor

Silver Pledge™ Warranty

Materials + workmanship covered

WindProven™ Eligible

No maximum wind speed restriction

Lifetime† Coverage

50-year non-prorated period

Products We Install

GAF Shingle Lines Installed by American Group Construction

Timberline HDZ® — High Definition Lifetime† Shingles

The #1-selling shingle in North America. LayerLock® Technology mechanically fuses overlapping shingle layers during installation. The StrikeZone® nailing area paired with Dura Grip™ sealant creates an asphalt-to-asphalt bond engineered for exceptional wind-uplift resistance.

Lifetime† warranty 50-yr non-prorated WindProven™ eligible Class 3 impact rating 25-yr algae protection

Timberline HDZ® Spec Sheet

Download product specifications

Timberline UHDZ® — Ultra High Definition Lifetime† Shingles

The premium step up from HDZ. The patented Dual Shadow Line creates more pronounced dimensional depth. UltraMat™ high-performance fiberglass mat achieves a UL2218 Class 4 impact resistance rating — the highest available — and may qualify for insurance discounts.

Lifetime† warranty 50-yr non-prorated WindProven™ eligible Class 4 impact rating 30-yr algae protection

Timberline UHDZ® Spec Sheet

Download product specifications

Color Options

Available Shingle Colors

American Group Construction installs GAF shingles in the full range of available colors. Always review physical samples before making your final selection — digital and printed representations do not accurately reflect the actual shingle blends.

Timberline HDZ® — High Definition (19 colors)

Charcoal Barkwood Driftwood Pewter Gray Slate Shakewood Weathered Wood Golden Amber Hunter Green Hickory Fox Hollow Gray Copper Canyon Mission Brown Oyster Gray Patriot Red Biscayne Blue Birchwood Sunset Brick Williamsburg Slate

Timberline HDZ® — Bold Definition (4 colors)

Midnight Mesa Cliffside Chestnut Valley Sierra Sand

Timberline UHDZ® — Available Colors (8 colors)

Charcoal Barkwood Pewter Gray Slate Shakewood Weathered Wood Appalachian Sky Golden Harvest

Want to see samples in person?

We bring physical shingle samples to your free inspection so you can see the actual colors before committing.

GAF Lifetime† Roofing System

Install any GAF Lifetime† shingle + any 3 qualifying accessories = Lifetime† system warranty

Each component plays a specific role in protecting the home and qualifying the installation for the highest available warranty tier.

Ridge Cap Shingles
Roof Deck Protection
Attic Ventilation

Starter Strip Shingles
Leak Barrier
Lifetime† Shingles

Silver Pledge™ Limited Warranty

Download full warranty document

Complete System

Beyond the Shingle — The GAF Lifetime† Roofing System

A properly warranted GAF roof is a system, not just shingles. Install any GAF Lifetime† shingle with any 3 qualifying GAF accessories and the entire system qualifies for a Lifetime† Limited Warranty — plus non-prorated coverage for the first 10 years on qualifying products.

American Group Construction installs all six system components, making every eligible project fully warranty-qualified from day one.

Roof Deck Protection:

Secondary moisture barrier against wind-driven rain, ice dams, and infiltration.

WeatherWatch® / StormGuard® Leak Barrier

Ice and water barriers at eaves, valleys, dormers, and chimneys. Required for WindProven™ eligibility.

Starter Strip Shingles

Installed at eaves and rakes. Required for maximum wind coverage under the Silver Pledge warranty.

Ridge Cap Shingles

TimberTex®, Seal-A-Ridge®, or TimberCrest® at hips and ridges. Required for WindProven™ qualification.

Cobra® Attic Ventilation

Reduces heat and moisture buildup. Extends shingle life. Fourth required component for WindProven™ eligibility.

Lifetime† Shingles

Timberline HDZ® or UHDZ® — the anchor of the complete system.

Warranty Coverage

What the GAF Silver Pledge™ Warranty Covers

American Group Construction’s Certified Plus status makes your project eligible for the Silver Pledge Limited Warranty — covering materials, workmanship, and wind. Questions about what’s covered? Call us before you sign anything.

Lifetime† Manufacturing Defect Coverage

Timberline LayerLock® shingles carry a Lifetime† warranty on defects, with a 50-year non-prorated Smart Choice® Protection Period.

WindProven™ — No Maximum Wind Speed

When installed with 4 qualifying GAF accessories, there is no wind speed above which coverage ends. No storm clause. No registration fee.

Algae Protection

StainGuard Plus PRO™ (30 years, UHDZ) and StainGuard Plus™ (25 years, HDZ) against blue-green algae discoloration.

Misapplication Coverage

Covers application errors in GAF products and covered flashings discoverable within the first two years of installation.

Transferable Warranty

Transfers once to a second owner. If within the first 20 years, the second owner receives equivalent coverage to the original.

Smart Choice® Protection Period

During the first 50 years, coverage is fully non-prorated. After year 50, GAF's contribution is 20% of replacement cost.

Silver Pledge™ Limited Warranty

Download full warranty document

WindProven™ Wind Warranty

Download warranty details

GAF Certified Plus Warranty Comparison Chart

Interactive embedded widget — no link to gaf.com

Service Area

Serving Homeowners Across Northern Virginia

American Group Construction installs GAF roofing products throughout the Northern Virginia region, including:

Nokesville and Prince William County
Woodbridge and Dumfries
Warrenton and Fauquier County
Fairfax County and surrounding areas

Manassas and Manassas Parky
Gainesville, Haymarket, and Bristown
Alexandria and Arlington
Washington DC and Maryland

Frequently Asked Questions

Is American Group Construction a GAF Certified Plus contractor?

Yes. American Group Construction holds GAF Certified Plus status as a residential roofing contractor. This certification is required to offer the Silver Pledge warranty, which covers materials, misapplication, and wind.

What is the difference between Timberline HDZ and Timberline UHDZ shingles?

Both use LayerLock® Technology and carry Lifetime† coverage. UHDZ adds the Dual Shadow Line for greater visual depth, achieves a Class 4 (vs. Class 3) impact resistance rating via UltraMat™ mat technology, and carries a 30-year StainGuard Plus PRO™ algae warranty vs. 25 years on HDZ.

What is the WindProven™ warranty and how do I qualify?

WindProven™ is GAF’s industry-first wind warranty with no maximum wind speed limit. It requires LayerLock®-labeled shingles installed with 4 nails per shingle, plus four qualifying GAF accessories: starter strip shingles, roof deck protection, ridge cap shingles, and either a leak barrier product or attic ventilation product.

Does the GAF warranty transfer to a new homeowner?

Yes, once. If the transfer occurs within the first 20 years, the second owner receives equivalent coverage. After 20 years, coverage reduces to a two-year period. The new owner must notify GAF in writing within one year of the property transfer.

How long do GAF shingles last on a Northern Virginia home?

Timberline HDZ and UHDZ carry Lifetime† warranties on materials. In Northern Virginia’s climate, a properly installed and ventilated GAF system typically performs well for 25 to 40 years.

What is not covered by the GAF Silver Pledge warranty?

Exclusions include hail damage, winds above the applicable limit unless WindProven™ qualified, impact from foreign objects, inadequate ventilation, ice damming outside the leak barrier area, and damage caused by non-GAF products such as metal work or counterflashing.