US LBM added another ProSales 100 company to its portfolio today when it announced its acquisition of Rosen Materials, a Sunrise, Fla.-based specialty dealer with 19 facilities in Florida, Georgia, Illinois, Nevada, and New Jersey.

Rosen ranked 42nd on last year's ProSales 100, with sales in 2013 totaling $110 million. Rosen Materials president Drew Rosen and his staff will continue to run the company.

In addition to Rosen Materials, the company also acquired Direct Cabinet Sales, a N.J.-based installer and distributor of kitchen cabinetry. Direct Cabinet Sales operates five showrooms and a distribution center in New Jersey and a showroom in Boca Raton, Fla.

Rosen is one of South Florida's largest gypsum distributors, US LBM said, and its acquisition marks the fifth time US LBM has sought to add a gypsum specialist to its portfolio. Wallboard sales across US LBM now total $280 million a year, the company said.

In an unsual addition to its typical press release, US LBM also said it "is actively seeking additional ways to partner with other Southern-based distributors, as well as gypsum product distributors, to expand its geographic footprint throughout the United States."

US LBM is ProSales' 2015 Dealer of the Year. Founded in 2009, it has grown spectacularly over the years and likely will crack the Top 10 in this year's ProSales 100. Its current annual sales total about $1.8 billion.

The company's principal owner--the private equity firm Blackeagle Partners, also has put the company up for an auction sale.