Category Archives: Sustainability

Metal: Keeping the Planet Green

Did you know about 40,000,000 tons of wood are sent to landfills every year? In contrast, as much as 80,000,000 tons of steel are recycled every year. That’s sustainability!

Learn more about how metal helps keep the planet green >

Source: AISI Annual Statistic Report 2019 and analysis by Mark Thimons, AISI Vice President of Sustainability

Metals Got More

Think wood’s got the advantage for environmental benefits? Think again. Metal has significantly longer life, better insulation and can be recycled. Meanwhile, wood has significant waste. Looking at the big picture, metal is the better environmental choice.

Construct the Future with Metal >

#GreenBuild #metalconstruction

In a Green World, Distinguishing New Metal Roofs from Old is Hard

St. Catherine’s Church, in Reutlingen, Germany

By: Jane Martinsons, Metal Construction Association

We may know the start of 2014 down to the exact second, but the lines between old and new metal design and building materials will continue to blur well into the New Year and beyond. Here are two examples of how metal manufacturers are helping to redefine the true age of metal roofs in a green world.

First, let’s look to Europe where 100-year-old zinc roofs are commonplace, and in particular, at the recently renovated 120-year-old zinc roof on St. Catherine’s Church in Reutlingen, Germany. This roof restoration called for dismantling and removing all the zinc tiles from the roof in order to inspect, clean, and salvage as many as possible. Tiles that were too damaged for reuse were recycled, but inspectors found  the tiles that were not exposed to the main west-facing wind and weather were nearly all reusable. The remaining roof was re-clad with RHEINZINK  0.7mm square tiles, using 1,500 PrePATINA blue-grey 330mm x 330mm tiles.

Located at the old cemetery, the Gothic Revival-style church is now preserved to its original state, circa 1890. RHEINZINK says that with the service life of zinc products expected to last 80–100 years for roofs and 200–300 years for walls, the roof tiles will be around for New Year celebrations for generations.

“When our client said ‘give me a roof that I will never have to replace,’ we thought metal immediately,” said Nathan Kipnis, AIA.

Stateside, a new LEED Platinum home in Glencoe, IL, features an unusual look for a LEED home—traditional rather than modernist design, allowing the home to complement its neighborhood. The standing seam metal roof was a key element of the sustainable design. About 600 sq ft of 24-gauge PAC-CLAD  material from Petersen Aluminum, Elk Grove Village, IL was used. The Silver Metallic Kynar 500 coating offers high reflectivity and SRI (solar reflectance index) ratings and is Energy Star approved.

Private Residence, Glencoe, IL

The roof provides many green features. Its shape is asymmetrically arranged to collect as much storm water as possible. It is also sloped at two different angles—a summer and a winter angle. The steeper, south facing roof supports solar thermal panels, which are optimal for the low winter sun. The shallower south facing section of the roof includes solar PV panels, which maximize electrical production during hot summer days.

“When our client said ‘give me a roof that I will never have to replace,’ we thought metal immediately,” said Nathan Kipnis, AIA, principal of Kipnis Architecture and Planning, Evanston, IL. Meanwhile, general contractor, Scott Simpson, president of Scott Simpson Builders in Northbrook, IL, says that, beyond this project, he recently used an old metal barn roof on the interior walls of a renovated—and much beloved—bakery in Evanston.

New Environmental Product Declaration for IMPs

By: Jane Martinsons, Metal Construction Association

An Environmental Product Declaration (EPD) for insulated metal panels (IMPs) is now available from MCA.

EPDs provide life-cycle assessment information and details about the product’s environmental impact (i.e., raw-material extraction, transportation, packaging, and disposal).  As such, EPDs assist purchasers and users in making informed comparisons among products.

“With the recent approval of LEED v4 rating system, we expect to see more members of the design community looking for EPDs as part of an overall emphasis on transparency,” notes MCA Technical Director Scott Kriner.  “The EPD for IMPs is based on the life-cycle assessment of this product category. It is a major step forward for the metal construction industry in reporting the environmental impact of IMPs.”

IMPs are composed  of rigid foam that is sandwiched between two sheets of coated metal. Their steel or aluminum panel facings create a vapor, air, and moisture barrier that provide long-term thermal stability. According to MCA-member manufacturers, IMPs

  • offer long-term durability
  • come in a multitude of colors and finishes
  • offer cost-competitive construction advantages and long-term high performance to help lower operating costs for building owners in any construction market.

Download the full EPD report, or review the executive summary, to learn more about the environmental aspects of IMPs.

“Cool” Roof Retrofit Earns Praise for Energy Efficiency

By: John Ryan, Metal Construction Association

Sometimes the word “cool” can be a bit overused–but not in the case of this recent metal roof retrofit project with the U.S. Air Force’s Goodfellow Air Force Base in Texas. This roof is cool–both literally and figuratively.

In 2010, a team of leading metal construction companies and the Metal Construction Association (MCA) were awarded a $1 million Environmental Security Technologies Certification Program (ESTCP) grant to develop a retrofit metal roof system with integrated renewable energy technologies, including an integrated assembly of six different roofing system components.

View the video above or read MCA’s case study to learn more about the project’s energy-efficient technologies, which include photovoltaics to generate electricity, solar-thermal technologies for domestic hot water and space heating, and rainwater capture for irrigation.after photo WEB

The Department of Energy’s Oakridge National Laboratory will soon be analyzing a full year’s worth of data on heat transfer, energy output from the photovoltaic panels and water usage from the building. MCA expects that the results will be positive, and the Air Force reports that preliminary numbers how a 44-percent reduction in energy consumption.

Stay tuned for the full report and results in the coming months from this “cool” project.