newsfilter
← Latest News
Business Wire·

Westlake Royal Building Products™ Introduces 5/8" Lap Siding Profile for TruExterior® Siding & Trim

  • Westlake Royal Building Products added a 5/8" Lap Siding profile to its TruExterior line, combining traditional cedar aesthetics with poly-ash material performance.
  • The new product features a true 5/8" butt, mimics real cedar shadow lines, & requires no sealing of ends or cuts.
  • TruExterior 5/8" Lap Siding is made of poly-ash, a blend of polymers & fly ash that ensures dimensional stability & resistance to warping, cracking, & splitting.
  • The siding supports ground-contact applications, accepts any paint color including dark hues, & offers workability similar to wood without special tools.
  • Installers can fasten the material close to the edge without mushrooming or pre-drilling.
  • The product was named a finalist in two categories for the 2026 Best of IBS™ Awards: "Best Outdoor Product" & "Most Innovative Building Material Product."
  • The awards are hosted annually by the NAHB International Builders' Show to recognize outstanding residential construction industry products.