EXPERT ROOFING GUIDE

Standing Seam Metal Roof Cost in 2026: What You'll Actually Pay (Material, Labor, and Total)

By David KarimiMarch 6, 202620 min read

A standing seam metal roof costs $10 to $18 per square foot installed for most homeowners, according to aggregated data from Today's Homeowner, Modernize, and Angi. For a typical 2,000-square-foot roof, that puts the total project cost between $20,000 and $36,000 depending on the metal you choose and the complexity of your roof.

Here is the quick comparison most people are looking for:

  • Standing seam metal: $10 – $18/sq ft installed | 40-70 year lifespan
  • Corrugated metal panels: $7 – $12/sq ft installed | 25-40 year lifespan
  • Asphalt architectural shingles: $4 – $8/sq ft installed | 15-30 year lifespan

Those numbers tell part of the story. What they do not tell you is that a standing seam roof installed today will likely be the last roof you ever buy. When you run the full 30-year cost including replacements, maintenance, insurance savings, and energy savings, standing seam consistently costs less than asphalt shingles. We will break down exactly how that math works later in this guide.

What Is a Standing Seam Metal Roof?

A standing seam metal roof uses long metal panels that run vertically from the ridge of your roof to the eave. The panels connect along raised seams — typically 1 to 2 inches tall — that interlock and snap or mechanically lock together. The critical distinction is that all fasteners are hidden beneath the seams, never exposed to the weather.

This is what separates standing seam from cheaper exposed fastener metal panels (corrugated or ribbed panels). With exposed fastener systems, screws go directly through the metal surface. Over time, those screws back out, the rubber washers degrade, and every single screw hole becomes a potential leak point. Standing seam eliminates that problem entirely.

The concealed fastener system is also why standing seam costs more. The panels are precision-engineered to interlock, the material gauge is heavier, and installation requires more skill and time. You are paying for a roofing system that is fundamentally different from — and more durable than — every other option on the market.

Standing Seam Metal Roof Cost Per Square Foot

Cost by Material Type

The metal you choose is the biggest single factor in your standing seam cost. Here is what each material costs for materials alone versus fully installed, based on data from Western States Metal Roofing and Modernize:

Metal TypeMaterials Only (/sq ft)Installed (/sq ft)Best For
Steel (Galvalume/galvanized)$1.50 – $3.50$8 – $16Most residential homes, best value
Steel (painted/PVDF finish)$2.00 – $5.00$10 – $18Homes where color and curb appeal matter
Aluminum$3.50 – $6.50$10 – $17Coastal homes, salt air environments
Zinc$6.00 – $10.00$14 – $25Architectural projects, self-healing finish
Copper$9.00 – $12.00$20 – $35Historic homes, premium aesthetics

Steel is what most homeowners choose, and for good reason. Painted steel with a PVDF (Kynar 500) finish gives you decades of color retention at a fraction of what copper or zinc costs. The PVDF coating is the same industrial-grade finish used on commercial buildings — it resists fading, chalking, and corrosion far better than standard painted finishes.

Aluminum is the right call for coastal properties. If your home is within 10 to 15 miles of the ocean, salt air will corrode steel faster than aluminum. The material cost premium of $2 to $3 per square foot is a smart investment when it prevents corrosion problems 10 years down the road.

Copper and zinc are premium choices that make sense for historic restorations or homeowners who want a roof that develops a natural patina over time. Both metals are self-healing — minor scratches seal themselves through oxidation. But at $20 to $35 per square foot installed, they are three to four times the cost of steel.

24 Gauge vs 26 Gauge: What You Need to Know

This is a point that most cost guides miss entirely: standing seam roofing systems require 24-gauge steel minimum. 26-gauge steel is not available for standing seam applications.

Here is why that matters:

  • 24 gauge is 0.025 inches thick. It has the structural rigidity needed to span between attachment clips without oil-canning (visible waviness in the panel face).
  • 26 gauge is 0.0188 inches thick — roughly 30% thinner. It is used for exposed fastener panels (corrugated, ribbed) where the screws provide additional structural support.

Per Western States Metal Roofing and Sheffield Metals, 24-gauge material costs approximately 30% more than 26-gauge. This is one of the reasons standing seam costs more than corrugated — the metal itself is heavier and more expensive before you even factor in the concealed fastener engineering.

