durability Archives | ABC Metal Roofing

Benefits of Metal Panels for Agricultural Buildings

Posted on May 26, 2020May 31, 2023 by Joe Sample

Metal panels are ideal for agricultural buildings, including those that house livestock, such as cattle, hogs and poultry. They’re durable and offer flexibility in design so you can create an agricultural building that is functional and aesthetically pleasing. Read below to learn more about the benefits of choosing metal panels and special considerations for animal confinement.

Why do so many agricultural buildings use metal panels?

Durability: Metal panels are designed for durability. They can withstand high winds and heavy snowfall. They’re also hail resistant, featuring a class 4 rating. Unlike wood, metal panels are resistant to damage from termites and other insects. Metal is also noncombustible.
Longevity: Metal panels last three to four times longer—up to 60 years. Unlike corrugated fiberglass panels, metal doesn’t get brittle after years in the sun.
Cost Savings: Metal is a much more cost-effective material than wood because it doesn’t need to be replaced as often. The durable design of metal panels also saves money on maintenance.
Sustainability: Our metal panels are made from recycled materials. They’re also 100% recyclable at the end of your building’s life. Choose from a variety of cool roofing colors that are designed to reflect the sun’s heat instead of absorbing it into your agricultural building.
Ease of Installation: Metal panels can be cut to the nearest 1/4 of an inch for easy installation. Most panels offer three feet of coverage which is more time-efficient than pounding out shingles.
Design Flexibility: There are a variety of options to choose from when it comes to metal panels. We offer a broad selection of styles, profiles, colors and finishes.

The common panel profile used for this application is Imperial Rib® . It’s designed for durability with two minor ribs which give it strength. It’s also formed with a round top which pushes away moisture.

Metal Panels for Livestock Shelters

Animal confinement imposes specific challenges on panels that aren’t required considerations for residential or commercial uses.

When considering metal panels for a barn or other animal enclosure, here is what you should keep in mind.

What makes animal housing such a challenge?

Animal waste has high ammonia content that can start to corrode metal in as little as five years. With roofs, this corrosion is fueled by airborne fumes; on walls, the culprit is manure or dirt lying against the panels for extended periods. You can minimize both problems with good ventilation and regular maintenance, including keeping the panels clean and immediately repairing any damage.

Important Considerations

Panel Coatings: More people are opting for Galvalume panels for their livestock housing projects than ever before. And while Galvanized panels perform better than Galvalume in high-ammonia environments such as hog confinement, Galvanized panels are susceptible to white rust (chalking) if exposed to water prior to installation, which is not an issue with Galvalume panels.

For this reason, many are pairing Galvalume panels with a protective, self-adhesive moisture barrier like ABC’s Drip Stop product, which is applied to the panel’s interior before it is roll-formed. This membrane absorbs moisture when relative humidity (RH) is high, and then releases it back into the atmosphere when the RH falls, thereby preventing the damaging moisture from directly touching the panels. For hog or cattle barns, where dirt and manure tend to pile up against walls, another protective option is to install a polycarbonate panel on the inside of the metal wall panel to reduce contact, making the metal panels easier to keep clean.

No matter which panel you choose, be sure you understand how the coating is measured to that you optimize the durability and long-term corrosion resistance. The best options are the G90 Galvanized or AZ55 Galvalume panels, which have been compared in this article.

Panel Thickness: The 29-gauge panel is most commonly used for animal confinement, but as mentioned in this article on metal panel gauges, nominal 29-gauge panels come in a range of actual thicknesses. For best results, look for one that’s at least .015 inches thick.
Design: The design of animal confinement structures is important and can have major impacts on the viability of the building. Dropped ceilings with sophisticated ventilation systems are said to increase efficiency and satisfy environmental run-off inspections, therefore maximizing return on investment. These structures can also be designed to help eliminate ammonia fumes and corrosion- common occurrences in buildings with poor air flow.
Warranty: As with any purchase, it’s important to check the warranty exclusions when selecting any kind of panel for your projects. For instance, the warranty on a Galvalume panel may not apply when it’s subjected to animal waste or other corrosives. Again, good ventilation and regular maintenance will minimize the chance of problems.

For more information on ABC’s agricultural products, visit our website or contact your local representative today.

What Makes a Metal Building Green?

