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.

Licensed & Insured · Northern Virginia, DC & Maryland · Since 2010

Roof Replacement in Northern Virginia

American Group Construction has replaced roofs on more than 10,000 homes and properties since 2010. Every replacement comes with up to a 25-year workmanship warranty and GAF manufacturer coverage.

Up to 25-Year Workmanship Warranty

Backed by AGC directly

GAF Certified Plus™ Installer

Silver Pledge warranty eligible

Licensed, Bonded & Insured

BBB accredited · A+ rating

Financing Available

For qualified homeowners

10,000+

Projects completed since 2010

25 yr

Workmanship warranty

14+

Years experience, owner-led

A+

BBB accredited rating

When to Replace

Signs Your Roof Needs to Be Replaced

Most asphalt shingle roofs in Northern Virginia last 20 to 30 years. Hot humid summers, heavy thunderstorms, and winter freeze-thaw cycles all accelerate wear. These are the signs that replacement — not another repair — is the right call.

⚠ Shingles cracking, curling, or missing in multiple areas

⚠ Granule loss in gutters, downspouts, or on the ground

⚠ Roof is 20+ years old, especially if original installation

⚠ Recurring leaks that prior repairs haven’t resolved

⚠ Sagging or soft spots indicating deck damage or rot

⚠ Storm damage affecting a large portion of the roof

Not Sure?

Get an Honest Answer First

American Group Construction provides free roof inspections throughout Northern Virginia. Isai Fonseca personally oversees assessments and gives you an honest recommendation — including telling you when a repair is the better answer.

We don’t recommend replacements to generate larger jobs. Our reputation was built one honest inspection at a time.

Free inspection covers:

Shingles · Flashing · Decking · Ventilation · Gutters · Photo documentation · Written estimate

Timeline

How Long Does Roof Replacement Take?

Most residential roof replacements by American Group Construction are completed in a single day. A standard single-family home with an asphalt shingle system typically runs one day from tear-off through cleanup.

Larger homes, steep or complex roof structures, or significant deck damage may require two days. A realistic timeline is included in every written estimate before work begins.

Factors that affect timeline:

Roof size · Pitch and complexity · Deck damage extent · Weather conditions

Investment

What Does Roof Replacement Cost in Northern Virginia?

A typical residential asphalt shingle roof replacement in Northern Virginia ranges from $8,000 to $20,000 or more depending on home size, roof pitch, material selection, and deck condition.

American Group Construction provides free, detailed written estimates so homeowners know the full cost before work begins. If hidden deck damage is found during tear-off, it is reviewed and approved before additional work proceeds.

Primary cost factors:

Roof size in squares · Shingle product · Pitch · Deck condition · Complexity

Warranty Coverage

What's Covered When American Group Construction Replaces Your Roof

Every roof replacement by American Group Construction comes with two layers of warranty protection — covering both the installation and the materials. Together they provide among the most comprehensive warranty coverage available from a Northern Virginia roofing contractor.

Combined Warranty Coverage

Up to 25-Year Workmanship Warranty + GAF Lifetime† Manufacturer Warranty

Two separate warranties. One protects the installation. One protects the materials. Both included on every qualifying replacement.

AGC Workmanship Warranty

Up to 25 Years — Backed by American Group Construction

Covers defects in installation — flashing, sealing, fastening, and all workmanship
If a problem develops because of how the roof was installed, AGC stands behind it
Most contractors offer 1 to 5 years — a 25-year commitment reflects confidence in every installation
Submit warranty service requests directly through American Group Construction

GAF Silver Pledge™ — Manufacturer Warranty

Lifetime† Coverage on Materials

Lifetime† limited warranty on manufacturing defects — 50-year non-prorated period
WindProven™ — no maximum wind speed restriction when installed as a complete GAF system
25-year algae protection (HDZ) or 30-year algae protection (UHDZ)
Covers misapplication errors discoverable within first two years
Transferable once to a second owner within first 20 years at full coverage

Why both warranties matter: A manufacturer warranty covers the materials. A workmanship warranty covers the installation. Both are necessary for complete protection — and the workmanship warranty is only as good as the contractor standing behind it. When a contractor offers up to 25 years on workmanship alongside a Lifetime† GAF manufacturer warranty, the homeowner is covered from every angle.

