Holcim: World's largest concrete company buys Saginaw roofing maker for $1.3 billion

The world's biggest cement maker, Switzerland's Holcim Ltd., will acquire Saginaw-based Duro-Last Inc., a producer of single-ply roofing systems that has seen double-digit growth, for $1.29 billion to strengthen its building product offering. Founded in 1976 as Tri-City Vinyl, the acquired...