Overview
Duro-Last
Duro-Last is a manufacturer of custom-fabricated single-ply roofing systems, with headquarters at 525 Morley Drive in Saginaw, Michigan. The company began as John R Burt Enterprises. Holcim Building Envelope completed its acquisition of Duro-Last in 2023. In 2025 Amrize became an independent, NYSE-listed company, and Duro-Last is a core brand in its Building Envelope division.
The company operates facilities in Saginaw, Michigan; Grants Pass, Oregon; Oscoda, Michigan; Jackson, Mississippi; Sigourney, Iowa; Carrollton, Texas; Ludlow, Massachusetts; Largo, Florida; and Kernersville, North Carolina. Texas operations moved to a 130,000 square foot facility in Dallas in 2025, which expanded capacity by more than 40 percent.
The Technical Library holds seven Duro-Last PVC membrane records. Duro-Last PVC Membrane is the original custom-fabricated membrane. Duro-Last EV PVC Membrane and Duro-Last EV Fleece PVC Membrane are the EV versions, the second with a fleece backing. Duro-Last X PVC Membrane is the X product, introduced in 2021 as a 10-foot-wide roll good offering custom-cut lengths. Duro-Tuff PVC Membrane is sold as roll goods and was introduced in 2012. Duro-Fleece PVC Membrane and Duro-Fleece Plus PVC Membrane are the fleece-backed membranes in the Duro-Fleece line.
The company’s other products include Duro-Guard insulation, introduced in 2012, and Duro-Life 600, developed in partnership with DuPont and introduced in 2022. Duro-TECH TPO was introduced in 2025. Related businesses include Oscoda Plastics, which makes roofing accessories and moved to Oscoda in 1993, Plastatech, which has a plant in Saginaw, TIP-TOP Screw Manufacturing, and ANViL Paints and Coatings.
The company recycles its manufacturing scrap. The ROOF-TRAK walkpad, introduced in 1989, began its recycling operations. NSF/ANSI 347 gold status was earned in 2016 by the Duro-Tuff, Duro-Fleece and EV membranes, and the flagship membrane reached platinum status in 2017. The company published its first product-specific Environmental Product Declaration for single-ply PVC membranes in 2015.
The market served is commercial roofing, in new construction and re-roofing.
Relevant manufacturer history
John R. Burt formed Bridgeport Pools with friends in 1963 and became its sole owner in 1969. Tri-City Vinyl began making its own pool liners in 1975 and was incorporated in 1977. The first Duro-Last roof was installed in 1978, and Duro-Last was incorporated in 1981 with seven employees and $200,000 in sales.
In 1982 Burt bought a 75,000 square foot facility at 525 Morley Drive in Saginaw, which remains the headquarters. Duro-Last became a registered U.S. trademark in 1984. Headcount reached 175 and sales reached $25 million in 1988. Burt died in 2003, and the company marked 25 years of manufacturing the roofing system that year. In 2004 it reached 1 billion square feet of manufactured membrane, and it reached 2 billion in 2013.
Tom Saeli became the first non-family CEO in 2011. Duro-Tuff roll goods were introduced in 2012. A Carrollton, Texas, facility opened in 2013. Duro-Last acquired ANViL Paints and Coatings in 2016. Holcim Building Envelope completed the acquisition of Duro-Last in 2023.