Panel-level pricing for 24-gauge standing seam (materials only):

Panel SpecificationCost (/sq ft)Source
24ga Galvalume (bare metal)$2.20 – $4.05Western States Metal Roofing
24ga PVDF painted finish$2.60 – $5.00Western States Metal Roofing
24ga specialty paint finish$4.15 – $8.25Western States Metal Roofing

Important cost note: Trim and flashing add 30% to 40% on top of panel costs, per Western States Metal Roofing. Every ridge cap, drip edge, valley flashing, and pipe boot collar is custom-bent metal. When you see a “materials only” quote, make sure it includes trim — not just panels.

If a contractor offers you 26-gauge standing seam, ask questions. Either they are using an exposed fastener system and calling it standing seam, or they are cutting corners on material spec. Neither is what you want.

Total Project Cost by Roof Size

Here is what a complete standing seam metal roof installation costs based on roof size. The “NJ Installed” column reflects New Jersey labor rates, which run higher than national averages due to higher cost of living, stricter building codes, and stronger labor markets.

Roof Size (sq ft)Low End (National)Average (National)High End (National)NJ Installed (Typical)
1,000$10,000$14,000 – $16,500$35,000$12,000 – $20,000
1,500$12,000$23,250 – $27,225$60,000$18,000 – $30,000
2,000$16,000$31,000 – $36,300$80,000$24,000 – $40,000
2,500$20,000$38,750 – $45,375$100,000$30,000 – $50,000
3,000$24,000$46,500 – $54,450$120,000$36,000 – $60,000

Why the ranges are so wide: The low end assumes a simple gable roof with steel Galvalume panels. The high end assumes a complex roof with multiple valleys, dormers, skylights, and premium materials like copper or zinc. Most homeowners fall somewhere in the average range with painted steel panels on a moderately complex roof.

About those NJ numbers: New Jersey sits in one of the highest-cost labor markets on the East Coast. Northern NJ counties near New York City (Essex, Bergen, Hudson) command the highest rates. Central and southern NJ are somewhat lower but still above national averages. The NJ column reflects typical installed costs including labor, materials, trim, underlayment, permits, and cleanup — not just panel prices.

What Affects Your Standing Seam Roof Cost

Eight factors determine where your project falls within those ranges. Understanding each one helps you compare quotes accurately and avoid surprises.

Material Type and Gauge

As covered above, steel is the most affordable option and copper is the most expensive. The choice between Galvalume (bare metal) and PVDF-painted steel adds $0.40 to $1.00 per square foot to your materials cost, per Western States Metal Roofing. For most homeowners, the painted finish is worth the upcharge — it looks significantly better and carries a longer color warranty (typically 30 to 40 years).

Roof Pitch and Complexity

A standing seam roof on a simple gable (two flat planes meeting at a ridge) is the most straightforward installation. Every additional feature adds cost:

  • Steep pitch (above 6:12): Adds 15% to 30% to labor. Safety equipment and slower installation pace.
  • Valleys: Where two roof planes meet at an interior angle. Each valley requires custom-bent flashing.
  • Dormers and gables: Multiple direction changes mean more cutting, fitting, and flashing.
  • Hips: Angled ridges where two roof planes meet at an exterior angle. More complex than a simple ridge.

A complex roof with 8 or 10 facets, multiple dormers, and several valleys can cost 30% to 50% more than a simple two-plane gable of the same square footage. For more detail on slope requirements, see our metal roof pitch requirements guide.

Panel Profile and Width

Standing seam panels come in different widths, typically 12 inches, 16 inches, or 18 inches. Narrower panels mean more seams per roof, which increases both material and labor costs. The choice often comes down to aesthetics — narrower panels create a more defined, linear look that many homeowners prefer on residential homes.

Lock and Attachment Type

Standing seam panels connect in one of two ways:

  • Snap-lock: Panels click together without special tools. Faster to install, less expensive. Best for moderate climates.
  • Mechanical lock (single or double): A hand seamer or mechanical seamer folds the seams together on the roof. Stronger connection, better wind resistance. Required for low-slope applications and recommended for high-wind zones. Adds $1 to $3 per square foot in labor.

If you live in a high-wind area or your roof has a pitch below 3:12, mechanical lock is not optional — it is necessary. The additional cost buys you a roof that can withstand wind speeds exceeding 140 mph.