Posted on February 19, 2020March 24, 2023 by Greg Hekman

Longevity, reduced material consumption and decreased energy usage are what determine if a structure is sustainable. A design-build contractor or builder should understand the metal building owner’s sustainability goals from the onset of the design phase.

In addition to protecting the environment, designing a sustainable building can save your company money through reduced energy costs and garner recognition through several certification programs including LEED®, Green Globes and the Living Building Challenge.

Metal buildings are a sustainable, or “green”, option from fabrication through the end of their lifespan. Here are some of the features of steel buildings that make them green:

Durability

One benefit of metal buildings is the exceptional durability of the building components including metal siding, roofing and framing . Compared to traditional building materials like lumber or shingles, steel is resistant to damage from the elements including severe weather, insects and even fire.

Rice Lumber’s retail store utilizes CF Flute insulated metal panels in slate gray. For the warhouse, PBR in 26-gauge slate gray were used for the wall and soffit panel, while and 7.2 Panel was selected under deck for the rubber roof.

This longevity means that there’s no need to consume additional resources to repair or replace your metal building for decades, contributing to its overall sustainability.

Reduced Impact at the Building Site

The benefits of metal buildings extend beyond the materials used. Since metal buildings are fabricated off site, there’s less disruption of the area surrounding the building. They can be erected quickly with less waste.

Decreased Temperatures in Urban Areas

Additionally, buildings featuring cool metal roofing panels can help reduce the heat-island effect. The heat-island effect refers to the increase in temperature created when dark and heat absorbing roofing materials are used. These roofing materials can raise the temperature of surrounding areas by as much as seven degrees. This excess heat can be detrimental to plants, trees and people in urban areas. Since cool metal roofing reflects heat instead of absorbing it, less heat is transmitted to the surrounding areas. This helps plants retain water and people remain more comfortable. This also translates to decreased energy usage and decreased greenhouse gas emissions from the electricity used for cooling buildings.

Improved Energy Efficiency

Metal buildings can also be designed for improved energy efficiency. Combine a variety of components such as insulated metal roof and wall panels and high-performance windows and doors to create an energy efficient building envelope. These components work together to create an effective thermal and vapor barrier, ultimately reducing energy consumption.

Further improve the energy efficiency of your metal building by choosing cool metal roofing. Since these panels reflect the sun’s rays, less heat is absorbed into the building itself. This helps to reduce heating and cooling costs.

Metal roofing panels are the perfect substrate for the installation of solar panels. Solar panels can be attached to a variety of metal panel styles. For standing seam metal roofing, solar panels can be clipped to the roof panel to avoid penetrating the substrate. This renewable energy source will help reduce your building’s carbon footprint and lower electricity costs.

Responsible Material Usage

When selecting sustainable materials for your building project, metal should be at the top of your list. Steel products contain a significant percentage of recycled material and are 100% recyclable at the end of the building’s life.

Since most metal buildings are prefabricated in shops, there’s less overall waste both at the job site and during fabrication. Any scrap materials that are created during fabrication can be recycled and reused.

Indoor Environmental Quality

One important component of sustainability is the interior performance of your building. This is achieved when the well-being of the building’s occupants is protected. Since metal building components are pre-finished off-site during fabrication, there are less harmful, volatile organic compounds released into the building.

Additionally, metal buildings offer flexibility of design, allowing for the incorporation of windows, doors and skylights throughout in order to provide natural light and exterior views. This has been shown to benefit building users.

How Insulated Metal Panels Enhance Building Design and Performance

Posted on January 3, 2020May 31, 2023 by Tyler Roose

Insulated metal panels can be a high-performing, aesthetically-pleasing solution for your customers’ building projects—particularly when the weather is colder. These lightweight panels feature an insulating foam core with a metal skin face and offer superior performance and design flexibility. This makes them the ideal choice for many building projects in many industries.

Enhanced Design Using Insulated Metal Panels

In addition to their functional responsibilities, Insulated Metal Panels also need to be aesthetically pleasing. Available in a variety of colors and profile shapes, they help meet the varying design requirements of your customers’ projects. Insulated metal panel finishes resembling traditional construction materials such as precast concrete, stucco, masonry and others are also available. This provides more customization and integration options for customers.

