Weathertightness Warranty Protection: A Comprehensive Commitment to Your Metal Construction Project

At MBCI, we understand that in the metal construction industry, a warranty is more than just a document – it’s a promise to support your project from start to finish. Our weathertightness warranty process is designed to ensure the success of your metal building systems through proactive planning, expert guidance, and ongoing support. Here’s how we deliver unmatched value to your metal roofing and wall panel projects.

 

Pre-Project Precision

Our commitment to your project begins long before the first metal panel is installed. During the pre-bid stage, we take a proactive approach to set your project up for success:

  • Careful Review of Project Specifications: We analyze your project’s unique requirements to ensure every detail is accounted for.
  • Thorough Geometry Reviews: We assess the design to identify potential challenges and provide solutions for metal roof systems.
  • Tailored Warranty Guidance: We help you choose the warranty option that best fits your project’s needs, whether for standing seam metal roofs or insulated metal panels.

Pre-Order Checklist

Before your order is finalized, we take additional steps to ensure everything is in place:

  • Final Drawing Reviews: We verify that all design details are accurate and complete.
  • Order Accuracy: We double-check that all necessary materials are included, reducing the need for last-minute orders.
  • Third-Party Supplies: We identify components from other suppliers so you can plan accordingly.

 

Warranty Options Designed for Your Metal Construction Project

We understand that every project is unique, which is why we offer multiple weathertightness warranty levels to meet your specific requirements.

Standard Warranty Options

  • Available in 5, 10, 15, and 20-year terms
  • Coverage for select metal panel profiles
  • Options with or without certified installer requirements

Single Source Warranty

For comprehensive protection, our Single Source Warranty includes:

  • Three Critical On-Site Inspections: Ensuring quality at every stage of
  • 5, 10, 15, and 20-year terms
  • Coverage for select metal panels
  • Reviews at project startup, mid-point, and completion
  • Certified installer requirements for maximum quality assurance

 

Dedicated Customer Support

At MBCI, we’re more than just a warranty provider – we’re your project partner. Our team is here to guide you through every step of the process:

  • Warranty Documentation Assistance: We simplify the paperwork so you can focus on your metal building project.
  • Expert Navigation of Warranty Requirements: We help you easily meet specifications based on the warranty type, whether for standing seam metal roofs or insulated metal panels.
  • Clear Communication: We keep you informed at every stage of the project.

 

Technical Expertise Throughout Your Metal Construction Project

Our warranty specialists are with you from start to finish, providing technical expertise to ensure your project’s success:

  • Drawing Reviews and Approvals: We verify that your project plans meet warranty requirements.
  • On-Site Inspections: Depending on your warranty coverage, we conduct multiple inspections to guide proper installation.
  • Detailed Reports and Recommendations: We highlight any concerns and offer solutions to optimize the performance.

 

Why Our Warranty Stands Out

What sets MBCI’s weathertightness warranty apart in the metal construction industry?

  • Personalized Project Management: Tailored support for your unique needs.
  • Proactive Quality Control: Inspections and reviews to catch issues early.
  • Comprehensive Documentation: Clear and thorough records for your peace of mind.
  • Transparent Communication: We keep you informed every step of the way.

 

Post-Installation Support

Our commitment doesn’t end when the project is complete. We provide:

  • Detailed Inspection Reports: Clear documentation of installation quality.
  • Warranty Maintenance Guidance: Tips to help you maintain warranty validity.
  • Ongoing Support: Assistance throughout your warranty period.

 

Certified Installer Training

Architectural metal building designs demand precise installation to maintain their integrity and performance. That’s why many architects now require manufacturer-certified installers.

MBCI, through the Cornerstone Building Brands Certification Program, offers comprehensive training to ensure installers are equipped with:

  • Proper installation techniques for metal roofing systems and wall panels
  • System-specific expertise for standing seam metal roofs and other metal panels
  • The knowledge to maximize product performance and meet architectural specifications

 

Partnering for Long-Term Success

At MBCI, we’re not just providing a warranty – we’re partnering with you to ensure your project’s long-term success. From pre-project planning to post-installation support, our weathertightness warranty process is designed to deliver peace of mind and exceptional results for your metal construction projects.

Ready to learn more? Contact our Project Sales team today to discuss your specific needs and discover how our warranty protection can benefit your next project.

