Metal Roofing

Gray Oak Roofing & Exteriors offers stunning, long-lasting metal roofs built to withstand the elements.

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Decades of Protection with Virtually No Maintenance

Metal roofing has earned its place in the residential market not through marketing but through performance. A properly installed standing seam or architectural metal roof resists the weather events, thermal cycling, and long-term wear that shorten the life of other roofing materials — and it does so with minimal maintenance demands on the homeowner. Where an asphalt shingle roof requires attention every 25 to 35 years, a quality metal roof installed correctly is a 50-year decision. For many homeowners, it’s the last roof they’ll ever put on their home.

Metal roofing is also no longer a single aesthetic. Standing seam steel and aluminum bring a clean, contemporary sight line well suited to modern architecture and premium residential builds. Metal shingles and shake profiles replicate the dimensional appearance of traditional materials with the durability and Class 4 impact resistance of metal. Copper delivers the unmatched character and longevity that has made it the premium specification on fine homes for centuries. The right product depends on your home’s architecture, its roofline, and what you’re trying to achieve.

At Gray Oak Roofing & Exteriors, we install standing seam, metal shingle, and copper roofing systems for homeowners across Montgomery, Delaware, and Chester Counties — on full roof replacements, low-slope and flat sections, and accent applications on dormers, bays, and additions.

What We Offer

Full Roof Replacement

A complete metal roofing installation from the deck up — substrate preparation, underlayment appropriate for the specific metal product, panel or shingle installation with properly managed thermal movement, and integrated flashing at every wall, chimney, penetration, and transition. Metal roofing installation requires a different set of details than asphalt — expansion and contraction across large metal panels, fastener placement, and the seaming and locking of standing seam profiles all demand precision that determines whether the system performs as designed for decades or develops problems within a few years of installation.

Low-Slope & Flat Metal Applications

Many homes throughout our service area include low-slope sections — rear additions, bay window roofs, sunroom covers, and sections of colonial and split-level homes where the pitch is too shallow for a shingle product to perform reliably. Metal is one of the most durable specifications for these applications. We install standing seam panels on low-slope sections where the profile and seam height accommodate the reduced drainage angle, providing a weather-tight system that handles standing water and thermal movement without the membrane failures common on improperly specified flat roof assemblies.

Accent Sections — Dormers, Bays & Additions

Some of the most visually impactful metal roofing work on Main Line homes isn’t a full roof replacement — it’s the thoughtful use of copper or standing seam on dormers, bay windows, porticos, and addition roofs where a premium material makes a significant contribution to the home’s architectural character. A copper dormer on a stone Tudor in Gladwyne or a standing seam bay roof on a colonial in Bryn Mawr brings a material distinction that composite and asphalt products simply can’t replicate. We install accent metal roofing as a standalone scope as well as in conjunction with full roof replacement projects.

Why Metal Roofing in This Region

The Philadelphia suburbs present conditions where metal roofing’s performance advantages are particularly relevant. The combination of heavy rainfall, significant snow and ice load, severe storm events with hail and high winds, and repeated freeze-thaw cycling across the winter months puts real stress on any roofing system. Metal handles all of it better than any alternative — it sheds snow load naturally, resists hail impact at Class 4 levels, carries wind ratings that exceed what most residential shingle products offer, and doesn’t absorb moisture the way organic materials do.

The Main Line and surrounding communities also present the architectural context where metal roofing’s premium profile fits naturally. The stone colonials, Tudor revivals, and contemporary builds throughout the service area are homes where material quality is visible and where the long-term investment in a premium roofing specification makes genuine sense. A standing seam roof on a Wayne contemporary or copper dormers on a Merion Station Tudor aren’t just performance decisions — they’re architectural ones.

Metal is also increasingly specified as the correct material for the low-slope sections common on older homes throughout our service area — rear additions, sunroom roofs, and the shallow-pitch bays and dormers that don’t perform well under asphalt shingles. In these applications metal isn’t a premium upgrade so much as the appropriate specification for the conditions.

The Gray Oak Standard

Metal roofing installation tolerates imprecision less than almost any other roofing material. Improper fastener placement causes oil-canning in flat panels. Inadequate provision for thermal movement causes seam failures and fastener back-out over time. Flashing details that work adequately on a shingle roof will fail on a metal system where water behavior and thermal dynamics are fundamentally different. The details matter on every roof — on metal they’re non-negotiable.

Every metal roofing project is managed personally from estimate to completion — one contact, one standard, start to finish. We select products we stand behind, execute every detail to the standard the material demands, and finish each installation knowing it will be performing decades from now. When the work is done you’ll know exactly what was installed and why — and you’ll have a direct line back to us if you ever need it.

