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FirstStep™ Sill

The FirstStep™ Sill is a high-quality composite product for the general market, delivering ideal performance for builder-grade applications and beyond. Proven with its fully customizable 5Y and 5C threshold technology, the FirstStep Sill was developed to deliver the perfect balance of quality, utility and value.

Technical data

  • Exposed screws for easy adjustment and minimized damage to door sweeps
    • No screw caps to lose
    • Quanex’s proven screw / clip technology equals reliability
  • Natural woodgrain look to the Adjustable Rail and Nosing
  • .055 Aluminum Deck available in Mill or Bronze Anodize


  • Full Sill Program with Singles, CSL, French and Patio available
  • Industry standard 5 degree dado spec with 1 3/8″ high rail
  • Will accept our full line of 5 degree extenders. (3/4″ – 4 3/8″)
  • Competitively priced product for builder-grade and retail


This page was last updated on June 27, 2024. Downloaded document versions may differ. Please check the individual documents for most current version.

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