Basic Composite Adjustable Sill

Basic 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 - Light Wood, Dark Wood

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

Finish Options - Mill, Bronze

Sill Finish Options

Sill Cap Options

Additional Product Information
Related Products
Therma-Tru Sills

Basic Composite Adjustable Sill

  • Continuous moisture- and insect-resistant all-composite substrate provides a solid stepping surface and superior rot-resistance.
  • Thick moisture- and insect-resistant composite cap and nosing resists rot and features a wood-grained texture to complement home interiors.
  • High-dam cap mates with the dual-bulb bottom sweep to help deflect moisture away from the cap.
  • Zinc dichromate screws with removable screw caps resist corrosion and adjust to help maintain a tight seal over time.
  • Thick, 15-gauge aluminum approach provides excellent durability and a solid stepping surface.
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.