Flexibility and Code-Compliance

Insulated metal panels easily integrate with other building materials such as concrete tilt-up, stucco, brick, single-skin metal panels, glazing and exterior insulation and finish systems (EIFS). They also require less space for insulation to comply with energy codes as compared to other insulating methods. This helps to maximize enclosed space within your customers’ buildings.

Additionally, the use of insulated partition panels gives customers the flexibility to decide how much of their building they want to insulate. These interior panels can help section off portions of buildings that require temperature regulation like offices and storage space. Insulated partition panels can span floor to ceiling up to 20 ft., so in most cases no additional framing is needed for installation.

Strength and Savings

The strength of Insulated Metal Panels allows for greater spanning and load-bearing capabilities as compared to single-skin alternatives. With fewer required supports, these panels easily integrate into building designs without added cost.

And, of course, the advanced polyurethane core of Insulated Metal Panels can help reduce heating and cooling costs. This energy efficiency translates into savings for building owners across the life of the panels.

Superior Performance and Cost Savings of Insulated Metal Panels

Offering superior strength and durability across their lifecycle, Insulated Metal Panels are designed as a long-term building solution. Their consistent, all-in-one air and water barrier design makes them simple to install, which can expedite the project build and minimize schedule delays.

Minimal Maintenance Requirements

Needing minimal maintenance, Insulated Metal Panels help building owners save time and money, while delivering peace of mind their strength affords. Compared to some traditional materials, insulated metal panels are also easy to repair and replace. This reduces building material costs over time while also allowing flexibility for building expansion and remodeling down the line.

Putting it All Together

Superior design and performance make Insulated Metal Panels an efficient, effective, all-in-one solution for insulating metal buildings. Contact your local ABC sales representative today to learn more.

Cleaning Metal Panels Part 2: Quick Tips to Consider

Posted on September 26, 2019May 31, 2023 by Joe Sample

In a recent blog post, we reviewed how regularly cleaning metal panels helps maintain their integrity and aesthetics. Now that you know the importance of this activity, we’re sharing some tips for cleaning metal panels to consider.

LEVELS OF CLEANING METAL PANELS:

These tips for cleaning metal panels are based on general circumstances and get progressively more detailed for tougher jobs. They should not supersede and are not a replacement of the any metal panel manufacturer’s instructions or warranty requirements, including those provided by American Building Components.

Light Cleaning:

For simple cleaning, water and mild detergent is often sufficient. However, never use bleach, as it can change the finish color or interact disastrously with certain metals.

Moderate Cleaning:

For dirt or other deposits that can’t be removed with water alone and require a more complete cleaning, a solution of hot or cold water mixed with detergent is appropriate. An ideal solution is the mixture of 95 percent water with 5 percent of a mild, commonly-used, commercial (non-industrial, non-bleach) dish or laundry detergent added. Diluting the detergent with the water helps ensure the detergent isn’t too strong and doesn’t negatively affect the painted metal surface. Common cleaners for this type of cleaning can include:

Mild laundry detergent
Car wash soap
Mild dish soap
Cold or hot commercial/industrial detergents

Deep Cleaning:

For non-water-soluble residue such as tar, tree sap, grease, oil and adhesives, a solvent or alcohol-based cleaning solution may be required. In this case—since most organic solvents are flammable and/or toxic—handle these according to the cleaner and manufacturer instructions.

Generally, it’s advisable to keep them away from open flames, sparks and electrical motors. Use adequate ventilation, protective clothing and goggles, and—of course—read the manufacturer’s Material Safety Data Sheet (MSDS) for any solvent used for any other specific safety details.

Common cleaners for this type of non-water-soluble cleaning often include:

Alcohols:
- Denatured alcohol (ethanol)
- Isopropyl (rubbing alcohol)

Solvents:
- VM&P Naptha
- Mineral Spirits
- Kerosene
- Turpentine (wood/gum spirits)

WHAT TO AVOID WHEN CLEANING METAL PANELS:

It’s important to avoid using products and tools not recommended by the panel manufacturer that will scrape or grind down the surface coating and leave scratches or other finish damage when cleaning metal panels. This can eventually wear down the finish and leave panels vulnerable to corrosion. Likewise, any misuse or abuse of acceptable cleaning agents will likely automatically void any manufacturer’s warranty for the affected surfaces.

