Westlake Royal Building Products™ Adds New D5 Vinyl Siding Options Across Royal® and Exterior Portfolio® Lines

2026-02-19 - 14:13

HOUSTON -- Westlake Royal Building Products TM (“Westlake Royal”), a Westlake company (NYSE: WLK), has added new Double 5" (D5) vinyl siding options across its Royal® and Exterior Portfolio® brands, introducing the D5 profile within the Royal EstateTM line and the Exterior Portfolio Market Square® line in all colors. Read More