
Westlake Royal Adds D5 Vinyl Siding to Royal® & Exterior Portfolio®
Westlake Royal Building Products Expands Vinyl Siding Options Westlake Royal Building Products™, a division of Westlake Corporation (NYSE: WLK), has announced the addition of new Double 5″ (D5) vinyl siding profiles across its Royal® and Exterior Portfolio® product lines. These…