Regardless of the level of cleaning that needs to be done, there are some products and tools that are likely never ideal for use on coated metal panels. These include:

Wire brushes
Abrasives
Steel wool
Sandpaper
High-pressure power washers
Scouring powders
Paint removers
Paint thinners

In conclusion, while the considerations above can help give you and your customers an idea of options available when cleaning metal panels, the importance of understanding and following the specific product manufacturer’s metal panel cleaning instructions can’t be overstated. As a result of diligently following all official instructions and considering these tips, your customers can avoid panel corrosion, staining or other surface damage and retain the integrity and beauty of the metal panel finish.

To learn more about metal panel cleaning, finishes and warranties, contact your local ABC representative.

Cleaning Metal Panels – Part 1: Why it Matters

Posted on August 29, 2019May 31, 2023 by Marc Carolan

Metal roof and wall panels often feature long-lasting and durable finishes available in many colors. These finishes protect the panels and enable them to hold up and look great for decades. However, to maintain their durability and protective properties, cleaning metal panels should be done regularly throughout their service life.

THE IMPORTANCE OF REGULARLY CLEANING METAL PANELS:

Ensure Panel Longevity:

Dirt and residue left on metal panels can damage their protective coating and decrease the longevity of roof and/or wall systems. Likewise, bacteria and mold and mildew build-up can accelerate corrosion to the point where the structural integrity of the panels is compromised.

Protect Panel Appearance:

Stains and algae/lime deposits left on panels for long periods of time can degrade the roof finish to the point where it must be re-coated. Note: re-coating should only be considered if the panels are still structurally sound and doing so wouldn’t void the manufacturer warranty.

Control Energy Costs:

Dirty roof panels can inhibit a roof’s ability to expel heat from a building. If the heat isn’t able to escape through the roof, it can require increases in energy costs to keep the building cool.

HOW OFTEN DO METAL PANELS NEED CLEANING?

An annual cleaning helps keep your metal panels free of tree and animal debris, moss, fungus and other finish-jeopardizing elements. Deep cleaning metal panels only typically needs to be done every 3-5 years, depending on the building conditions and location. This type of cleaning uses stronger detergents that cut through some of the toughest dirt and grime that annual cleans can miss. This includes substances such as tree sap, oxidation and other hard-to-remove substances that often collect on panel surfaces. You may also consider moderate cleaning following weather events and seasonal allergen build-up.

WHO SHOULD CLEAN METAL PANELS?

Above all, follow the panel manufacturer’s recommendations when it comes to selecting who will perform panel cleaning on your building. Before you attempt to clean your metal panels yourself, be sure the product manufacturer recommends it and doing so doesn’t void any warranties.

A professional building surface cleaning company can be helpful as working on top of buildings can pose real safety risks. Your metal panel manufacturer may be able to recommend cleaning professionals who are familiar with their products and warranty requirements, and are practiced in using the correct cleaning solutions and techniques necessary to preserve your metal panels.

THE IMPORTANCE OF FOLLOWING MANUFACTURER MAINTENANCE INSTRUCTIONS:

Metal panel manufacturers usually provide maintenance and cleaning instructions specific to their products, which should always be followed. Manufacturers know the composition of their products and, therefore, which chemical cleaning solutions and techniques are ideal and which will degrade the panels. Neglecting to clean them—or doing so improperly—can compromise the integrity of the finish. Not only can this threaten the visual appeal of the panels, it can also put you at risk of voiding the panel warranty.

To learn more about the importance of cleaning metal panels, contact your local ABC representative or check out our blog post on metal panel maintenance.

Metal Roofing & Hurricane Season Part 2: Tips to Help Your Customers Protect Their Metal Roof

Posted on July 9, 2019May 31, 2023 by Tyler Roose

As with any kind of roof, proper maintenance is integral to protecting against hurricane damage. In part 1 of this series, we reviewed how choosing metal roofing can help prevent wind damage to homes and businesses. And while choosing metal panels as a roofing solution is the first step to damage prevention and increasing roof longevity, there are additional precautions your customers can take to protect their investment.

Professional inspection

Prevention is key. To maintain the strength and durability of metal roofs, your customers should have a licensed metal roofing professional inspect it regularly. While your customers can manually inspect their roof themselves, a qualified roofing inspector can thoroughly examine it, identify areas of concern and provide a detailed report including roof life expectancy, photos and repair estimates. Professional inspectors can also make hurricane preparedness recommendations based on your customer’s roof type.