 

Get Your Project Started Right: Keys to Successful Metal Building Estimates

In the world of metal building construction, estimating is a critical component of any successful project. At MBCI, we recognize the importance of providing accurate, timely, and professional estimates with comprehensive bids so that you know your exact cost and have the information you need to win the project. Our streamlined estimating process is designed to deliver precise quotes efficiently, helping to ensure your project’s success from the start.

Clarity Is Key: Providing Complete Project Details

Providing complete and detailed information is essential to receive the most efficient estimate for your project. Here are some key elements to include:

  • Detailed architectural drawings: These are crucial for understanding the scope and specifics of your project. They provide a visual representation that helps in planning and executing the construction process accurately.
  • Specify all desired products: Whether it’s roofing, walls, soffit, or fascia, be clear about what you need. This specificity helps avoid confusion and ensures that the right materials are used.
  • Indicate different product types: Clearly mark different product types for various building sections. This helps organize the construction process and ensures that each section is constructed with the appropriate materials.
  • Multiple buildings: If your project includes multiple buildings, be sure to document this information, as it impacts overall planning and resource allocation.
  • Special requirements or deadlines: Let us know of any unique needs or time constraints up front so we can tailor our services to meet your project needs.

What Our Estimating Team Delivers

Our estimating team is committed to providing comprehensive and detailed estimates, including:

  • Detailed product cost breakdowns: We provide a breakdown of costs for each product, helping you manage your budget effectively.
  • Color-coded architectural drawings: Visualize product placement easily. Our architectural drawings can help you understand where each product will be used, making the construction process smoother.
  • Accurate square footage and linear footage calculations: Ensure precise measurements for your project. Accurate calculations are crucial for ordering the right amount of materials and avoiding waste.
  • Complete material lists: We offer everything from major components to fasteners. This comprehensive list ensures that you have everything you need for your project.
  • Quick turnaround times: Our dedicated team’s efficient process ensures you get a complete bid based on your requested bid date.

Tools for Success

To facilitate a smooth estimating process, ensure you have the following:

  • Architectural drawings: Essential for accurate planning.
  • Clear Scope of Work: Define what needs to be done.
  • Project timeline/deadlines: Keep your project on schedule.
  • Product preferences: Specify any particular brands or types.
  • Special pricing requirements: If applicable, let us know about any pricing considerations.

Why Details Matter

The more complete the information we receive upfront, the faster we can process your estimate without interruptions or delays. This attention to detail helps us maintain our commitment to quick turnaround times and ensures you receive the accurate quote you need.

Our dedicated estimating team works closely with project coordinators and sales managers to address every detail. We understand the pressure of tight deadlines, and our streamlined process is designed to help you meet those challenges head-on.

Ready to get started? Contact your Project Coordinator today with your project details. We’re here to help make your next metal building project a success.

Properly Specifying Snow Retention Systems for Metal Roofs

The recent arctic blasts that hit the northeast brought to mind many things: hot cocoa, the evils of shoveling snow, a nice fire, the longing for a warm beach and, of course, how to properly specify snow retention systems on standing seam roofs. I’m not alone here, right?

All jokes aside, when I was scratching my brain for a new blog post, the cold weather and blizzards reminded me how easy it is to specify snow retention devices improperly. It might appear rather elementary at first; you might think it is as simple as planning for snow retention around entrances and frequent walkways. If so, you, along with many others, are mistaken. Let’s review some not-so-obvious areas to consider while planning a snow retention system for a standing seam metal roof.

Gutters

If a gutter is used that has a face high than the pan of the metal roof panels, the gutter must be protected from sliding ice and snow. Gutters are designed for one purpose – to channel the water to a downspout. If it is left unprotected it cannot resist sliding ice and snow.

Pipe penetrations

As ice and snow slides down a roof and encounters a pipe penetration, the force can cause the pipe to move down slope and damage the roof jack and the roof, or shear the pipe at the roof surface.

Upper roofs draining into lower roofs

The upper roof should have a snow retention system installed to prevent ice and snow from falling onto the roof below. Without snow retention, the sliding ice and snow can cause extensive damage to the roof membrane and to equipment on the lower roof.

Panel seams perpendicular to the main roof slope

Connector roofs or dormers are typical examples of this type of roof area. The main roof slope provides a surface for ice and snow to slide toward the eave. If it then encounters a roof surface that is perpendicular to this main slope, damage to the roof panels and trim on these roof areas can occur.

