Metal Roof vs Shingles: Why Metal Has the Upper Hand Every Time

Metal roofed home in Montana spring weather

Are you pondering the age-old question of whether to choose a sturdy metal roof or classic shingles for your property? Then you’re in the right place. We’re diving headfirst into the debate between these two roofing giants. After hearing both sides of the story, you’ll see for yourself why, in the end, metal roofing wins hands-down.

In the rugged beauty of Montana, the elements can throw just about anything our way. So, choosing the right roofing for your family’s home or commercial property is no small decision. That’s why we’re here to shed some much-needed light on the metal roof vs shingles conversation. Whether you’re a business owner looking to replace your building’s roof or building your dream home from the ground up, we’ve got you covered.

In this blog, we’ll walk you through the undeniable advantages of opting for a durable metal roof over traditional shingles. From longevity to energy efficiency to style, we’ll explore why metal, fittingly, has the high ground in the roofing world.

Factors to Consider When Comparing a Metal Roof vs Shingles

1. Durability

Renowned for its resilience, metal roofing stands up against the elements and the natural wear and tear of time—perfect for Montana’s climate. Metal panels maintain their structural integrity even in the face of our notorious winter conditions. Hail, ice storms, strong winds, and heavy snowfall don’t faze metal roofs. Additionally, metal roofs excel at retaining heat in colder conditions, keeping interiors cozy and reducing heating costs. Their efficient snow shedding also prevents the buildup of heavy snow loads that can compromise insulation. Overall, metal roofs are a reliable choice for climates with cold weather.

Also, in the heat of our intense summers, metal roofs offer excellent heat reflection properties. Contrary to common misconceptions, metal roofs do not attract heat but instead deflect most of the sun’s rays. Metal roofs can stay up to 100 degrees cooler than asphalt roofs. Bonus, metal roofs are highly-fire resistant, able to withstand fire longer than shingles without contributing to its spread or losing structural integrity. This often provides Montana property owners with a lot of peace of mind, given our wildfire-prone landscape.

Asphalt shingles have a hard time holding up to the extremes of Montana’s climate. Our frigid winters can cause shingles to become brittle, increasing the risk of cracks. This vulnerability can result in leaks and water seepage as snow and ice melt on the roof.

In our intense summers, shingles fail to stand up to the weather, as well. Unlike metal panels, asphalt shingles absorb rather than reflect heat. This heat transfers into buildings and can elevate indoor temperatures by up to 25 degrees. Additionally, shingles often weaken, curl, and crack under sun exposure, diminishing their ability to shield buildings from the weather.

Want to learn more about the metal roof vs shingles debate in hot or cold climates? Visit our blogs “Metal Roof vs Shingles in Hot Climates” and “Metal Roofs vs. Shingles in Cold Climates: Why Metal Roofs Reign Supreme.”

2. Longevity

Metal roofing’s durability plays into its quality of being long-lasting. On average, metal roofs last around 50 years before a replacement is needed, which is a 3-6 times longer lifespan than asphalt shingles. With metal roofing panels, you don’t have to worry about frequent repairs or replacing the panels after a rough bout of wind or snow. Metal roofs typically carry a manufacturer’s warranty of around 30-50 years, though they often last much longer. Because of its longevity, installing metal panels is an incredibly cost-effective roofing choice.

Asphalt shingles don’t last nearly as long as metal roof panels. Because they are made of layers of asphalt and granules, they wear down over time from exposure to the elements. Sunlight, changing weather, and moisture can cause shingles to degrade far faster than metal panels. Damage to shingles can include curling, cracking, and loss of granules. Because of this, asphalt shingles often need more repairs and replacements, making them less reliable in the long run and more costly than metal roofing.

3. Energy Efficiency & Eco-Friendliness

Metal roofing is highly energy-efficient because of how it’s installed and its materials. The U.S. Department of Energy discovered that the way metal roofing is attached allows for airflow underneath, which acts as insulation in winter and keeps heat from transferring in summer. With a metal roof, cooling costs can drop by 25%. Plus, if you choose pre-painted or solar reflective-coated metal roofing, you can boost this effect for even better energy efficiency. Picking a lighter color for your metal roof also helps—it reflects more heat than darker colors, lowering your energy bills during warmer months. Even without paint, metal roofs reflect heat better than asphalt shingles. In terms of materials, metal roofs are made from clean products and are 100% recyclable, with some steel roofs containing at least 25% recycled material.