Ensure all fasteners are secure

Fasteners are the key to preventing roof uplift as a result of high winds. Be certain the roof is properly fastened to the truss and that the correct fastener type, diameter, length and thickness are used. Consider the thickness of the panel, substrate and any other materials between the panel and truss to when selecting fastener length to ensure roof panels are secure. (Screws often need to be triple the length to accommodate the thickness of what’s being screwed down.) Additionally, although placement of fasteners may seem like a minor detail, screw pattern can actually be a major factor in a roof’s structural integrity. Be sure to follow the panels manufacturer’s instructions to the letter during installation.

Check for rust, loose screws and flaking paint

When rust develops on metal, it can accelerate degradation, compromising the integrity of your customer’s structure and leaving it vulnerable—particularly in inclement weather. While ABC offers Galvalume^® metal panels that prevent rust from occurring, standing water and heat from direct exposure to the sun can degrade this protection over time. Therefore, it is important that customers regularly check for rusty and loose screws as well as flaking paint which can also cause rust development. If rust is found, advise your customer to contact their roofing contractor for repair options.

Install hurricane straps

An added layer of protection from high winds, hurricane straps (or roof tie-downs) securely tie rafters to load-bearing walls. Made of galvanized metal, they can attach to most roof types, protecting it and the structure beneath. Hurricane straps can also help keep a roof from detaching and causing damage to nearby structures and objects. Many homes already have them (depending on how old the roof is), but even structures with hurricane straps should be checked to make sure they were installed properly.

Add roof reinforcements

Although most metal roofing is resistant to wind-related damage, adding reinforcements can decrease the likelihood of damage. This is particularly true if your customer’s building project is located in a hurricane-prone area. To reinforce their metal roof, your customers can add sturdy overlapping materials on top such as heavier metal panels or two-by-fours. A professional roofing contractor can advise your customer on the best reinforcement option for their structure.

Brace gable ends

Gable ends experience a lot of exposure to high winds, making them vulnerable to wind damage. If your customer’s structure has a gable end, they should ensure that it has been solidly built and appropriately braced.

Trim your trees

Trees that hang over your customer’s roof can be dangerous any time of year, but particularly during a hurricane. Falling tree limbs can cause severe roof damage, allow water into the structure, cause electrical issues or even injure someone inside. Trimming trees to is an easy way to prevent damage and injury.

Perform an interior inspection

If your customer is experiencing issues with their roof, chances are that they will also see damage inside their structure. Your customers should be aware of any spots, stains, peeling paint and daylight seeping in. These are all serious indicators of a compromised roof and should be addressed immediately.

Secure the Yard

Unsecured items around your customers’ property can become a major threat to your customer’s home or business during a hurricane. With strong winds, patio furniture, trampolines, grills and even potted plants can become dangerous projectiles. If these objects strike your customers roof, they could cause severe damage. Customers should move small items inside and secure larger items with rope or zip ties.

Choosing metal panels as a roofing solution is the first step to preventing building damage during hurricane season. There are, however, extra precautions your customers can take to prevent damage and protect their investment.

For additional information on metal roof performance during hurricane season, read part one of our blog series. For additional tips on how to storm-proof your roof, reach out to your local ABC representative today.

Quote and order metal building products anytime, anywhere and from any device using our online ordering tool. If you don’t already have an account, register for access today!

Note: This post was updated from a previously-published version.

Metal Roofing and Hurricane Season Part 1: Securing the Roof

Posted on June 11, 2019May 31, 2023 by Marc Carolan

For customers who live and work in coastal areas, preparing for hurricane season is vital. This preparation helps mitigate the risks and damage tropical storms can cause to their homes and businesses. Most hurricane-preparedness tips include making a hurricane emergency kit, reviewing insurance policies and outlining family emergency and evacuation plans. While these are all important activities, there are few that focus on the impact roofing material can have on the safety and security of your customers and their property. In this two-part blog series, we’ll evaluate the performance of metal roofing in coastal areas and provide practical tips to help your customers protect their assets during storms.

