Tag Archives: Metal Roof Coatings

What Contractors Should Know When Buying Metal Roofing Coil

Contractors looking for a good deal on galvanized steel and aluminum roofing coil should always be careful—if it looks too good to be true then it probably isn’t.

There are some tools and “rules of thumb” for them to be sure they’re at least getting what they paid for.

Contractors order metal roofing coil by the square foot and most, in turn, charge their clients the same way.

So the number of square feet a coil is going to yield will dictate how much they are going to pay and how much they are going to earn.

There are a few unknowns in the process. Let’s use 24 gauge steel coil as our example. One coil of 24 gauge material can be different from another. That’s because industry standards permit “tolerances” in what constitutes a 24 gauge thickness. For example, we’ve know of one widely used “standard” that allows the thickness of 24 gauge galvanized steel to be anywhere from .0236 to .0316 inches thick. We know another one that only allows it to be from .0236 to .0296. A lot of contractors know this and realize that the yield of a coil may differ to some degree based on those tolerances. The only way to figure how many square feet the coil will accurately yield is to use a micrometer to measure the thickness of the material. And only a handful of large contractors and distributors have micrometers. Continue reading

Solar Thermal and Standing Seam Metal Roof Systems: Perfect Together

There’s been a lot of talk recently about solar photovoltaics being used with metal roofing. We’ve certainly done our share of explaining it—even have a PV system installed on our company roof.

But perhaps the most widely employed rooftop solar technology isn’t electric, it’s solar thermal for heating air and hot water. First, because it’s a lot less expensive to install and second, the payback is excellent.

Passive Solar Thermal System Under Metal RoofingSolar thermal water heating technologies rank among the simplest and oldest solar energy applications—hence they are the most cost efficient means of saving energy costs.

Four solar thermal technologies actually utilize the roof structure. Two of them –the evacuated tube technology and the flat plate collector—use the roof solely as a mounting system. But neither is reliant on the roofing surface for solar absorption. Two other systems employ under-the-roof solar thermal technology, using the standing seam metal roof as a critical component both for its solar absorption and as a means of protecting and prolonging the life of the system. Air-based solar thermal systems capture solar heated air and transfer it to the domestic water supply. Although air collectors are not quite as efficient as liquid collectors in heating water, the systems are simpler and require less maintenance than glycol water heaters. An air collector solar water heater uses the same type of differential control as a liquid system, but the differential is usually higher to account for the lower heat capacity of air. Continue reading

CHOOSING STANDING SEAM METAL ROOF COLORS TO MATCH YOUR NEW HOME’S EXTERIOR WALLS

You’re working with an architect to design your new home or renovate your current one. You’ve got the interior design worked out. And now it’s time to choose exterior wall colors and the color of your standing seam metal roof.

You want to be happy with your choice every time you pull into your driveway.  And you’re keenly aware that a well-coordinated exterior will add curb appeal and value to your home.Choose a metal roof color that compliments your siding.

Ultimately, you’ll make the choices that best suit your sense of taste and color preferences. But if you’re looking for ideas, here are some suggestions you might consider.

In a recent blog, we took a look at the standing seam roof colors 6,000 Englert customers had chosen for their new home or home renovation projects last year. And several colors clearly emerged as winners. Based on those results, we’ve researched certain color palettes and matched them with presently popular exterior wall colors and surfaces here in the United States. However, if you’re one of those adventurous homeowners who loves a brighter palette (I’m like you), then you may not find what you’re looking for here. But you’ll always be able to find bright blues, metallic coppers or even order a custom color to satisfy your tastes. Continue reading

ENGLERT Walks The Solar Walk

With A PV Rooftop System Installed on Englert’s Own Standing Seam Metal Roof

After several years of being at the forefront of integrating solar solutions with our standing seam metal roof systems Englert has become the first metal roofing manufacturer to walk the walk and install a PV system onto our own standing seam metal roof.

Rooftop Solar PV System Installed on Englert's Own Standing Seam Metal RoofThe roof-integrated photovoltaic system on our New Jersey field service center in Perth Amboy generates thousands of kilowatt hours of electricity powering the company’s rollforming and slitting operations as well as part of its corporate office complex.

