CLEVELAND, Ohio, October 16, 2018-- The Riverside Company, a global private equity firm, has invested in Woon-Tech, a Boston, Massachusetts, manufacturer of specialty glass for shower enclosures and other residential and commercial applications. Woon-Tech is an add-on to Riverside’s Cardinal platform. Riverside invested in Louisville, Kentucky-based Cardinal in early 2018. The company manufactures and provides glass products for residential, hospitality and light commercial use. The addition of Woon-Tech complements Cardinal’s product portfolio and will expand its geographic footprint.