Valleys in high snow load areas

Valleys allow for snow to slide down a surface that is perpendicular to the panel seams. This offers the potential to bend panel seams down or shear them from the panel.

Aside from considering these areas while planning your snow retention system, also use clamps instead of screws to attach the system to the standing seams of the roof panels. Screws not only perforate roof panels but can also pin the roof and prevent it from floating as designed. Clamps, by comparison, have been tested and can be engineered for the specific roof to which they will be attached, allowing for the snow load, roof slope, panel run length and other details. These clamps do not penetrate the roof membrane, do not hinder roof expansion and are easily installed with a screw gun.

Final Recommendations

Lastly, I recommend having a registered, professional engineer design a retention system that meets the specified snow loads for the project. Without their expertise, there are possible repercussions. If the snow retention system cannot support the snow load, it can result in an entire system failure and major roof damage. This could potentially cause snow and ice to fall and hurt bystanders.

By keeping all of these in mind, along with proper installation and maintenance, a snow retention system will help your SSR survive winter blasts and protect pedestrians, too.

Looking Ahead: 2022 Trends at a Glance

Snow and Metal Panel Roofs: Part I

It’s February; winter storm Jonas happened last month. Snowstorms will continue to occur, and heavy snowfall can have many negative effects on roofs. What should you consider when designing a roof in snow areas, especially those with high snow amounts?

Rustic Trail Blog

What to Consider when Building Metal Roofs

Roofs on buildings in snow areas—from a structural capacity point of view—can be designed to be any low-slope or steep-slope roof system. Roof structures can be designed and built to accommodate any anticipated snow loads. From a weather-protection point of view, snow buildup on a roof can be problematic. The extra load and the risk of leaks are not desirable; however, keeping snow on a roof is often the acceptable way to deal with it.

Roof Slope

Unquestionably, the slope of the roof matters when it comes to snow staying on or sliding off. Once a roof slope gets to be about 45 degrees (i.e., 12:12), slope becomes the overriding factor for sliding snow. The amount of snow and the roof type also matter. From a designer’s perspective, there are also a number of localized issues to consider when designing for snow on roofs.

Snow Density

The amount and density of snow also matters. More snow means more weight. More weight means a greater sliding force down (along) the slope of the roof. On slopes less than 45 degrees (e.g., 6:12 to 9:12), a low coefficient of friction (such as on smooth pan metal panels) means less resistance to sliding. Striations and embossing add a small 3D profile and improve the resistance to sliding, especially if they run transverse to the slope.

When heavy, dense snow slides it can pack a punch. Such snow sliding down a roof can shear off exhaust vents; therefore, rigid vent pipes are needed, along with a secure method of attachment. Further, installing vent pipes as high up on the slope as possible reduces the amount of potential shear load. Consider the potential load on a vent pipe that’s 5 feet from the eave with a 40-50-foot eave-to-ridge length! Reverse that and most of the load goes away.

Roof Material Type

Material type and surface color make a difference, specifically a roof’s emissivity. Metal roofing absorbs heat more quickly and radiates heat more effectively than most other roofing materials. Darker colors enhance this effect. Even with as much as 3 to 5 inches of snow, UV light passes through it; less light passes the denser the snow. (The proof: solar energy panels [photovoltaics (PV)] work when covered in some snow.) This effect only happens on sunny days, and is most effective on south-facing roof areas. If there is heat loss from the building up through the roof, the heat will help melt the snow at the roof/snow interface. This creates a potential for sliding snow.

In part II of this blog, I’ll discuss the logic, experience and engineering that goes into designing a metal roof for snow. In the meantime, learn how to properly install snow retention devices, and watch how a New Jersey home heats and cools itself by gathering snow and rainwater.

Myths About Metal Roofing: Heat, Wind and Lightning

Properly detailed and installed metal roofing is one of the most resilient, lasting, efficient and attractive kinds of roofing systems for commercial and institutional buildings. Yet there are plenty of questions about metal roofing, and building teams often find time in project meetings to address the most common, recurring topics and myths.

Facts vs Myths About Metal Roofing

I call these “mythbuster meetings,” because many of the questions are fabrications – concerns arising from less savvy professionals or from competitive “selling points.” Among the most prevalent untruths:

Myth about Wind Uplift

Myth: Wind uplift affects metal roofing more than other roofing types.

