Who Owns Cultured Stone?

Brothers Garrett and Floyd Brown founded Cultured Stone in 1962 in Vallejo, California. Their idea was straightforward: cast lightweight concrete veneer that looked like natural stone but could be adhered to walls without the structural support real stone required. The product created an entirely new building category, manufactured stone veneer.

Owens Corning acquired the company and ran it for decades, scaling national distribution. Boral Limited purchased the business from Owens Corning in a multi-year transaction completed in 2014 for a minimum of $90 million. Boral folded Cultured Stone into its North American building products portfolio, where it became the flagship manufactured stone brand.

When Westlake bought Boral's North American building products businesses in October 2021, Cultured Stone came with Eldorado Stone, Versetta Stone, TruExterior, and Boral's roofing and window lines. The combined business was rebranded Westlake Royal Building Products.