Kerf-Applied Dual-Bulb / Dual-Fin Bottom Sweep

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.


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

Additional Product Information
Related Products
Therma-Tru Inswing Bottom Sweeps

Kerf-Applied Dual-Bulb / Dual-Fin Bottom Sweep 

  • Dual bulbs help maintain full contact with narrow sill caps.
  • Dual fins create added barriers against moisture infiltration.
  • Integrated rain deflector helps push moisture away from the cap.

Sills:  Composite Adjustable | Hardwood Adjustable | Basic Composite Adjustable 

Note: Non-kerf-applied option available for replacement applications.

  • Kerf-Applied Single-Bulb Bottom Sweep
  • Designed to mate with our inswing sill caps to help seal the margin between the door and sill.

  • Kerf-applied to fit securely into the bottom of the door to help protect against moisture penetration.

  • Heavy-duty material resists deterioration, holding its shape to help maintain contact over time.