Duro-Last Owners Said to Weigh $1.1 Billion Sale of Roofing Firm

Duro-Last Inc.’s owners are considering a sale that could value the US roofing group at as much as $1.1 billion, according to people familiar with the matter.

Shareholders including the family of founder John R. Burt are working with an adviser to explore strategic options for the Saginaw, Michigan-based company, said the people, who asked to not be identified because the matter isn’t public.

Duro-Last may attract interest from companies including Swiss building materials firm Holcim Ltd., which has been expanding in roofing through acquisitions, the people said. US competitor Carlisle Cos. and France’s Cie. de Saint-Gobain are ...