Our Process

What to Expect During a Roof Replacement

Free Roof Inspection

Shingles, flashing, fascia, soffit, gutters, and decking assessed with photos. Honest recommendation — repair or replacement — before anything is sold.

Written Estimate

Full materials, labor, and timeline with no vague line items. Hidden damage found during tear-off is discussed and approved before any additional work proceeds.

Material Selection

Choose from GAF Timberline HDZ® (23 colors) or UHDZ® (8 colors, Class 4 impact). Physical samples brought to the inspection for accurate color review.

Tear-Off and Deck Inspection

Full removal of existing system. Deck inspected for damage. Compromised sections replaced before installation — required for full warranty qualification.

Full System Installation

Deck protection, leak barriers, starter strips, field shingles, ridge cap, and ridge vent — all installed to manufacturer spec for complete warranty qualification.

Cleanup and Walkthrough

Magnetic rollers and manual cleanup remove all nails and debris. Final walkthrough before the crew leaves.

Financing

Flexible Financing for Roof Replacement

A full roof replacement is a significant investment. American Group Construction offers flexible financing options for qualified homeowners so you can move forward with quality materials and full warranty coverage without delaying the project.

Financing available throughout Northern Virginia, DC, and Maryland

Contact American Group Construction to discuss options and eligibility for your specific project.

Materials We Install

GAF Roofing Systems — Installed by a Certified Plus Contractor

American Group Construction installs GAF roofing systems as a GAF Certified Plus installer — the certification level required to offer the Silver Pledge warranty.

Timberline HDZ® — High Definition Lifetime† Shingles

The #1-selling shingle in North America. 23 color options. LayerLock® Technology for exceptional wind-uplift resistance

Lifetime† warranty WindProven™ eligible Class 3 impact 25-yr algae protection

Timberline UHDZ® — Ultra High Definition Lifetime† Shingles

Premium option. Dual Shadow Line. UltraMat™ Class 4 impact resistance. 8 color options. May qualify for insurance discounts.

Lifetime† warranty WindProven™ eligible Class 4 impact 30-yr algae protection

Service Area

Roof Replacement Service Area

American Group Construction serves homeowners throughout Northern Virginia, Washington DC, and Maryland, including:

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

Manassas and Manassas Park
Gainesville, Haymarket, and Bristow
Alexandria and Arlington
Washington DC and Maryland

Frequently Asked Questions About Roof Replacement

What warranty comes with a roof replacement from American Group Construction?

Every replacement comes with two layers of coverage. American Group Construction provides a workmanship warranty of up to 25 years covering installation defects. GAF materials installed by our Certified Plus team are covered by the GAF Silver Pledge Limited Warranty — Lifetime† coverage on manufacturing defects, WindProven™ wind protection with no maximum wind speed restriction, and up to 30 years of algae protection.

How long does a roof replacement take?

Most residential roof replacements are completed in a single day. Larger or more complex roofs may require two days. A realistic timeline is provided in every written estimate before work begins.

What does roof replacement cost in Northern Virginia?

A typical residential asphalt shingle replacement ranges from $8,000 to $20,000 or more depending on roof size, pitch, material selection, and deck condition. American Group Construction provides free, detailed written estimates so homeowners know the full cost before work begins.

Does American Group Construction offer financing?

Yes. Flexible financing options are available for qualified homeowners. Contact American Group Construction to discuss options and eligibility for your project.

How do I know if I need replacement or just a repair?

The best way to find out is a free inspection. We give an honest recommendation — if a repair solves the problem, we say so. Indicators that replacement is needed include roof age over 20 years, widespread shingle deterioration, recurring leaks, sagging decking, and significant storm damage.