HOUSTON--(BUSINESS WIRE)--Westlake Royal Building Productsâ"¢ ("Westlake Royal†), a Westlake company (NYSE:WLK), has announced the expansion of its Grove Collectionâ"¢, a line of architectural PVC trim and mouldings, to include column wraps and new color, Rich Cedar. Available in 6†x6†and 8†x8†sizes in 10' lengths, Grove Collection's new column wraps are designed to slip easily over existing columns, providing an instant, premium upgrade to porches and exteriors. Its ease of installation saves ti. ...