Westlake Royal Building Products

Exterior design doesn’t happen by itself. That’s why Westlake Royal Building Products has high-profile, low-maintenance siding, trim and decking for every kind of home—and the tools and tips you need to make sense of it all.

*Product mix varies by location, please check with your local branch for product availability.

TruExterior Siding & Trim

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TruExterior Siding & Trim

TruExterior poly-ash siding is unlike any other exterior siding. It has the versatility and toughness to stand up to extreme weather, ground contact and damage from bugs.

TruExterior gives pros total freedom to create custom looks with authentic siding and trim profiles that can be cut, milled, glued, stained and painted to achieve outstanding curb appeal that homeowners can’t resist. It’s the siding package of choice when you want it done the right way – your way.

Product Details

Features & Benefits

  • Designed for use in non-structural applications
  • Suitable for ground and masonry contact and can also be used in moisture-prone areas
  • Installation is the same regardless of the season
  • Accepts common high-quality, exterior-grade fasteners that are suitable for the local environment.
  • Can be fastened close to the edge and no need for pre-drilling
  • Resists rot and termite attacks and no excessive swelling
  • Dimensionally stable, promoting long-lasting paint adhesions, even with dark colors*
  • Virtually no moisture cycling, paint last longer than on wood*
  • Traditional exterior-grade caulks and exterior-grade wood fillers are acceptable for filling nail holes
  • Tighter gaps, minimal movement—it will move less than PVC and vinyl
  • 20 year limited warranty


TruExterior Siding Trim Brochure

TruExterior Trim Brochure

TruExterior Installation Guide

TruExterior Safety Data Sheet

TruExterior Siding Warranty

TruExterior Trim 3 Part Specification

TruExterior Trim Warranty