How to Parge a Foundation Wall

Written By
PR
Paul Ramone
Published: Apr 30, 2011
Updated: Nov 20, 2021
2 minute read

Enhance the exterior of your foundation with a basic parge application and reap the benefits of a protected foundation.

Things You Will Need

  • Drywall knife
  • Wire brush
  • Garden hose
  • Wheelbarrow
  • Portland cement
  • Hydrated lime
  • Washed sand
  • Shovel
  • Steel trowel
  • Broom
  1. Scrape off loose bits of mortar from the foundation wall with a drywall knife.

  2. Scrub down the wall to remove additional loose bits and debris from the foundation with a stiff bristled wire brush.

  3. Spray a fine mist of water onto the foundation so that it is damp to the touch.

  4. Mix together one part Portland cement, 1/2 part hydrated lime and three parts washed sand in a wheelbarrow.

  5. Slowly add water to the dry materials in the wheelbarrow and stir together with a shovel. Stop once the material has the consistency of peanut butter.

  6. Scoop the mixture onto a flat trowel and spread it onto the base of the wall with upward strokes. Continue parging the foundation until it is covered with an even coat. Aim for a thickness of 1/4 inch.

  7. Run a damp broom over the recently applied coating. Allow it to dry for 24 hours.

  8. Dampen the foundation with a mist of water, then apply a second coating using the same process as the previous day. The second coating will dry in 24 hours.

The Drip Cap

  • Parging a concrete foundation wall is an easy way to cover and strengthen an otherwise susceptible surface.
  • Scrub down the wall to remove additional loose bits and debris from the foundation with a stiff bristled wire brush.
  • Aim for a thickness of 1/4 inch.
  • Allow it to dry for 24 hours.
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