First, we’ll review one of the most vulnerable parts of your customers’ structure: the roof. Roof cover damage accounts for most non-storm-surge-related insurance claims during a hurricane. Damage to this vital building element can be dangerous and devastating since even partial damage can leave the entire structure vulnerable to wind, water and other structure- and property-damaging elements. To help prevent these ill-effects, selecting a roof material that can stand up to tropical weather is essential.

Metal Roofing Performance in Coastal Communities

Metal roofing is made of interlocking panels that provide unique strength and durability. When properly installed, some can withstand abuse from hurricane-force winds up to 140-mph as well as wildfires, hailstorms and tornadoes. American Building Components (ABC) metal panels feature UL 580 Class 90 Wind Uplift Resistance, UL Class 4 Hail Impact Resistance and Class A Fire ratings to support this. Metal roofs also have fewer seams as compared to traditional asphalt shingle roofing. Fewer seams means fewer entry points for water that can soak attic insulation and cause ceiling collapse and other damage.

Many metal roofing panel profiles adhere to strict approval codes designed to prevent property loss and damage from high winds. One example is the Miami-Dade County Approval—one of the most stringent building codes in the industry. To help your customers meet these strict requirements, panels like ABC’s PBR and 5V Crimp profiles, as well as most insulated metal panels can be specified to qualify for Miami-Dade County-approval. To ensure your customers’ roof adheres to Miami-Dade standards, be sure that the panel meets guidelines for thickness and features a Miami-Dade approval sticker. Even if a Miami-Dade approved panel is used, if not installed properly using correct fasteners, it will not be effective. Remind your customers that the manufacturer’s installation instructions should provide all necessary details to ensure proper function and protection.

The True Savings of Metal Roofing

By choosing metal roofing, your customers can save money in the long run. Although other roofing options are cheaper up-front, customers who install metal panels benefit from their superior design and durability. This pays dividends in the form of lower maintenance costs and insurance premiums over the life of their metal roof. A properly-installed, thick-gauge metal roof can last up to 50 years. That’s more than double the lifespan of traditional asphalt shingle roofs many customers are familiar with. In addition, some manufacturers back the durability and lifespan of their metal roofing products with industry-leading warranties that provide peace-of-mind.

For tips on how to prevent roof damage during hurricane season, read part two of our ‘Metal Roof and Hurricane Season’ blog series. For additional information on how to storm-proof your roof, reach out to your local ABC representative today.

How to Prevent Ice Dams on Metal Roofs

Posted on January 10, 2019May 31, 2023 by Ken Buchinger

Those in areas prone to below-freezing temperatures are likely familiar with ice dams and the costly damage they can cause. With winter weather already upon us, it’s important to ensure your building is protected against the dangerous and expensive effects of ice dams.

What Causes Ice Dams to Develop?

Most ice dams are a result of building air barrier flaws. When warm indoor air escapes through a rooftop, it warms the roof sheathing. This rise in temperature melts the underside of the layer of snow on top. The melted snow then moves down the slope of the roof toward the eaves, where it freezes into ice. As this process continues, the ice thickens, resulting in ice dams. These obstructions can cause water to back up and form a reservoir that can damage ceilings.

How Can Ice Dams Be Prevented?

To prevent ice dams, follow these four steps:

Seal Air Leaks: Sealing air leaks between the warm building interior and the attic or ceiling is imperative to prevent increased sheathing temperatures that can lead to ice dams. If your roof leaks every winter, it’s likely that an air leak is to blame. And, getting a new roof is not likely to help—even if it features more ventilation. The simple way to determine if you have air leaks is to get into your attic and check. Leaks can likely be easily sealed with two-component polyurethane spray foam. And extending any exhaust fans that don’t reach outside can help adequately seal the structure.

Ensure Proper Insulation: Many buildings don’t have adequate insulation levels to prevent ice damming. Building codes based on your geographic location can help you determine how much insulation you need. If the structure’s design doesn’t allow for adequate insulation, we recommend installing as much closed-cell spray polyurethane foam as possible. If replacing your roof, you can also install additional rigid foam insulation on top of the existing roof sheathing before you install the new roof. When taking that approach, make sure all products used are compatible with your new roof and adhere to manufacturer’s recommendations. It’s also imperative that attic insulation completely covers the top plates of a building’s exterior walls.

