Why Architects Choose Great Northern Metal Company for Metal Roofing and Siding

Brick column and metal roof and siding building with metal supplied by metal roofing and siding supply company

Metal roofing and siding can carry a lot of visual weight in a building design. Panel profile, finish, color, seam orientation, and custom trim details all affect how the finished project comes together.

That makes the supplier an important resource well before materials are ordered.

For architects, choosing the right metal roofing supply company can make it easier to understand what is available, compare material options, and work through product questions before you make your way into final drawings and specifications.

Great Northern Metal Company works with architects and project teams across Montana to help make that process more straightforward. Our team understands metal roofing and siding products, knows the options available, and can help your team make informed material decisions as a project takes shape.

Here’s why architects choose GNMC for expertise every time:

You Need a Partner, Not Just a Supplier

By the time a metal roofing or siding package is ready to order, many important decisions have already been made.

You may have selected a panel profile, identified a finish, established the visual direction, and incorporated details into the construction documents. If one of those selections turns out to be unavailable or poorly suited to the application, changing course later can affect more than the material order.

It helps to involve a knowledgeable metal roofing supply company earlier in the process who can partner their expertise with you on your project, not just supply materials.

GNMC can help architects understand available products while the design is still developing. That might mean reviewing panel options, comparing finishes, or clarifying what is available for a particular application.

Those conversations give you better information before a product gets too far into the specification process.

Support Great Northern Metal Company Gives Architects

1. A Strong Selection of Panels, Profiles, Colors, and Finishes

Metal gives architecture projects a lot of design flexibility, but only if you understand the options available.

Panel profiles can create very different appearances across a roof or wall. Color and finish affect how the material works with the rest of the building. Trim details can influence how cleanly the final design comes together.

A good metal panel supplier should help architects sort through those options without turning the conversation into a product catalog.

GNMC offers metal roofing and siding panels in a variety of profiles, colors, and finishes, along with trim and supporting accessories. Our team can help you compare available options based on what the project is trying to accomplish.

This is especially useful when the design calls for a particular appearance, but there is flexibility in how to achieve it. Understanding the available materials early gives you more room to make informed choices before the specification is finalized.

2. Product Knowledge That Makes Specifications Easier

A specification is only as useful as the product information behind it.

Architects need accurate answers when they are evaluating a metal roofing or siding system. That may include questions about available profiles, finish options, supporting components, or whether a particular product makes sense for the intended application.

This is where experience matters.

GNMC’s team has decades of experience working with metal roofing and siding. We can help clarify product differences and explain available options in practical terms. The goal is to give you useful information you can apply to the project. Advice based on experience can help reduce the risk of specifying a product that becomes difficult to source later or discovering that a selected finish does not work the way the design team expected.

Want our team’s top five tips for speccing metal roofing projects right the first time? Check out our resource.

3. Support During Design and Specification

The best time to resolve a material question is usually before the drawings are complete.

Working with a metal roofing supply company during design gives you another resource when you need to confirm product information or explore alternatives.

GNMC can help architects review:

  • Panel profiles and available applications
  • Color and finish options
  • Trim and accessory considerations
  • Product availability for the proposed project

Our role is to provide product knowledge that supports any architect’s decision-making. We are not replacing the architect, engineer, or other design professionals involved in the project. Instead, we help make sure the material conversation is based on what is actually available and appropriate for the application being considered.

4. Materials That Support Design Intent

Metal roofing and siding define a building’s appearance.

A narrow standing seam creates a different visual effect than a wider panel. A matte finish reads differently than a more reflective surface. Even small differences in color or profile can change how the material works with stone, wood, glazing, or other exterior elements.

Because of this, you should look beyond the basic product name when selecting metal.

Understanding how a panel profile will read across a large surface, how a finish may affect the overall appearance, and what trim options are available can help keep the finished project closer to the original design intent.

GNMC can help architects compare those choices before they become locked into the project. This can also be useful when a client comes in with a particular reference image or aesthetic in mind. Several options may get close to the desired look, and some may fit the actual project better than others.

5. Local Experience for Montana Projects

Montana projects come with conditions that designers elsewhere may not encounter as regularly. Mountain environments, changing weather, and the types of buildings common throughout the region can all influence material conversations.

Working with a Montana-based metal roofing supply company gives architects access to a team that regularly works with projects in the same communities and conditions.

GNMC serves projects throughout Southwest Montana and understands the kinds of roofing and siding applications common across the region. That regional familiarity gives you a nearby resource when you need to discuss material options for a Montana project.

It also makes it easier to have a practical conversation about what is commonly available and what other project teams in the area are using.

6. Clear Communication to Make Specification Easier

Architects often need answers while the design is still changing.

A client may change direction on a finish. A contractor may ask about an alternate panel. A detail may raise a question about available trim. Those situations become easier to handle when the supplier is accessible and understands the products well enough to give a clear response.

GNMC works directly with project teams to answer product questions and help clarify available options. That accessibility can keep relatively small material questions from turning into larger specification issues later. It also gives you a clear point of contact when you need information instead of trying to piece together answers from multiple product sheets or general building-material sources.

Questions to Ask Your Metal Roofing Supply Experts

Before specifying a metal roofing or siding system, it helps to have a clear conversation with your supplier. Here are some useful questions you could ask our team:

What panel profiles are available for this application?

Understanding the options early can help narrow the design direction and avoid specifying a panel that is difficult to source.

What colors and finishes are available?

Ask about the actual finish options available for the panel being considered rather than assuming every color is offered across every product.

Are there product limitations we should understand before finalizing the design?

Knowing those limitations early gives the design team more flexibility to make adjustments.

What trim and accessories are available with the system?

These components can affect both performance and the final appearance of the building.

Can you help confirm product availability for the project?

Availability is worth discussing before a specific material becomes a critical part of the design.

Are there warranty or system requirements we should account for early?

Some projects have warranties or requirements that affect more than the panels themselves. Identifying those considerations early can make the specification process easier.

Planning a Metal Roofing or Siding Project?

Bring Great Northern Metal Company into the conversation early.

Tell us what you are designing, where the project is located, and what you are considering for the roofing or siding system. Our team can help you review available panel profiles, finishes, and supporting components before the specification is finalized.

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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