In comparison, shingle roofs are known for their higher levels of pollution, waste, and lower energy efficiency. Asphalt shingle roofing projects can use hundreds of gallons of oil throughout the process, leading to unnecessary waste. Also, asphalt shingle roofs can contain harmful chemicals such as polycyclic aromatic hydrocarbons (PAHs) and arsenic. Both can pose risks to both human health and the environment. Additionally, the longevity of a roof is crucial for its energy efficiency. Shingle roofs only last around 20 years, requiring continual maintenance. Shingle roofs’ shorter lifespans results in increased long-term waste.

4. Aesthetic Appeal

Metal roofing is not only incredibly practical but sleek and stylish, as well. Metal roofing can be easily customized to your preferences, HOA needs, or architectural specs. Metal panels come in a wide range of paint options, allowing you to select a color that complements the style and look of your building. Along with the color, there is a wide assortment of panel profiles to choose from to fit your project’s aesthetic. Whether you favor the rustic feel of corrugated panels or the clean versatility of tuf rib panels, you can easily match your panel choice to your desired overall “look” for your property.

Asphalt shingles are less flexible in terms of appearance compared to metal roofing panels. They typically come in a limited range of colors and styles, which can restrict your options for matching the look of your home or building. This limited variety may result in a roof that appears uniform and less dynamic in appearance.

5. Maintenance

Caring for your steel metal roof is surprisingly low-maintenance. General maintenance includes using a gentle soap and water mixture to wash off any dirt from panels and clearing snow and leaves from the roof. For maximum protection, remember to recoat it every five to ten years with a fresh metal roof finish for longevity.

Unlike metal panels, asphalt shingles demand regular maintenance to combat issues such as curling, cracking, and granule loss due to sun exposure. Additionally, they need periodic resealing to prevent leaks, making them more prone to damage from weather elements over time. These maintenance requirements can result in higher long-term costs and more frequent repairs compared to the sturdy, low-maintenance nature of metal roofs.

Invest in the Best Option for Roofing: Metal’s Where It’s At

If you have specific questions about the metal roof vs single debate or which material is most fitting for your next residential or commercial metal roofing project, we’re here to help. At Great Northern Metal Company, our metal roofing and siding experts can make insightful recommendations to ensure you have all the information you need to increase your project’s long-term value. Get a quote today or give us a call at (406) 624-0435—we’d be happy to answer any questions!

 

What Is Sealant for Metal Roofing?

Metal roof sealant helps seal seams, joints, gaps, and other areas where water or air could enter a roofing system. Most gun-grade sealants are applied from a tube and form a bead over or within a joint. Depending on the formulation, the material may remain permanently pliable or cure into a flexible seal.

For metal roofing, flexibility matters. Panels naturally move as temperatures rise and fall, so a sealant used at a moving joint needs to accommodate that movement without losing adhesion. 

The location of the seal matters too. A product used at an exposed seam may need different properties than one placed inside a concealed joint.

Sealant also should not be treated as a substitute for proper flashing, fastening, or panel installation. It works as part of the roofing system, not as a fix for a detail that was built incorrectly.

What Is Butyl Tape for Metal Roofing?

Butyl tape is a preformed sealing material typically installed between two roofing components. Instead of applying a bead from a tube, the installer lays a continuous strip of tape along the joint before the materials are fastened together. That makes it especially useful at concealed laps and other locations where two metal surfaces come together.

Butyl stays flexible, which helps it maintain a seal as a metal building experiences normal movement. There are also expanding sealant tapes that serve a similar purpose while filling irregular gaps and accommodating movement within the joint.

Sealant vs. Butyl Tape

The simplest way to think about the difference is application.

Gun-grade sealant works well when you need to apply a bead into a seam, joint, or gap. Butyl tape works well when you need a continuous seal between overlapping or adjoining components.

One is not automatically better than the other. The roof detail determines which type makes sense.

Metal Roof Sealant vs. Butyl Tape: Which Should You Use?

Different roof details put different demands on the sealing product.

Application

Product Type to Consider

Filling a seam or joint

Gun-grade sealant

Sealing a concealed metal lap

Butyl tape

Joint that moves with expansion and contraction

Flexible sealant or expanding sealant tape

Continuous seal between two components

Butyl tape

Irregular gap that needs to be filled

Gun-grade sealant or expanding tape

Detail exposed to wide temperature changes

Product rated for the expected temperature range

These are general guidelines. Always check the roofing-system requirements and the manufacturer’s installation instructions before choosing a product.