Tear-Off vs. Overlay

In most cases, the existing roof needs to be removed before standing seam panels go on. Tear-off adds $1 to $3 per square foot to your project cost. The total depends on what is coming off:

  • Single layer of asphalt shingles: $1 to $2 per square foot for removal and disposal.
  • Multiple shingle layers: $2 to $3 per square foot. More weight, more labor, more disposal cost.
  • Existing metal roof: $1.50 to $3 per square foot. Fastener removal is time-intensive.

Some contractors offer to install over existing shingles with a batten system, which saves on tear-off cost. This can work if the existing decking is in good condition and local building codes allow it. However, overlaying hides any decking damage underneath, and most standing seam manufacturers require a clean deck for their warranty to apply.

Underlayment, Flashing, and Trim

This is where hidden costs catch homeowners off guard. Per Western States Metal Roofing, trim and flashing add 30% to 40% on top of panel cost. On a $15,000 panel order, that is $4,500 to $6,000 in trim alone.

What you need:

  • Synthetic underlayment: A moisture barrier between the decking and metal panels. $0.50 to $1.50 per square foot.
  • Ice and water shield: Self-adhering membrane at eaves, valleys, and penetrations. Required by code in most states. $1 to $3 per linear foot.
  • Ridge cap, drip edge, gable trim: Custom-bent metal pieces that finish every edge and transition. Priced by the linear foot.
  • Pipe boots and penetration flashing: Each roof penetration (vent pipes, HVAC, exhaust fans) needs a custom collar. $50 to $200 each.

A legitimate quote should itemize these components. If a contractor gives you a single lump-sum number with no line items, ask for a breakdown.

Permits and Inspections

Roofing permits vary by municipality but typically run $200 to $1,000. New Jersey requires a building permit for any roof replacement, and inspections are mandatory in most townships. Some NJ municipalities also require a zoning review for metal roofing, particularly in historic districts.

Labor Rates in Your Area

Labor is typically 50% to 60% of total standing seam installation cost. Rates vary significantly by region:

MarketLabor Rate (/sq ft)Hourly Rate
National average$2.00 – $6.00$45 – $70/hr
New Jersey$2.50 – $4.50$55 – $95/hr
NJ premium areas (Essex, Bergen, Hudson)Higher end of range$75 – $95+/hr

Why NJ labor costs more: New Jersey has some of the highest construction labor rates in the country. Workers' compensation insurance is more expensive. Building code requirements are stricter, which means more inspection time and compliance work. And standing seam installation is a specialty — not every roofing crew can do it. The crews that can are in high demand.

Northern NJ counties near New York City consistently command the highest labor rates. If your home is in Bergen, Essex, or Hudson County, budget toward the top end of every range in this guide.

Standing Seam vs Shingles: 30-Year Cost Comparison

This is the table that changes how most homeowners think about standing seam pricing. The upfront cost is higher. The lifetime cost is lower. Here is the full math for a 2,000-square-foot roof.

Cost CategoryStanding Seam MetalArchitectural Shingles
Upfront installation$28,000$12,000
Year 20: Shingle replacement$0$15,000 (inflation-adjusted)
Repairs over 30 years$1,500 – $3,000$4,000 – $8,000
Annual maintenance (x30)$3,000 ($100/yr)$9,000 ($300/yr)
Insurance savings (x30)-$4,500 to -$9,000$0
Energy savings (x30)-$3,000 to -$9,000$0
30-YEAR TOTAL COST$19,000 – $26,000$40,000 – $44,000

One source (Rockland Builders) calculated that a 2,000-square-foot roof costs approximately $57,000 with asphalt shingles over 45 years versus approximately $23,000 for metal. Standing seam breaks even with shingles at roughly the 15 to 20-year mark — after that, every year is money saved.

The insurance savings alone are significant. According to Western States Metal Roofing and ATR Roofing, metal roofs with Class 4 impact and Class A fire ratings can qualify for homeowner's insurance premium reductions of 5% to 35%. On a $2,000 annual premium, that is $100 to $700 per year in savings. Over 30 years, it adds up.

Energy savings are real and documented. The Metal Roofing Alliance reports that metal roofs can reduce cooling costs by 10% to 40%. The U.S. Department of Energy confirms that cool roof products (including metal) can save up to 15% on energy costs for single-story buildings. The Cool Roof Rating Council notes that metal roofs reflect up to 70% of solar energy. For homeowners in warm climates, the annual savings range from $100 to $500 or more.

