Step 8: Back-caulk the joints

man caulking house exterior for replacement clapboard
Photo: Webb Chappell
«»
Lay a thick bead of caulk on both ends of the space where the new board will go. The bead should cover the end grain of the neighboring clapboard and the gap between its back side and the sheathing. In this application, Tom favors a paintable acrylic latex caulk.
Ask TOH users about Siding

Contribute to This Story Below

    Tools List

    • utility knife
      Utility knife
    • flat prybar
      Pry bar
    • hammer
      Hammer
    • hacksaw blade
      Hacksaw blade
    • hand saw
      Handsaw
    • caulk gun
      Caulk gun

    Shopping List

    1. Replacement Clapboard (see Overview)

    2. Acrylic Latex Caulk

    3. 7d Stainless Steel Ring-Shank Siding Nails