Royal Building Products’ door and window profiles business is being sold by parent company Axiall Corporation to OpenGate Capital, a private-equity firm based in Los Angeles. The transaction is subject to regulatory approval and is expected to close by the end of the month.

Terms of the deal were not disclosed.

“As we refine our portfolio, we are pleased to have reached an agreement to sell our window and door profiles business to OpenGate Capital,” said Axiall president and CEO Tim Mann. “This is our fourth divestiture of non-core assets since April 2015, which allows us to better focus on our core chlorovinyls and derivatives. In particular, selling this business leaves Royal Building Products with the solid core product lines that generate better EBITDA margins, namely our siding, trim, moulding, fittings and pipe businesses.”

The Axiall compounding facility located in Concord, Ontario, is included in the transaction.

Royal is a leading manufacturer of rigid and cellular vinyl window and patio door profiles, as well as interior vinyl shutters and other extruded vinyl products. Its door and window branch is headquartered in Ontario, Canada, and it has seven manufacturing facilities in North America.