4 of the Top Metal Roof Sealants and Butyl Tapes

The right product depends on the joint, expected movement, temperature conditions, and whether the seal will be exposed or concealed.

Here are four options GNMC has tried, tested, and trusts so much that we chose to carry them at our shop.

1. EMSEAL AST Hi-Acrylic Sealant Tape

Best for: Expansion joints, lap seams, and joints that need to accommodate movement.

EMSEAL AST Hi-Acrylic Sealant Tape is a self-adhering, open-cell polyurethane foam tape impregnated with acrylic-modified asphalt.

Unlike a standard flat tape, EMSEAL AST gradually expands after it is removed from its packaging. That allows it to conform to the joint and fill gaps along irregular surfaces. For metal roofing and metal buildings, that can be particularly useful around details affected by thermal expansion and contraction.

Emseal AST

Why It Works Well With Metal Roofing

One of EMSEAL AST’s biggest advantages is its ability to move with the building. The tape conforms to contours and maintains a seal as metal panels expand and contract. It is designed to help keep out dust, air, wind-driven snow, and moisture through joint details.

It also does not dry out and become hard or brittle over time. Because the material remains compressed within the joint, it is designed to stay in place rather than squeeze out the way some caulks or butyl products can.

Its resistance to UV exposure, aging, and mildew also makes it well suited to demanding exterior applications.

Common Applications

EMSEAL AST can be useful for:

  • Expansion and compression joints
  • Lap seams
  • Mechanically fastened joints
  • Irregular gaps
  • Metal building details where movement needs to be accommodated

It can also be used alongside several common building materials, including metal, plastic, wood, and concrete.

Interested in EMSEAL AST? Contact GNMC

2. TFC BUTYL™ Sealant

Best for: Metal panel joints that need a permanently pliable, gun-grade sealant.

TFC BUTYL™ is a single-component butyl-based sealant designed specifically for strong adhesion to metal panels.

Its biggest distinction is that it remains permanently pliable. It does not skin over into a hard surface, which allows the material to continue moving with the joint after installation.

Why It Works Well With Metal Roofing

Metal panels do not stay perfectly still over the life of a building. Temperature changes create movement, and joints need a sealing product that can handle it.

TFC BUTYL remains flexible and moisture-resistant, which makes it useful for metal panel details where a rigid sealant would not be appropriate.

It also meets or exceeds AAMA 809.2 and is available in gray or white.

Installation Matters

Good adhesion starts with a clean surface. Before applying TFC BUTYL, the substrate should be dry and free from frost, oil, grease, incompatible coatings, or other contaminants that could interfere with adhesion.

The product is applied using a standard caulking gun and can be tooled after application if needed.

It is also worth paying attention to storage. TFC BUTYL should be kept in a controlled, dry environment below 75°F and used within 12 months of manufacture.

One other detail to know before choosing it: TFC BUTYL is not paintable.

Ask GNMC about TFC BUTYL™.

3. NovaFlex Metal Roof & Panel Adhesive Sealant

Best for: Seams, panel joints, and gaps that need a flexible cured sealant.

NovaFlex Metal Roof & Panel Adhesive Sealant is a single-component silicone sealant and adhesive commonly used as a seam sealant or joint filler in metal roofing and panel systems.

It is non-corrosive and non-sag, making it useful where contractors need a gun-grade product that will stay where it is placed.

Why It Works Well With Metal Roofing

Temperature range is one of NovaFlex’s standout characteristics. The product can be applied at temperatures from -20°F to 160°F and has a service temperature range of -40°F to 400°F.

That broad range is useful for metal roofing, where surfaces can experience substantial temperature swings.

NovaFlex also offers good adhesion to common building materials and can bridge gaps up to 3/8 inch. Its exterior weathering and aging performance make it suited to exposed building applications.

Where NovaFlex Makes Sense

Contractors may consider NovaFlex for:

  • Metal roof seams
  • Panel joints
  • Joint filling
  • Small gaps
  • Details exposed to wide temperature swings

It remains flexible at temperatures down to -10°F and is freeze-thaw stable. There are a couple of limitations worth knowing before installation. NovaFlex is not recommended for joints that will be submerged underwater, and it should not be used on surfaces that will later be painted.

Cure time also depends on temperature and humidity, so installers should account for site conditions and follow the product instructions.

Contact GNMC about product availability.

