Coastal Sill

Coastal 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 - Darkwood (Premium), Lightwood (Premium), Hardwood

Available Depths - 4-9/16"

Finish Options - Satin Nickel, Bronze, Mill

Sill Finish Options

Additional Product Information
Related Products
Therma-Tru Outswing Sills

Coastal Sill (Without Thermal Break – For Coastal Regions)

  • Continuous treated Pine substrate provides a solid stepping surface and resists rot.
  • All-aluminum cap and nosing resists corrosion and features an extra-high cap profile to provide improved resistance to wind-driven moisture infiltration.
  • Integrated removable weatherstrip creates a bumper effect, strengthening its seal with wind pressure.
  • Extra thick, 14-gauge aluminum approach provides excellent durability and a solid stepping surface.
Note: Helps meet code requirements in HVHZ (High Velocity Hurricane Zone) coastal regions.*

*To confirm code requirements in your jurisdiction, always check with your local building code authority. NOTE: See your Therma-Tru seller for availble 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.