Is a Standing Seam Metal Roof Worth the Investment?

The 30-year TCO comparison answers this question with numbers. But there are several additional financial benefits that strengthen the case.

Home Value and Resale ROI

A standing seam metal roof increases your home's resale value. According to DECRA and industry data, metal roofing delivers a 48.1% to 85.9% return on investment nationally. East Coast markets see even higher returns — up to 95.5% cost recovery, per regional market data. Angi reports that metal roofs can increase a home's resale value by up to 6% compared to asphalt shingles.

For a $400,000 New Jersey home, a 4% to 6% value increase means $16,000 to $24,000 added to your sale price — before you factor in the buyer appeal of knowing they will never need to replace the roof.

Insurance Premium Reductions

Metal roofs with Class 4 impact resistance and Class A fire ratings qualify for insurance discounts of 5% to 35% on dwelling coverage, according to Western States Metal Roofing and ATR Roofing. The average discount is roughly 20%. In hail-prone regions, discounts can reach 30%, per Western States. Standing seam systems are among the highest-rated roofing options for impact resistance because the concealed fastener design and heavier gauge steel absorb impacts without exposing the underlayment.

Warranty Protection

Standing seam metal roofs carry some of the strongest warranties in the roofing industry:

  • Paint/finish warranty: 30 to 40 years standard from most manufacturers, per Bill Ragan Roofing and Rescue My Roof.
  • Transferable warranty: Up to 50 years from manufacturers like Interlock Roofing and True Metal Supply.
  • Galvalume substrate warranty: 25 to 50 years depending on manufacturer.
  • Repaint cycle: After the paint warranty period, a repaint can extend the roof's life an additional 30 to 50 years, per Mountaintop Construction. Total potential lifespan: 80 to 100+ years.

Compare that to architectural shingles, which carry 25 to 30-year prorated warranties that decline in value over time. The standing seam warranty protects you at full value for decades longer.

NJ Weather Performance

New Jersey weather throws everything at your roof — ice storms, nor'easters, summer heat, coastal wind, and the occasional hurricane remnant. Standing seam handles all of it:

  • Wind resistance: Mechanical-lock standing seam is rated for 140+ mph wind speeds. Critical for coastal NJ.
  • Ice dam prevention: The smooth metal surface sheds snow and ice before dams can form. A major advantage over shingles in northern NJ winters.
  • No shingle blow-off: Concealed fasteners mean nothing can lift or peel in high winds.
  • Thermal cycling: Metal expands and contracts with temperature changes. The clip attachment system allows this movement without stress on fasteners — unlike exposed fastener panels where screws can loosen over thousands of thermal cycles.

How to Save Money on a Standing Seam Metal Roof

Standing seam is a premium product, but there are legitimate ways to manage the cost without cutting corners on quality.

Choose Steel Over Aluminum (for Non-Coastal Homes)

If your home is more than 15 miles from the ocean, painted steel delivers the same performance as aluminum at $2 to $3 less per square foot in materials, based on Western States Metal Roofing pricing. That is $4,000 to $6,000 in savings on a 2,000-square-foot roof. Aluminum only makes sense where salt air corrosion is a real concern.

Schedule for Late Fall or Winter

In New Jersey, roofing demand peaks from April through October. Scheduling your installation in November through February — when crews have more availability — can sometimes save 5% to 10% on labor. The installation itself is not weather-dependent in the same way shingle work is. Metal panels can be installed in colder temperatures without the adhesion issues that affect asphalt shingles.

Get Three or More Quotes

This is not negotiable. Standing seam pricing varies significantly between contractors because material markup, labor rates, and overhead all differ. Three quotes gives you a reliable range for your specific roof. Make sure each quote includes the same scope: panels, trim, underlayment, tear-off, permits, and cleanup. Apples-to-apples comparison requires line-item detail.

Ask About Financing

Many roofing contractors offer financing through third-party lenders. Typical terms are 5 to 15 years at 5% to 12% APR. On a $30,000 project, a 10-year loan at 7% puts your monthly payment around $350. When you subtract the monthly insurance and energy savings ($30 to $80 per month combined), the effective out-of-pocket cost drops significantly.