Improve Ventilation: Improving ventilation alone will not prevent air leaks that cause ice damming and should never be your first or only defense. In fact, improving ventilation without sealing air leaks and installing adequate insulation can increase heating costs and make ice damming problems worse. Despite this, if combined with steps one and two above, addressing your roof ventilation can’t hurt. The best ventilation options include soffit and ridge vents. It’s important to remember that all attic ventilation systems require an insulation dam (blocking) between the trusses and ventilation baffles at the attic’s perimeter, facing the soffits, to maintain a ventilation channel from the soffit to the attic and protect against wind-wash.

Use Underlayment: Covering your roof sheathing with two or more layers of rubberized membrane underlayment is another protection method that is far less effective if not used in concert with steps one and two. To use properly, it should extend from roof eaves to a point that’s three feet higher than your exterior wall.

Additional measures like framing your roof with raised-heel trusses can also help prevent ice dams. Additionally, avoiding including valleys as well as gutters that are at or above the roofing plane is ideal. Taking these steps can help ensure people and property are safe from overhead dangers. This should be a priority when designing, installing and maintaining your metal roof.

For additional information on how metal roofs perform in winter weather, read part one and part two of our ‘Metal Roofs and Snow’ blog series. For additional tips on how to winter-proof your roof, reach out to a local ABC representative today.

Roofing and Snow: Everything You Need to Know – Part Two

Posted on November 13, 2018May 31, 2023 by Ken Buchinger

Additional considerations for working with metal panels in winter.

In part one of our series on metal roofing and snow, we covered five of the most important elements to consider when preparing structures for winter weather. In this post, we’ll review four more ways to prevent unexpected, costly damage of metal panels in winter.

Consider roof material and surface color

Metal roofs absorb heat quickly and radiate it effectively. Darker panel colors can enhance this solar absorption effect, which can save you money year-round. But because UV light can pass through 3-5 inches of snow, when combined with heat loss through the roof, it becomes more difficult for snow to stay solid. To minimize the chance of ice damming, you should ensure your roof system is properly sealed and insulated. If not, ice damming may occur and the melting and re-freezing of snow throughout the day can result in icy layers that promote snow sliding—no matter the roof material or color.

Review weathertightness factors

For low-sloped roofs (less than 3:12), it is especially important for panel seams to be watertight to prevent water (melted snow) from leaking into the structure. This can be problematic when snow gathers and stays on a roof. Architects, designers and specifiers, therefore, should consider using panels that have passed the ASTM 2140 water head test or FM 4471 Appendix G water test. Water-resistant underlayment should also be considered for all roof slopes.

A close-up of this dormer roof illustrates how the impact of sliding ice and snow can damage panel seams.

Consider your roof layout

Design elements like valleys and slope changes cause snow to collect and increases your snow load. Also, when dormers extend from a large roof area and one area is significantly bigger than the other, the structure is susceptible to experiencing unbalanced sliding snow. This imbalance can actually tear open standing seams and displace panels. Also consider that drifting snow may accumulate behind HVAC units, at perimeter walls, and behind solar and photovoltaic (PV) panels.

Ensure Proper Roof Maintenance

One of the best ways to prevent snow and ice issues is to regularly inspect and maintain your roof. In addition to cleaning and inspecting your roof for possible issues, properly removing standing snow and preventing ice dams is a vital part of avoiding damage to your metal panels in winter. This often requires that you get into your attic to inspect for air leaks—the leading cause of ice dams. Read more about how to properly maintain and remove snow from your roof in this blog post.

If an issue is discovered, consult your roofing material manufacturer for recommendations as well as advice on warranty claims. Additionally, you can reach out to a trusted roofing professional in your area. These professionals can thoroughly inspect your roof system to help you determine ways to rectify any potential issues. You’ll want to do this before damage and/or injury occurs and before you pay for sub-par or ineffective repairs.

If you missed part one of this series, click here for our top five considerations. These include managing snow load and sliding snow, preventing ice dams, using retention systems and more! For more information on how metal panels fare in winter weather conditions and for advice on how to winter-proof your roof, reach out to an ABC representative today.

Roofing and Snow: Everything You Need to Know – Part One

Posted on October 4, 2018May 31, 2023 by Ken Buchinger

What to consider when designing and building in snow-prone areas.