Reality: While the noncontinuous nature of metal roof attachments makes them susceptible to wind uplift concerns, most roofing types are prone to similar effects. ASCE/SEI calculations for wind loading and FEMA studies of storm areas have shown that properly applied metal roofing outlasts other roof assemblies during hurricanes and tornados.

Building geometry affects how well the roof survives, regardless of roof type. Engineering determines how many insulation board fasteners are needed, and the optimal and safest distances between clips for standing seam systems at corners and perimeters, where the forces are greatest. The interlocking or “active fastening” helps metal roofing pass severe wind and uplift tests including ASTM E1592, UL 580 and UL 1897, and the Miami/Dade County codes, according to a report from Stanford University.

Myth about Heat

Myth: Metal panels get hotter and have more thermal bridging because metal conducts heat so well.

Reality: Depending upon the surface finish, metal roofing can “provide enhanced energy efficiency with its solar reflectance and infrared emittance properties […] to meet the climate requirements of the building,” according to the Stanford University paper and research highlighted by the Cool Metal Roofing Coalition.

As compared to other roofing types, metal roofing tends to be highly reflective and is available with high emissivity. Insulated metal roofing panels have foam insulation that delivers R-values up to R-8.515 per inch thickness and total roof U-factors that exceed those of many other roofing types, helping projects meet strict energy code rules.

Myth about Lightning

Myth: Metal roofs are more likely to get hit by lighting than any other roof types.

Reality: That is bunk; simply untrue. You can read my detailed blog on the subject, or for serious mythbusters refer to the Metal Construction Association’s Technical Bulletin MCA13a, which gives a full and authoritative overview.

As the MCA summarizes, “Because metal roofing is an electrical conductor and a noncombustible material, the risks associated with its use and behavior during a lightning event make it the most desirable construction available.” That’s right: The best option for lightning risks.

I hope some of the above information provided insight and assurance about building with metal roofs. If you have any additional questions or concerns, submit them here to our technical experts.

Part III – Transparency Plus Consensus: A Win-Win for Everyone

Part III transparency plus consensusIt has been a long time since my last blog on this subject. This is not only because I’ve been busy but also because the landscape of green building programs in general has changed significantly since Part II, and I wanted to wait to see how things shook out before I wrote something that might be immediately outdated. If you remember, we left off in Part II talking about how LEED, the most popular green building program in the US, has not been developed through an ANSI accredited consensus process. Furthermore, the resulting lack of transparency was dubiously ironic given that LEED demands a high level of transparency from building product manufacturers min the latest version of their program, LEED v4.

We also discussed the related but more general movement for manufacturers to fully disclose all of the ingredients in their products to a third party who then compares that list to lists of known hazardous substances and disclose any matches on a product label or public disclosure for all to see. This movement has been fueled by several large architecture firms sending letters to building product manufacturers threatening to stop specifying their products unless they participate. Although most manufactures agree that there is merit to disclosure and are anxious to participate in a fair program, they have not been privy to discussions regarding the logistics of such a program nor have they been allowed to participate in any kind of a standard development governing the disclosure process. This makes manufacturers reluctant to participate, given their vulnerability in such a situation. This risk is leveraged by the fact that currently the only standards that dictate the rules of such a program are under the control of consortiums who have little to no scientific expertise and, frankly, have not been friendly to the building products industry in the past.

I also mentioned that there are alternative programs to LEED that have been developed through a valid consensus process. Specifically, the International Green Construction Code (IgCC), ASHRAE 189.1 and Green Building Assessment Protocol for Commercial Buildings (also known as Green Globes) are ANSI standards that outline the relevant requirements for anyone to view. However, the USGBC marketing machine and resulting popularity of LEED prevented wide use of these standards. Thus, they remained largely unutilized. That is until this year, when the USGBC, IgCC and ASHRAE signed a Memorandum of Understanding, promising to work together and create a favorable consensus by eliminating duplication of provisions and assigning an area of responsibility for each group to maintain separately.