The company has 611 photovoltaic panels on 16,000 square feet of Englert standing seam metal roof adjacent to our corporate office and manufacturing facility in Perth Amboy, New Jersey.  The system was installed for two reasons, first, obviously, to save on energy costs and, second,  to underscore to architects, contractors and builders Englert’s commitment to solar energy as a rooftop power source. Our rooftop system generates nearly 186,000 kilowatt hours annually that provide electricity to our manufacturing plant’s rollforming, slitting and stamping operations. Continue reading

What Are the 10 Most Popular Standing Seam Metal Roof Colors Today? See What 6,000 American Homeowners Chose for Themselves

It’s that time of year when all the big paint companies are predicting which colors will be popular for the home—inside and out.

Since our specialties are metal roofing and wall panels, we can pretty much ignore interior paint suggestions like Teacup Rose, Peachy Keen and Tangerine Tango and focus on what color metal roofing materials will go with the popular exterior wall colors forecast for this year.Showing metal roof color on a house.

The color experts seem to agree that the purpose in providing an annual color forecast is to ‘help inspire and fuel the imagination of individuals as they take on a home painting project.  Personally, I prefer the bolder color palettewhen it comes to selecting colors for a standing seam metal roof.  Hues like Pacific Blue, Terra Cotta, Burgundy and Metallic Copper always turn me on when I see them on a residential property. But the fact is, the experts tell us the colors for 2013 for home exteriors will reflect the strong influence of nature. Dark earth tones, various hues of green, blue and brown  and neutral  earth tones are predicted to lead the way again this year in exterior colors. Continue reading

Metal and Coatings Are Important: But the Paintline and the People Who Run It Will Make the Difference

Everyone always talks about the quality of their aluminum and steel in metal construction and the importance of using a high end coating.

But very rarely do you hear anyone talk about a third key element in the manufacture of a quality metal roofing or wall product—the paint line on which it is made. Virtually every aspect of a paint line plays a critical role in the final quality of the product. Following is a quick visit to a modern paint line with a look at why a state of the art manufacturing operation is critical to the production of a superior product and to the economies of cost in producing it.

Paint line systems built within the past few years are environmentally superior. They capture 100 percent of solvent fumes from painting, drying and curing operations and recover virtually all of the heat from the burning solvent for return to the process in an ultra-clean system.Metal coil paintline.

Newer paint lines have systems  that can heat their ovens and metal cleaning and pretreatment operations with no cost, saving  a substantial amount of energy which otherwise would have to be built into the cost of the product. Their environmental systems burners destroy volatile organic compounds (VOCs) and solvents in their incinerator. The heat from there is passed through for heating ovens and the boiler which creates steam heat for the cleaner and rinse tanks. Then fresh air from the coater rooms is passed through the heat exchanger and into the incinerator to be burned to complete the loop. Any excess heat is then pumped out through the stack.

Modern paint lines have an oven and incinerator with one burner along the entire line, producing the highest grade of painted metal possible. Oven heat in these modern systems is better balanced internally to give a better product with color that is uniform across the entire roll. Samples of whites produced in older, multiple-burner manufacturing systems can have a yellow cast across the width of the strip because the heat is stronger on one side of the burner than the other. The new systems set the highest standard in the industry for quality, color and consistency. Continue reading

Metal Roofing Contractors Can Avoid Cinching AKA Friction Scratches With These Simple Rollforming Tips

Cinching, sometimes also referred to as “friction scratches” or “pickoff,” is the result of the movement or slipping of painted coil laps against each other on a rollforming machine.

This phenomenon can be frustrating to metal roofing contractors because it causes the removal of paint in the shape of small or medium sized scratches on metal roofing coil formed in the same direction of the slipping or movement of the coil laps.

Some clear signs that cinching is the cause of these short longitudinal scratches are:
•    Worn or broken pieces on the spools, idler rolls and guides,
•    Gaps or air spaces between sections of the laps of the coil
•    The ability to move the laps of coil with hand pressure, a sure sign that coil has unraveled.

Cinched metal roofing panel.The vast majority of cinching incidents are caused by improper brake pressure on the un-coiler spool or the expandable arbor brake on the rollforming machine.  For portable roll formers, the improper brake pressure on the un-coiler spool is by far the source of most cinching. And new machine operators not familiar with the use of the brake or trained incorrectly are responsible for most of the problems.

