John Altmeyer Named Executive Chairman, GAF Commercial Roofing

January 26, 2021
PARSIPPANY, NJ (January 26, 2021) - GAF, a Standard Industries company and North America’s largest roofing manufacturer, today announced the appointment of John Altmeyer as Executive Chairman, GAF Commercial Roofing, effective February 1. Altmeyer previously served for 21 years as President of Carlisle Construction Materials, which he grew to be the largest and most profitable of Carlisle’s operating units.

In this new role, Altmeyer will develop and lead a multi-year strategy focused on making GAF number one in the commercial roofing market. Altmeyer will report directly to David Winter and David Millstone, Co-CEOs of Standard Industries.

“We have great ambitions for GAF’s commercial business, which we’ve long believed has what it takes to be the market leader,” said David Millstone, Co-CEO of Standard Industries. “In John, we have found someone who not only shares these ambitions, but is also uniquely equipped to realize them as we accelerate our investment across every category of commercial.”

“With his deep industry experience, along with a proven track record of driving results and transforming businesses, John is singularly positioned to dramatically expand our commercial roofing business,"" said David Winter, Co-CEO of Standard Industries. ""Under his leadership, we look forward to becoming the preeminent player in commercial roofing.""

“I am tremendously excited about the opportunity to join the GAF team,” said Altmeyer. “My mandate is to drive GAF to a leadership position in the commercial market. The building blocks for success are here—a strong team, excellent technologies and capabilities, and a commitment to win. I look forward to working with Jim Schnepper and the GAF team to help realize its full potential in the commercial roofing market.”

“I have long admired John and am happy to have the opportunity to work with him,” said Jim Schnepper, President of GAF. “His experience and leadership, coupled with the extraordinary talent at GAF, will set us up for tremendous success as we look to grow in this market.”



About GAF
GAF, a Standard Industries company, is the leading roofing and waterproofing manufacturer in North America. For more than 135 years, GAF has been trusted to protect what matters most for families, communities and business owners with its innovative solutions and focus on customer service. GAF's leadership extends to its commitment to making a positive impact on its communities, industry, and planet. Learn more at

About Standard Industries
Standard Industries is a privately-held global industrial company operating in over 80 countries. The Standard ecosystem spans a broad array of holdings, technologies and investments—including both public and private companies from early to late-stage—as well as world-class building materials assets and next-generation solar solutions. Throughout its 140-year history, Standard has leveraged its deep industry expertise and vision to create outsize value across its businesses, which today include operating companies GAF, BMI, Siplast, GAF Energy, Schiedel, and SGI, as well as related businesses 40 North, a multi-billion-dollar investment platform, 40 North Ventures, and Winter Properties.

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