Although no documents have yet to be created, it appears that the administration and enforcement provisions of the new standard will come from the IgCC, and the technical content will come from ASHRAE 189.1, both of which are consensus based. Meanwhile, LEED will require compliance with 189.1 as a prerequisite to an upcoming interim version of LEED. This approach allows an Authority Having Jurisdiction (AHJ) to adopt the IgCC as a minimum standard of construction; dropping any reference to LEED they might currently have as minimum project requirements for all buildings. This leaves LEED to evolve as a completely voluntary program going forward and push the envelope of green building, which is their core mission. Meanwhile, Green Globes remains ANSI accredited and still exists as a commercial competitor to LEED. This environment should result in a more user friendly application process, the lack of which been a ubiquitous criticism of LEED for years, because Green Globes is much more user-oriented.

So, it appears that the most popular green building programs are poised to move in the
direction of a true consensus, which is fantastic news for everyone involved. However, the creation and development of disclosure programs, which will not be in the initial technical requirements provided by ASHRAE 189.1, remains largely a one-sided affair with no seat for manufacturers at the table. Besides the contentious nature of the subject in general, there are major philosophical questions that have to be addressed before Health Product Declarations (HPDs), or any type of disclosure in general, can be brought into the main stream. That subject is beyond the scope of this blog, but I encourage you to read a very good article on the trappings of HPDs called “Disclosure: The Newest Dimension of Green Building” by Jim Hoff.

The good news is that there may be a viable alternative to HPDs on the horizon. ASTM has a current open work item to develop a true consensus based standard guiding the issuance of a Product Transparency Declaration (PTD), which has much the same intent as an HPD. As discussed in Part I, the development of ASTM standards is a highly transparent process that allows everyone, including manufacturers, to come to the table. I encourage every designer to join ASTM and get involved in this process, especially those firms who participated in the letter writing campaign, and forgo HPDs until PTDs are available.

Yes, it will take a little longer; the reality that the development of consensus based standards takes time. But just like the development of the laws that govern this country, there is far too much risk involved in getting it wrong. Instead, having these standards developed by a consensus-based process is the only way the finished product will be truly useful and meaningful.

Top four reasons to attend trade shows

Trade Show BoothWith phone calls and emails growingly replacing client visits, I think it’s important not to lose sight of the benefits of face-to-face interactions in the business space. With METALCON, a trade show for metal construction products, technologies and solutions, less than a month away (October 14-16 to be exact), I thought it’d be relevant to discuss the top reasons why trade shows are productive for businesses and, specifically, why you should attend METALCON in Tampa, Florida, this year.

Not to jeopardize our audience, I would like to be forthcoming; as a title sponsor at METALCON we have vested interest in driving traffic to the show. That being said, we would not invest in a title sponsorship if we did not wholly support and value meeting and seeing our colleagues and customers in this forum.

  1. Educational opportunities. Although trade shows are widely known as a space for companies to display and educate audiences on their product line, they also provide additional educational offerings on industry challenges and trends. At METALCON, for instance, they offer an entire lineup of relevant courses taught by industry experts to help strengthen your business and two free Learning Zones that host brief, 15-minute sessions that cover topics on roofing details, field techniques and product applications. To view METALCON’s full course schedule, click here.
  1. Putting a face with a name. Trade shows are a forum for customers and sales representatives to interact directly and learn about one another. According to David Brock of Partners in Excellence, “When you know who the customer–the individual—is, what she looks like, what he’s responsible for, how our products help her do her job, the relationship changes.  It’s not a faceless entity, but an individual trying to do his or her job, trying to achieve their goals, trying to reach their dreams–and they need our products to do this.” This personalization deepens the business relationship and improves future communications.
  1. Network and exchange ideas. Aside from interacting with potential and current suppliers, trade shows welcome engagement between colleagues and business peers beyond the show floor. Receptions, such as METALCON’s 25th Anniversary event, frequently follow exhibiting hours daily and give attendees a more relaxed environment to meet others, exchange ideas and form business contacts. In a room full of individuals with shared interests, who knows what brilliant ideas might be born on the back of a cocktail napkin?
  1. Informed purchasing. 81 percent of trade show attendees have buying authority, according to the Center for Exhibition Industry Research. Trade shows bring the latest in product developments, technology advancements and industry trends to you. Housed in one location, attendees can compare the competition directly and formulate educated purchasing decisions based on their findings. With four out of five attendees seeking products or services, the takeaway could save time and provide clarity when selecting suppliers. Click here to view the full list of 252 exhibitors at METALCON.