Metal Roofing Products

Standing Seam — Steel & Aluminum

Standing seam is the premium specification for residential metal roofing — concealed fasteners, mechanically seamed or snap-lock panel joints that run vertically up the roof plane, and a clean uninterrupted sight line from eave to ridge. The concealed fastener system eliminates the penetration points that cause long-term leakage in exposed fastener products and accommodates thermal movement through the seam profile rather than through fastener holes. Standing seam steel with a Galvalume or painted finish is the most common specification for residential applications — available in a broad range of colors with finishes warranted for 40 years or more. Standing seam aluminum is specified where the lighter weight of aluminum is a structural consideration or where long-term corrosion resistance in demanding environments is the priority.

Metal Shingles & Shake Profiles

Metal shingles replicate the dimensional appearance of traditional roofing materials — asphalt shingles, wood shake, slate, and tile — in a steel or aluminum substrate with the performance characteristics of metal. Class 4 impact ratings, wind resistance well above standard shingle products, and service lives of 40 to 50 years make metal shingles a compelling specification for homeowners who want the visual character of a traditional material with the durability and low maintenance of metal. The interlocking panel design provides a secondary weather barrier at every joint, and the profiles are available in a range of colors and textures that integrate naturally with the architectural character of homes throughout our service area.

Copper Roofing

Copper is the premium specification for metal roofing and has been for centuries — used on cathedrals, government buildings, and fine homes because nothing else combines its longevity, workability, and the visual character it develops over time. A properly installed copper roof will last 100 years or more, developing the distinctive blue-green patina that is one of the most recognizable and admired finishes in architecture. On Main Line homes — the stone Tudors, slate-roofed colonials, and historic estates throughout Gladwyne, Merion Station, Haverford, and Bryn Mawr — copper dormers, bays, and accent sections are a historically appropriate and architecturally distinctive specification. We install copper in standing seam and flat-seam profiles for full roof applications and accent work, using 16 oz and 20 oz cold-rolled copper appropriate to the application.

What Makes Metal Roofing Perform

Thermal Movement

Metal expands and contracts significantly with temperature change — a 40-foot run of steel panel can move nearly half an inch between the coldest winter night and the hottest summer afternoon. A metal roofing system that doesn’t accommodate this movement properly will develop fastener back-out, seam failures, and oil-canning in flat panel sections within a few years of installation. Standing seam profiles are specifically engineered to accommodate thermal movement through the seam — it’s one of the primary performance advantages of the system.

Underlayment

Metal roofing requires specific underlayment products compatible with the thermal dynamics of the metal above them. Standard synthetic underlayment used under asphalt shingles can off-gas at the temperatures reached under a metal panel in summer, causing adhesion problems and accelerating underlayment degradation. Self-adhering high-temperature underlayments or vented synthetic products appropriate for metal applications are the correct specification — a detail that matters significantly for long-term system performance.

Dissimilar Metals

Where copper comes into contact with steel or aluminum — at flashings, fasteners, or transitions between different metal products — galvanic corrosion accelerates deterioration at the contact point. Properly designed metal roofing systems use compatible metals at every transition or isolate dissimilar metals with appropriate barriers. This is a detail that’s easy to get wrong and expensive to address after the fact.

Noise

The perception that metal roofs are noisy in rain is largely a product of the exposed metal roof on agricultural buildings — thin panels with no insulation beneath them. A residential metal roof installed over solid decking with appropriate underlayment performs similarly to any other roofing material in terms of interior sound transmission. Homeowners who have experienced a properly installed residential metal roof rarely report noise as a concern.

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As a local roofing company, we’re here to help you protect what matters most, your home.

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Wynnewood, PA
Phone: (610) 995-6260
Email: adam@grayoakroofing.com

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Signs Your Existing Metal Roof Needs Attention

Signs Your Existing Metal Roof Needs Attention

  • Visible rust staining running from seams — indicates coating failure requiring prompt attention
  • Oil-canning — visible waviness in flat panel sections, a sign of improper installation or inadequate thermal movement provision
  • Active leaks at penetrations, seams, or wall transitions — often a flashing failure rather than panel failure
  • Loose or lifted panel sections — particularly after high wind events
  • Copper sections that have developed holes or through-corrosion at areas of prolonged water ponding

What to Expect

  • Assessment & Estimate — We evaluate your roof's pitch, substrate, and existing conditions. We give you a clear picture of the product options appropriate for your home and a written estimate for the path that makes sense.
  • Product Selection — We walk you through the standing seam, metal shingle, or copper options appropriate for your application — profile, finish color, and gauge. We explain the differences plainly and let you make an informed decision.
  • Scheduling — We commit to a start date and communicate clearly throughout. One point of contact from first call to completion.
  • Substrate Preparation — Deck inspection and repair as needed, appropriate underlayment installation for the specific metal product specified.
  • Panel or Shingle Installation — Installed with proper provision for thermal movement, concealed fasteners, and all flashings integrated at every transition.
  • Final Walkthrough — We walk the completed installation with you, confirm every seam and transition, and address any questions before we consider the job complete.
  • Follow-Up — Direct line back to the person who managed your project for anything that comes up after completion.
What To Expect - Metal Roofing

Frequently Asked Questions

Some frequently asked questions and useful answers.