To avoid cinching, the rollforming machine operator must make sure there is proper tension to allow the coil to uncoil without tightening the laps or without loosening the coil so it does not unravel. If either of these actions occurs, the laps will rub against each other and cause cinching. Continue reading

Standing Seam Metal Roofs: Always Look On The Bright Side of Life

Quick! What color is the standing seam metal roof on a Home Depot? Barnes & Noble? How about a Lowes Home Improvement store?

We’ll bet you knew all three of them-orange, green and blue. And not any orange, green and blue because each of those retail giants has a custom name for its colors. They know their colors play a key role along with signage to brand their companies and ultimately help customers identify and remember their stores in the great clutter of America’s malls and roadside retailers.Metal roof on IHOP restaurant.

They are not alone. Scores of fast food chains, national and regional gas stations, hotel chains and the like have signature color standing seam metal roofs that serve as beacons to customers. The color in essence becomes part of their brand.

Why? Because color possesses an inherent ability to stimulate an aesthetic consciousness simply by the visual satisfaction that it creates. Used intelligently, color and colored light can add distinctiveness and appeal to any project. Continue reading

Sorting out the Necessary Test Requirements for Metal Roofing Projects

We know that the metal roofing tests and standards an architect must include in a project specification can sometimes be confusing.

For example, we see  some architects—and particularly designers new to the profession — specifying  ASTM E 1592  for a plywood or B-Deck and B-Deck with ISO when, in fact, 1592 is the test method for structural performance of a metal roof for open framing such as a purlin application.
Image showing fire testing of a metal roofing surface.
Often, we’ll see architects using a Factory Mutual test specification for fire resistance when first, an FM designation is really only for projects to be underwritten by Factory Mutual (FM) Insurance and second, the FM specification is far more stringent than the project requires and consequently will be a lot more expensive for the builder to meet.  Besides, Factory Mutual offers RoofNav, a simplified and very specific means of determining a roofing product’s and roof system’s compliance with FM Approvals’ guidelines and standards.

Some architects even submit metal roof specifications with information drawn word-for-word from the specs of an earlier metal roofing project that had similar requirements—but was not exactly the same.  This is a bad idea because the specification information often differs dramatically even though the projects seem similar.

How can architects and builders avoid these problems? Two ways…. Continue reading

Metal Roof Coatings: What to Look for When Choosing a Durable Topcoat

When architects and building owners are looking for specific performance characteristics in choosing a metal roof, they are inevitably looking for its coating to act as a continuous barrier, adhere tightly to the substrate, and not fade, peel or chip over its life. They expect it to be hard enough to resist incidental scratches from transportation, installation, and roof traffic and impact. They do not expect it to be so brittle as to crack during metal forming. They want it to resist damage from atmospheric chemicals and salt and not chalk, fade, lose gloss, or stain. In other words, they want the coating system to be durable, enhancing the life of the metal roof underneath and extending the guarantee that the product will perform effectively for many years.

There are dozens of tests that paints can undergo to determine their performance characteristics for durability (See National Coil Coating Association Tool Kit #8). There are falling sand erosion tests, acid tests, adhesion after impact and bending tests and acid rain and salt spray simulations.  Fade, chalk and gloss are the most important characteristics measured in weathering tests.

Paints are usually identified by a resin type such as polyester, urethane, latex, etc. Tradeoffs in creating these systems are made to meet different price points for different needs. But, paints should also be considered as complete systems, rather than as a simple addition of a better or cheaper part of the product.Metal roof coating colors

Let’s dig a little bit more deeply to see what makes the difference in a superior metal roof coating. There are several coil coating topcoats available but only three are used primarily for coil coating exterior metal like that which is found on a standing seam metal roof system. Polyesters have traditionally occupied the low end of the market. They offer a hard, scratch-resistant finish and a wide range of gloss. But polyesters are prone to chalking when exposed to UV or sunlight. Since their introduction in the 1960’s, polyesters have been greatly improved with higher molecular weights and longer polymeric chains that create stronger, more UV-resistant bonds.

Silicone-modified polyesters (SMP), also known as silicone-protected and siliconized polyesters, use polymerized silicone to improve polyester chalk performance and gloss retention. But one disadvantage of silicone polyesters is lower flexibility due to the highly crosslinked and branched structure of these polymers. Continue reading

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