How to Finish a Basement Wall

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  • Air compressor
  • Air hose
  • Caulk gun
  • Chalk line
  • Circular saw
  • Corded drill
  • Extension cord
  • Framing square
  • Hammer
  • Hearing protection
  • Knee pads
  • Level
  • Safety glasses
  • Tape measure
  • Utility knife

Materials Required

  • 2×4 green treated lumber
  • 2×4 lumber
  • Rigid insulation

Project step-by-step (13)

Step 1

Seal the Wall

  • Use a paint roller to apply the masonry waterproofing product you choose.
    • Note: This step is only to help prevent water that naturally migrates through concrete through a capillary effect.
A man uses a paint roller on a white wall in a basement, applying paint to an unfinished surface with cinder blocks and exposed beams above.
FAMILY HANDYMAN
Step 2

Install Blocking Between Joists

  • Screw or nail one side of the block through the joist, and secure the other side to the sill plate.
    • Pro tip: Use treated lumber if the brace will come in direct contact with bare concrete.
A man uses a nail gun to fasten a wooden beam in a basement, surrounded by concrete walls and wooden beams above.
FAMILY HANDYMAN
Step 3

Install Foam Board Sheets

  • Apply the adhesive vertically to keep water from pooling behind the foam insulation.
    • Pro tip: Be sure you use XPS foam insulation—other types are not as moisture resistant. 
A man positions pink insulation board against a concrete wall in a dimly lit basement, preparing to secure it in place.
FAMILY HANDYMAN
Step 4

Snap Lines on the Floor

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