Myths About Metal Roofing: Heat, Wind and Lightning

Posted on February 3, 2016 by Amy Crenan

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. I call these “mythbuster […]

Wind Designs for Metal Roofs

Posted on January 19, 2016 by Jason Allen

One of the most important requirements for roof installation is ensuring that a roof stays in place when the wind blows.  The core concept is that the roof’s wind resistance needs to be greater than the wind loads acting on a building’s roof.  Wind resistance is most commonly determined by a physical test; wind loads […]

Roofing Underlayment and its Attachment Requirements

Posted on January 7, 2016 by kbuchinger

The International Residential Code (IRC) is commonly considered to be a prescriptive code, which means there are many requirements included that provide specific directions. Prescriptive-based code language provides a simpler method of enforcement for inspectors. And shouldn’t that be the case for one- and two-family dwellings, where well built and affordable is the goal? In […]

3 Energy-Saving Technologies to Consider with Metal Roofs

Posted on December 16, 2015 by Amy Crenan

A roof’s primary function is to keep a building weatherproof. A roof’s secondary function—and approaching nearly equal importance—is to be an energy-efficient element of the building envelope. From an energy efficiency standpoint, we’re accustomed to the inclusion of insulation. Are we as accustomed to the ideas that roof color and air leakage matter for energy […]

Better Barriers: Meeting Thermal Performance, and Controlling Air and Moisture

Posted on December 10, 2015 by Robert Baker

Panelized metal exteriors have joints. It’s just a rule of best-practice design. Yet these joints are seen by some as interruptions in the façade or roof, when in fact they are connections — the opposite, one can argue, of the word “interruption” that suggests a discontinuity. In fact, engineered metal panel systems offer arguably the […]

Reroofing with Steep-slope Metal Panel Roof System Over an Existing Low-slope Roof: Part 2

Posted on November 30, 2015 by Jason Allen

Let’s continue the discussion about converting low-slope roofs to steep-slope metal roofs. Part 1 discussed attachment of framing, the new attic space, ventilation and condensation issues, and drainage. Reroofing Code Requirements  Converting a rooftop is a specialized type of reroofing.  The codes specifically allow this via an exception that says “complete and separate roof systems, […]

A Common Misconception About Determining Thermal Resistance

Posted on November 24, 2015 by Brad Johnson

As an architect, you’re required to design a building’s wall to meet the code-required R-value (or U-factor) in the International Energy Conservation Code. So you design the wall and add up the manufacturer-stated R-values of the components.  Done, right? That method only makes sense if walls have no joints, seams, windows, or doors! Let’s think […]

Fire resistance of metal panel roof systems

Posted on November 3, 2015 by Randy Wilken

Metal is inherently fire resistant.  The codes acknowledge that; however, certain limits are placed on metal’s fire resistance when used as part of a metal roof system. Metal panels transfer heat very well—they get hot quickly and give up heat quickly.  And, in many cases, there is a building component (roof deck, framing) directly under […]

Reroofing with steep-slope metal panel roof system over an existing low-slope roof: Part 1

Posted on October 28, 2015 by Jason Allen

You’ve probably seen many articles and photos of buildings with low-slope roofs converted to steep-slope metal panel roofs.  Aesthetics and leakage are driving these conversions, but mostly leakage of the low-slope roof.  Owners are frustrated with leaks and believe a steep-slope metal roof is their answer, and it certainly can be!  There are a number […]

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