While properly-designed metal roofs historically perform well in winter, heavy snowfall can be detrimental to buildings of all kinds. Those who live and work in and around them are also at risk when snow and ice cause dangerous situations. Even though winter doesn’t formally begin until late December, colder weather is upon us. And while you might not be expecting snow or ice yet, keep these roofing and snow tips in mind when designing, constructing and maintaining structures in areas where there’s a chance for snow and/or ice over the course of the year.

Considerations for Snow-Bearing Roofs:

Anticipate Snow Load

Snow accumulates on every roof type, and as this happens, it increases the amount of weight your structure is bearing. This increased weight (snow load) can pose several threats to the structure and those in and around it. For example, when the weight of snow or ponded water from melted snow exceeds the structure’s limits, the roof or even the entire structure can collapse. Be sure you’re aware of the weight your structure can bear and remove snow to keep it within its limits. Consult the International Building Code (IBC) as well as state and local codes for guidance based on your location.

Prevent Ice Dams

Most ice dams are the result of air barrier flaws in buildings. If warm indoor air escapes through the roof floor, it warms the roof sheathing and melts the underside of the layer of snow on top. This water then moves down the slope of the roof toward the eaves, where it freezes into ice. As this process continues, the ice gets thicker and thicker, resulting in ice dams. The presence of these dams allow water to back up and form a reservoir that can cause major damage.

To prevent ice dams, you should:

Seal all air leaks at the attic floor
Ensure proper insulation
Provide adequate attic ventilation

Another tip is to use a peel and stick membrane on the roof deck extending from the eave to about 3’ up-slope from the exterior wall. For more specific details on the ice dam prevention tips above, read our recent blog post.

Prevent Sliding Snow

Gravity can cause accumulated snow to slide down the roof’s slope (shedding), potentially injuring people and damaging property below. Despite this, snow shedding must occur to keep the snow load from accumulating beyond the buildings structural limits. Balancing snow load and shedding is important and requires that you consider geographical and building material and roof design factors.

Ice and snow sliding down the main roof has damaged the roof panels and the valley trim on this connector roof.

Roof slopes of 45 degrees (12:12) or more, can accelerate sliding snow with sometimes immense and dangerous consequences. For example, if snow accumulates and then falls onto an exterior gas line, pipes could rupture. From there, the smallest of ignition sources could set the structure ablaze. In addition, the weight of sliding snow can propel any icicles formed on eaves can be propelled down by the force and weight of sliding snow onto people and property below.

On slopes less than 45 degrees (6:12 to 9:12), low amounts of friction (like on smooth roof surfaces) means it offers less resistance to sliding. Striations and embossing on roofing materials like metal panels add a small 3D profile and improve the resistance to sliding, especially when they run traverse to the slope.

This can get complicated, but in general, installing metal panels with snow retention devices on a steeply-sloped roof is recommended. This approach will naturally shed snow and ice, and protect your structure from excessive snow loads. If you have a low-sloped roof, be sure it’s design supports snow as shedding won’t occur naturally. Including enough snow retention devices from ridge to eave is also imperative for this design.

Use Retention Systems

A variety of retention options, such as snow fences, bars or guards, are designed to make snow and ice melt completely or fall from roofs in small amounts. This helps reduce risks associated with sudden rooftop avalanches while maintaining the clean lines of the roof. It is important that snow retention systems are carefully engineered and properly installed. Models like S-5!’s snow-retention device design resource allow you to input your roof dimensions and expected snow load to adequately engineer snow fence assemblies.

Protect Roof Attachments

This pipe penetration is protected from sliding ice and snow by a small section of S-5! ColorGuard to the panel seams immediately up-slope from the pipe.

The weight of sliding snow can be powerful enough to take off attachments like exhaust vents. To combat this, reduce the shear load by installing rigid vent pipes securely and as high up on the roof slope as possible. If this is not possible, protect the pipes with a snow retention system.

While metal roofing responds well to harsh winter weather, it is imperative to take the time to keep snow, ice and moisture from causing issues. No matter the roofing design or material used, keeping people and property safe from overhead dangers should be a priority when designing, installing and maintain your structure.

In part two of this roofing and snow series, we’ll review additional considerations. It contains tips on roof layout, color, weathertightness and maintenance, which also play important roles in winter weather protection.

For more information on roofing and snow like how metal panels fare in winter weather conditions and for advice on how to winter-proof your roof, reach out to an ABC representative today.