4. MB-10A Butyl Tape

Best for: Concealed metal building joints that need a continuous, flexible seal.

MB-10A Butyl Tape is an elastomeric butyl rubber sealant specifically designed around the requirements of metal buildings.

It comes extruded on silicone-coated release paper, which makes it straightforward to position during installation. It is also produced in different sizes and lengths to suit a range of applications.

Why It Works Well With Metal Roofing

MB-10A is designed to maintain its seal through normal building movement. Its combination of adhesive strength and cohesive strength helps the tape stay together and stay bonded as the assembly moves.

Temperature performance is another important benefit. MB-10A is designed to withstand extreme roof temperatures while maintaining compressibility in colder conditions. It also offers resistance to UV light and cold flow.

Those characteristics matter on metal buildings, where the material may experience a wide range of temperatures throughout the year.

Common Applications

MB-10A may be a good fit for:

  • Concealed panel laps
  • Metal building joints
  • Overlapping components
  • Details requiring a continuous butyl seal
  • Joints affected by normal building movement

Choosing the right tape size is important. The joint needs enough material to create the intended seal without using so much that the tape squeezes excessively out of the detail.

Inquire about MB-10A Butyl Tape

What to Consider Before Choosing a Metal Roof Sealant

Before grabbing a tube or roll, look at what the joint actually needs and ask yourself the following questions:

    1. How Much Will the Joint Move? Metal panels expand and contract as temperatures change. A sealing product at a moving joint needs enough flexibility to accommodate that movement.
    2. What Temperatures Will the Product See? Metal roof surfaces can get hot, and Montana projects can also see very cold conditions. Check the product’s application temperature separately from its service temperature. A sealant may perform across a wide temperature range once cured while still having specific limits for installation.
    3. Is the Joint Exposed or Concealed? A concealed panel lap has different needs than an exposed seam. Butyl tape is often a practical choice where two materials are compressed together. A gun-grade sealant may make more sense when a seam or gap needs to be filled from the outside.
    4. What Materials Is the Product Touching? Always check compatibility with the metal substrate and any adjoining materials. A product that adheres well to bare metal may have different requirements around painted finishes, other coatings, plastics, or masonry.
    5. Will the Surface Be Painted? Some sealants are not paintable. Both TFC BUTYL and NovaFlex have limitations that should be understood before choosing them for a detail that will receive a finish later.
    6. What Does Installation Require? Good products still need good installation. Surface preparation, storage, bead size, compression, and cure time can all affect the finished seal. Read the product instructions before installation instead of assuming every sealant or tape works the same way.

Frequently Asked Questions About Metal Roof Sealants and Butyl Tape

What is the best sealant for a metal roof?

The best metal roof sealant depends on where it will be used. Gun-grade sealants can work well for seams and joints, while butyl tape is commonly used between overlapping components or in concealed joints. Movement, temperature, substrate compatibility, and exposure should all factor into the decision.

Is butyl tape good for metal roofing?

Yes. Butyl tape is well suited to many metal roofing details because it creates a continuous seal between components while remaining flexible enough to accommodate normal building movement.

Is sealant or butyl tape better for a metal roof?

Neither option is better for every application. Butyl tape is often used inside laps and concealed joints, while gun-grade sealants are useful for filling seams, joints, and gaps. Some details may use both as part of the roofing system.

Does metal roof sealant need to stay flexible?

For joints that experience movement, flexibility is important. Metal panels expand and contract as temperatures change, so the sealing product needs to accommodate the expected movement without losing adhesion.

Can you use any silicone sealant on a metal roof?

No. Use a sealant that is compatible with the roofing material, coating, joint design, and expected temperatures. The product instructions and roofing-system requirements should guide the choice.

Need Metal Roof Sealant or Butyl Tape for Your Next Project?

Great Northern Metal Company carries EMSEAL AST, TFC BUTYL™, NovaFlex, and MB-10A Butyl Tape for a range of metal roofing and metal building applications.

Tell our team what detail you are working on and what you need the product to do. We can help you review the options GNMC carries and get the right product information before you place an order.

Inquire About Metal Roof Sealants

Additional Resources

Guides and How-tos
4 Tried and Tested Metal Roof Sealants and Butyl Tapes

4 Tried and Tested Metal Roof Sealants and Butyl Tapes

A metal roof is only as watertight as its details. Seams, laps, joints, penetrations, and other connection points all create places where moisture can work its way into the roofing system if they are not sealed correctly. Metal also expands and contracts as...

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