If the above peaked your interest and you would like to attend METALCON for FREE as our guest click here to register and be automatically entered to win a prize at the show.

Design to Your Client’s Mindset

Spring Fire Department Station 78

As an architect, when did you last hear your client say, “Money is no object?”  This happens … almost never!  More likely what you hear is “I want high quality for low cost.”  The challenge of the architect is to provide your client with high quality at a reasonable and appropriate price.  A large part of finding that balance is determining the values, goals and long-term perspective of your client.

If a building owner wants a metal roof, it’s likely they already have a reason why.  Perhaps their existing roof didn’t provide the service life they expected it to, or it was damaged disproportionately.  Or the building owner understands that a metal roof can last a really long time.  Or they like the look of a metal panel or metal shingle roof, with all the colors and shapes available.  As an architect, it is important to determine your client’s mindset.  In the end, the question comes down to, “How long will you own this building (or home)?”  And, although less common, a building owner may just want to build a high-end, long-lasting building no matter their desired length of ownership.

The large part of the cost of a metal roof, similar to other roof types, is the labor to remove the existing roof and install the new one.   Upgrading from a 24-gauge metal to 22-gauge metal is a minimal increase in material costs that is easily justifiable for the long term.  Metal thickness, coating type and thickness, and penetration and edge details are the areas where upgrades and enhancements occur.

Argue against value engineering.  Roofs certainly can be out of sight, out of mind to most owners, but building owners who are considering metal roof systems understand the concept of life-cycle analysis, whether they know it or not.  Overtly reinforce their long-term outlook to help ensure that high-end penetration details and edge details are designed and installed.  Look to the industry standards—SMACNA, NRCA—for details that will last the life of the metal panels.  Realize that metal panels don’t leak; joinery and flashings are the potential leak locations.  Upgrade the details to be of the highest quality.

Understanding the mindset of your client is critical to determining the level of design.  This is definitely a cost issue.  The “university” client thinks long term; the “developer” client thinks short term.  However, there is much middle ground that requires inquisitive discussion with an owner to determine his/her goals.  Ask the questions, and design a metal roof based on your client’s mindset.

Fall Maintenance for Metal Roofs

Yes, it is still summer, but it is not too early to start thinking about fall maintenance.  The sooner you contact your network of building owners, the sooner you’ll be able to schedule and get paid for performing maintenance this fall. MBCI's Stormproof Panel

Do You Have Maintenance Agreements in Place?

Let’s take a step back. Why don’t you have a maintenance agreement in place for every roof you’ve installed?  Think “car dealer” for a minute.  When you buy a brand new car at a dealership, you’re basically expected to get it serviced there for the life of the car, or at least while the warranty is in effect.  Car dealers have the knowledge and expertise, and car owners rely on that expertise.  It’s the same idea for metal roofing.  As the installer (and perhaps designer) of a complex, highly engineered metal panel roof system, you are uniquely qualified with the knowledge and experience to provide semi-annual maintenance and inspection.

How Often Should You Service a Metal Roof?

The roofing industry continues to extol the virtues of semi-annual maintenance.  Even though roofs don’t have moving parts (like an elevator or an AC unit), a roof moves because it expands and contracts with temperature changes.  This movement puts stresses on all seams and joints.  High winds induce significant stresses at seams and fasteners, too.  Debris can collect on the rooftop and in gutters.  Fasteners and seams can become loose or damaged.  Regular maintenance can correct these minor issues before they become major issues.  Regular maintenance can also find potential warranty issues, such as a paint or coating issue.

Start Setting Up Service Contracts

Because fall is around the corner, it’s time to start contacting your network of building owners to set up a service contract.  Some companies may take a couple months to approve a service agreement, so an early start matters.  A service agreement should define the parties involved, the services included, and the fees.  Fees can be based on the square footage of the rooftop, and perhaps can include travel time and mileage expenses.  Service agreements can be a one-time contract, or, preferably, a multi-year contract, with annual increases included.  To help sell a service agreement, let your clients know that most, if not all, manufacturers’ roof warranties require annual maintenance.  If you don’t have a service agreement form for your company, many examples of “roof system service contract” can be found with a Google search.

There may not always be opportunities to install new metal roofs, but there will always be opportunities to service existing metal roofs—twice a year for every metal roof.

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