Trusted Metal Roofing Suppliers in Bozeman and Southwest Montana

Contractor installing metal panel roof obtained from GNMC metal roofing supplier in Bozeman Montana
Finding the right metal roofing supplier near you can make a project easier from the start. Local access matters when you need clear communication, help sorting through material options, or a supplier that understands the kinds of projects being built in your area.

Great Northern Metal Company manufactures and supplies metal roofing and siding materials for projects across Southwest Montana. We work with contractors, builders, architects, property owners, and other project teams that need dependable access to metal panels and knowledgeable support throughout the ordering process.

If you are looking for metal roofing supplies in Southwest Montana, here is where GNMC serves, what you can source through our team, and how to get started.

Service Areas: Southwest Montana Metal Roofing and Siding

GNMC supports projects throughout Gallatin, Beaverhead, and Silver Bow counties, along with surrounding areas.

That includes everything from construction in growing communities to projects in mountain towns and agricultural areas. Each location comes with different project needs, which is why working with a Montana-based supplier can be helpful when you are comparing panel systems, finishes, trim, or other components.

Our primary service area includes communities throughout Southwest Montana, but the list below is not necessarily the limit of where we can help. If your project is outside one of these locations, contact our team with the jobsite location and project details so we can confirm your options.

You can also visit our Service Areas page for more information about the areas we serve.

Communities GNMC Serves

  • Bozeman
  • Belgrade
  • Three Forks
  • Manhattan
  • Big Sky
  • Livingston
  • Butte
  • Dillon
  • West Yellowstone
  • Helena
  • Townsend

Don’t See Your Community Listed?

Our primary service areas cover communities throughout Southwest Montana, but your project does not have to be in one of the cities listed above for it to be worth giving us a call.

If you are working elsewhere in the region, tell us where the project is located and what type of metal roofing or siding materials you need. Our team can confirm whether GNMC can support the job and walk you through the next steps.

What You Can Source From GNMC

A metal roofing project usually involves more than the panels themselves. GNMC helps customers source the components needed to put together the roofing or siding system.

Depending on the project, that may include:

Product availability can vary depending on the job, which is why it helps to talk through the project before placing an order.

If you know the profile, finish, or components you need, our team can help you take the next step. If you are still sorting through those decisions, we can help explain the available options and what may make sense for the application.

Who GNMC Works With

Different customers need different things from their metal roofing supplier. GNMC works with several types of customers throughout Southwest Montana.

Contractors and Builders

Contractors and builders often need a supplier who understands that material decisions affect the schedule and the rest of the job.

GNMC helps contractors coordinate roofing and siding panels, trim, and accessories while providing product knowledge when questions come up. Having a local team to call can also make it easier to work through details before they become issues on site.

Our goal is to help contractors get the information and materials they need to keep the project moving.

Architects and Project Teams

Architects may come to the conversation with a specific design intent, performance requirement, or finish in mind.

GNMC can help project teams understand available panel profiles, color and finish options, and other material considerations during the planning process. We give architects a local resource when they need more information about the metal products being considered for the project.

Property Owners and DIY Customers

Property owners and DIY customers may need more help understanding the differences between profiles, finishes, and order requirements.

Our team can explain the available material options and help customers understand what information they need before ordering. If you are buying metal roofing or siding for the first time, you do not have to figure out every product detail on your own.

Why Working With a Local Metal Roofing Supplier Matters

When you search for a “metal roofing supplier near me,” proximity is only part of what makes a local supplier useful.

Working with a Montana-based company gives you access to people who regularly work with metal roofing and siding projects in this region. That local experience can be useful when you are discussing project conditions, material choices, or the details of an order.

There is also a difference between talking with a company that specializes in metal roofing and siding and trying to get the same level of product guidance from a general building-material counter.

GNMC works with these materials every day. That gives our team practical product knowledge that can help customers understand the options in front of them and ask better questions before they commit to an order.

For Montana projects, having that resource nearby can make the planning process more straightforward.

How to Get Metal Roofing and Siding Supplies for Your Project

If you are ready to start planning an order, having a few project details available will make the conversation easier.

1. Tell Us Where the Project Is Located

Start with the jobsite location and a basic overview of the project. This helps our team understand where you are working and confirm whether we can support the project.

2. Share the Details You Already Know

If available, provide information such as the panel type, measurements, preferred color or finish, and anticipated timeline.
You do not need to have every detail figured out before calling. The information you do have simply gives us a better starting point.

3. Talk Through Trim and Accessories

Panels are only one part of the order. We can also discuss trim, accessories, and other supporting components needed for the roofing or siding system.

4. Request a Quote

Once the project details are clear, you can request a quote and confirm the next steps for receiving your materials.

Starting these conversations early gives everyone more time to work through the details before the project reaches the point where materials are needed on site.

Frequently Asked Questions

Does GNMC serve projects outside Bozeman?

Yes. GNMC serves customers throughout Southwest Montana, including Belgrade, Three Forks, Manhattan, Big Sky, Livingston, Butte, Dillon, West Yellowstone, and surrounding areas.

Does GNMC install metal roofing and siding?

No. GNMC manufactures and supplies metal roofing and siding materials. We work with contractors, builders, architects, property owners, and other project teams that need metal materials for their projects.

Who can buy metal roofing and siding from GNMC?

GNMC works with contractors and builders as well as architects, property owners, DIY customers, and other project teams that need metal roofing or siding materials.

What information should I have before requesting a quote?

Helpful information includes your project location, panel type, dimensions, preferred color or finish, trim needs, and expected timeline. If you do not have every detail yet, contact our team with what you know, and we can help you determine what else is needed.

Can GNMC help me choose a panel or finish?

Yes. Our team can answer questions about available panel profiles, colors, finishes, and accessories so you can better understand the options for your project.

Need Metal Roofing or Siding Supplies Near You?

Tell Great Northern Metal Company where your project is located and what materials you need. Our team can help you review panel options, supporting components, and the next steps for requesting a quote.

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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