Consider Insurance Claims for Storm Damage

If your existing roof has storm damage, your homeowner's insurance may cover part or all of the replacement cost. Filing a legitimate claim for hail, wind, or impact damage can offset thousands of dollars. The upgrade from shingles to standing seam is typically the homeowner's responsibility (the “betterment” cost), but the base replacement is often covered. Learn more about hail damage roofing services.

Do Not Attempt DIY Installation

This deserves its own mention because it comes up often. Standing seam installation is not a DIY project. The panels require specialized tools (seamers, notchers, panel cutters), the flashing and trim work demands experience to get watertight, and most manufacturers void the warranty if the panels are not installed by a certified contractor. A botched DIY installation can cost more to fix than the original professional installation would have cost. There is also the safety issue — metal panels on a pitched roof are extremely slippery.

NJ vs National Pricing: Side-by-Side Comparison

Here is how New Jersey standing seam costs compare to national averages for a 2,000-square-foot roof with steel panels and moderate complexity.

Cost ComponentNational AverageNew Jersey TypicalNJ Premium Over National
Materials (panels + trim)$8,000 – $14,000$8,500 – $15,000+5-10%
Labor$8,000 – $16,000$10,000 – $20,000+20-30%
Tear-off and disposal$2,000 – $4,000$2,500 – $5,000+15-25%
Underlayment and accessories$1,500 – $3,000$1,800 – $3,500+10-20%
Permits and inspections$200 – $800$400 – $1,000Higher code requirements
Total project$20,000 – $36,000$24,000 – $44,000+15-25% overall

The NJ premium is real, but it is driven by legitimate factors: higher labor costs, stricter building codes, more expensive permits, and a higher cost of living that runs through every part of the supply chain. Contractors who quote significantly below these ranges are either cutting corners on materials, using inexperienced crews, or planning to hit you with change orders mid-project.

Frequently Asked Questions About Standing Seam Metal Roof Cost

How much does a standing seam metal roof cost per square foot?

Standing seam metal roofs cost $10 to $18 per square foot fully installed for steel panels, according to aggregated data from Today's Homeowner, Modernize, and Angi. Materials alone run $1.50 to $5.00 per square foot for steel and $3.50 to $6.50 for aluminum, per Western States Metal Roofing. The remaining $6 to $14 per square foot covers labor, underlayment, trim, flashing, permits, and cleanup. In New Jersey, expect costs at the higher end of these ranges due to elevated labor rates and stricter building codes.

Is a standing seam metal roof worth the extra cost?

Yes, for most homeowners planning to stay in their home more than 10 to 15 years. The 30-year total cost of ownership for standing seam ($19,000 to $26,000 on a 2,000 sq ft roof) is roughly half the 30-year cost of asphalt shingles ($40,000 to $44,000) when you factor in the shingle replacement at year 20, higher maintenance costs, and the insurance and energy savings that metal provides. Standing seam also adds up to 6% to your home's resale value, per Angi, and carries warranties of 30 to 50 years versus 25 to 30 years for architectural shingles.

How much does a standing seam metal roof cost vs shingles?

For a 2,000-square-foot roof, standing seam costs $20,000 to $36,000 versus $8,000 to $16,000 for architectural shingles. Standing seam costs roughly 2 to 2.5 times more upfront. However, shingle roofs need replacement every 15 to 30 years (per McElroy Metal), while standing seam lasts 40 to 70 years (per Bill Ragan Roofing and manufacturer data). Over 30 years, the total cost of ownership for standing seam is typically lower because you avoid the $15,000+ second shingle installation and benefit from insurance discounts (5-35%, per Western States) and energy savings (10-40% cooling reduction, per Metal Roofing Alliance). For a detailed side-by-side breakdown, see our metal roof vs shingles cost comparison.

What is the labor cost to install a standing seam metal roof?

Labor for standing seam installation runs $2 to $6 per square foot nationally, according to Angi, which sources its data from the U.S. Bureau of Labor Statistics. In New Jersey, labor costs $2.50 to $4.50 per square foot for standard roofing work, with hourly rates of $55 to $95 per hour versus the national average of $45 to $70 per hour (per HomeHero Roofing). Northern NJ counties near NYC command the highest rates. Labor typically accounts for 50% to 60% of total project cost for standing seam because the concealed fastener system requires more skill and time than exposed fastener metal or shingle installation.

How much does a 24-gauge standing seam metal roof cost?

