Composite Adjustable Sill

Tru-Defense Eligible

Composite Adjustable Sill

Genuine Therma-Tru® sills and bottomsweeps help form a tight seal against wind-driven moisture infiltration at the bottom of the door system and help channel moisture away from the home. The sill pan (recommended) adds an extra layer of protection to help keep moisture away from the subfloor.


Product Options

Cap Finish - Lightwood (Premium), Darkwood (Premium)

Available Depths - 5-3/4, 7-3/4, 4-9/16

Finish Options - Satin Nickel, Bronze, Mill

Sill Finish Options

Sill Cap Options

Additional Product Information
Related Products
Therma-Tru Sills

Composite Adjustable Sill

  • Extra thick, continuous moisture- and insect-resistant all-composite substrate provides a solid stepping surface and superior rot resistance.
  • Thick, through-colored moisture- and insect-resistant composite cap and nosing resists wear and rot, and features a wood-grained appearance.
  • High-dam, narrow cap mates with the dual-bulb bottom sweep to help deflect moisture away from the cap; engineered U-shaped weather seal creates an added barrier against wind-driven moisture infiltration.
  • Flush-fitting, premium stainless steel screws form an uninterrupted sealing surface, resist corrosion, and adjust the cap vertically to help maintain a tight seal over time.
  • Thick, 15-gauge aluminum approach provides excellent durability and a solid stepping surface.

Note: Continuous length available with spread mullion capability to fill 49"-75" rough openings.*

* See the Therma-Tru 2018 Architectural Details & Components maunal for actual unit size specifications. NOTE: See your Therma-Tru seller for available component options.

Adjustable for long-lasting performance.
Genuine Therma-Tru sills are engineered with features to help minimize the potential for leaks and drafts. Our adjustable sills allow flexibility to adjust the sill cap vertically to close gaps over time, helping to maintain a tight seal between the sill and bottom of the door.