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Royal S4S Trimboard is available in three standard thicknesses and an industry-leading eight standard widths. With more available widths, the need for ripping boards is decreased, saving you time.

  • Lifetime never rot warranty
  • Ready to install
  • No further painting required
  • Repaintable with oil or latex
  • Low maintenance
  • Moisture and termite proof material
  • Install below grade or direct to masonry
  • Does not promote mold or mildew
  • Saves time and labor
  • Prefinished
  • Uses standard woodworking equipment
  • Long lengths—perfect tip-to-tip
  • Superior nailing and gluing
  • No grain raise, pitch bleed or knots
  • No splitting or cracking
  • High energy efficiency
  • 70% better insulation than wood
  • 1,600% better than aluminum