A 24-gauge standing seam roof is the industry standard — it is the only gauge option for standing seam systems. Per Western States Metal Roofing and Sheffield Metals, standing seam requires 24-gauge steel minimum (0.025 inches thick) for structural rigidity. The thinner 26-gauge (0.0188 inches) is only used for exposed fastener panels, not standing seam. For 24-gauge panels, materials cost $2.20 to $4.05 per square foot for Galvalume and $2.60 to $5.00 for PVDF painted finish, per Western States Metal Roofing. Fully installed, a 24-gauge standing seam roof costs $10 to $18 per square foot.

What is the cheapest standing seam metal roof option?

The most affordable standing seam option is 24-gauge Galvalume steel with a snap-lock profile. Galvalume panels cost $2.20 to $4.05 per square foot for materials (per Western States Metal Roofing) and $8 to $14 per square foot installed. Galvalume has a bare metallic appearance — no paint — which some homeowners like and others do not. If you want color, PVDF-painted steel adds $0.40 to $1.00 per square foot. The cheapest full project cost is roughly $10 per square foot installed on a simple gable roof, putting a 2,000-square-foot roof at approximately $20,000.

How long does a standing seam metal roof last?

Standing seam metal roofs last 40 to 70 years with proper installation, according to Bill Ragan Roofing and manufacturer data. Premium manufacturers like Interlock Roofing and True Metal Supply offer lifetime limited warranties with 50-year transferable coverage. The paint or finish typically carries a separate 30 to 40-year warranty. After the paint warranty period, the panels can be repainted to extend the roof's life an additional 30 to 50 years, per Mountaintop Construction — bringing total potential lifespan to 80 to 100+ years. By comparison, architectural asphalt shingles last 15 to 30 years, per McElroy Metal.

Does a standing seam metal roof increase home value?

Yes. According to DECRA and industry data, metal roofing delivers a 48.1% to 85.9% return on investment nationally, with East Coast markets seeing up to 95.5% cost recovery. Angi reports that metal roofs can increase a home's resale value by up to 6% compared to asphalt shingles. For a $400,000 home, that is $16,000 to $24,000 in added value. Beyond the appraised value, standing seam is a strong selling point with buyers because it eliminates the “how old is the roof?” negotiation that costs sellers thousands in most home sales.

Can you walk on a standing seam metal roof?

Yes, but carefully. Standing seam panels can support foot traffic when you step on the flat part of the panel between the seams — never directly on the raised seam itself. Walking on the seams can dent or deform them, potentially compromising the water seal. Rubber-soled shoes provide the best traction on metal surfaces. That said, one of the advantages of standing seam is that it rarely requires walking on the roof. There are no shingles to replace, no granules to sweep, and no exposed fasteners to tighten. Most maintenance can be done from a ladder or with a soft-bristle brush for debris removal.

What do you put under a standing seam metal roof?

Under standing seam panels, you need three layers of protection between the metal and your roof decking:

  1. Roof decking (plywood or OSB) — the structural base. Must be in solid condition with no rot or soft spots.
  2. Synthetic underlayment — a breathable moisture barrier laid over the decking. Costs $0.50 to $1.50 per square foot. Synthetic is preferred over felt paper for metal roofs because it does not wrinkle or absorb moisture.
  3. Ice and water shield — a self-adhering rubberized membrane installed at eaves, valleys, and around all penetrations. Required by building code in most states, including New Jersey. Costs $1 to $3 per linear foot.

Some installations also include a slip sheet between the underlayment and the metal panels to reduce friction noise during thermal expansion. The panels attach to the decking via concealed clips that allow the metal to expand and contract without stress on the fasteners.

Get a Standing Seam Metal Roof Estimate in New Jersey

If you are considering standing seam for your New Jersey home, the best next step is getting a quote based on your actual roof — not national averages from a website. Every roof has different dimensions, pitch, complexity, and access considerations that affect the final price.

A qualified standing seam contractor will measure your roof, walk you through material options (steel vs aluminum, Galvalume vs painted, snap-lock vs mechanical), and give you a detailed line-item quote so you know exactly what you are paying for and why.

When evaluating contractors, look for GAF or manufacturer certification, a strong track record of Google reviews, and BBB accreditation. Ask for references from recent standing seam installations specifically — not just general roofing work. Standing seam is a specialty, and you want a crew that does it regularly.

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