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How long does a metal roof last?

Standing seam steel and aluminum systems from quality manufacturers carry warranties of 40 to 50 years on the finish and are routinely specified with service life expectations of 50 years or more. Copper exceeds all of that — properly installed copper roofing has a documented service life of 100 years or more. Metal shingle products typically carry 40 to 50 year warranties. The variables that most affect longevity are installation quality, the specific finish and coating system on steel products, and how well the system’s thermal movement provisions were executed at installation.

Not on a properly installed residential system. The perception comes from agricultural and industrial buildings where thin panels span open framing with no insulation or decking beneath them. A residential metal roof installed over solid sheathing with appropriate underlayment has effectively the same interior noise profile as any other roofing material during rain. It’s one of the more persistent misconceptions about residential metal roofing and one that homeowners who’ve lived under a properly installed system quickly put to rest.

In most cases favorably. Class 4 impact-rated metal roofing products — which includes most standing seam and metal shingle systems — qualify for the same impact-resistant discount as Class 4 asphalt shingles on most carrier policies in Pennsylvania. The discount varies by carrier and policy but is typically in the range of 10 to 30 percent on the wind and hail portion of the premium. Worth a conversation with your insurance agent before finalizing the product selection.

In some cases yes — metal can be installed over existing asphalt shingles where the deck is sound, the existing shingle layer is flat and stable, and local code permits it. The more significant concern with metal-over-shingle is that an uneven substrate telegraphs through to the finished metal surface, which is particularly visible on standing seam panels. We assess existing conditions at every estimate and give you a clear picture of whether an overlay is appropriate for your specific situation.

Standing seam delivers a clean, contemporary sight line — vertical panel runs from eave to ridge with raised seams as the only visible profile element. It suits modern architecture, premium residential builds, and any application where a bold, minimal aesthetic is the goal. Metal shingles replicate the dimensional appearance of traditional materials and integrate more naturally with the architectural character of colonial and Tudor-style homes where a standing seam profile would look out of place. Both deliver similar performance — the choice is primarily architectural. We’ll give you our view on which suits your home at the estimate.

Both are legitimate applications — the choice is primarily driven by budget and the architectural scale of the project. Full copper roofs are specified on historic restorations, significant estate homes, and projects where 100-year service life and architectural distinction justify the material cost. Copper accent work — dormers, bay roofs, porticos — is more common and delivers a meaningful architectural impact at a scope accessible to a broader range of homeowners. On the Main Line’s historic homes, copper accents are often the historically correct specification and the one that best serves the building’s long-term character.

Absolutely — and in many cases it’s the most appropriate specification. The stone Tudors, slate-roofed colonials, and historic estates throughout Gladwyne, Merion Station, and Bryn Mawr were originally built with premium, long-lived roofing materials. Metal — particularly copper accents and standing seam on specific sections — fits naturally within that tradition. For full roof replacements on period-style homes, standing seam and metal shingles are both well-suited specifications that complement the architectural character without requiring the ongoing maintenance that original materials often do.

Better than any alternative. Metal’s smooth, low-friction surface sheds snow load naturally — it doesn’t hold the accumulation that flat or textured surfaces do, which reduces structural load after heavy snowfall. Ice dams, which form when heat loss through the roof deck melts snow that then refreezes at the eaves, are a function of attic ventilation and insulation rather than the roofing material itself. Metal doesn’t eliminate ice dams but its surface sheds water efficiently once melting begins, reducing the backup that causes interior damage. Proper attic ventilation addressed at installation is the correct solution for ice dam prevention regardless of the roofing material.

Very little — which is one of metal’s primary selling points. An annual visual inspection to confirm flashings and sealant at penetrations are intact is the main maintenance task. Gutters should be kept clear so water drains freely from the roof surface. On steel products, any area where the finish has been scratched or abraded down to bare metal should be touched up promptly to prevent rust from establishing. Beyond that, a properly installed metal roof requires no painting, sealing, or regular servicing. The 50-year service life expectation on standing seam and metal shingle products reflects this low maintenance demand.

Yes — and this is one of the most common applications we handle throughout the service area. Many homes have a primary steep-slope roof alongside low-slope additions, bay windows, dormers, or sunroom covers where a shingle product isn’t the right specification. Metal on the low-slope sections and shingles on the main field is a well-established and practical combination, provided the transition between the two systems is properly detailed and integrated. Getting that transition right — flashing, drainage, and the interface between the two materials — is where most problems on mixed-system roofs originate, and it’s what we address as a primary detail on every mixed project.