Parging a concrete foundation wall is an easy way to cover and strengthen an otherwise susceptible surface. This thin coating of material is particularly useful for older concrete block foundations which are held together with mortar. The process can be completed in a single day of work. Enhance the exterior of your foundation with a basic parge application and reap the benefits of a protected foundation.
Things You'll Need
- Drywall knife
- Wire brush
- Garden hose
- Portland cement
- Hydrated lime
- Washed sand
- Steel trowel
Scrape off loose bits of mortar from the foundation wall with a drywall knife.
Scrub down the wall to remove additional loose bits and debris from the foundation with a stiff bristled wire brush.
Spray a fine mist of water onto the foundation so that it is damp to the touch.
Mix together one part Portland cement, 1/2 part hydrated lime and three parts washed sand in a wheelbarrow.
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.
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.
Run a damp broom over the recently applied coating. Allow it to dry for 24 hours.
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.
- "Complete Do-It-Yourself Manual: Completely Revised and Updated"; Editors of The Family Handyman; 2005
- "Foundations and Concrete Work"; Fine Homebuilding; 2008
How to Parge a Basement
Parging is applying a thin coat of a special, sticky cement over the foundation walls of a basement. Parging a wall can...
How do I Parge Over Board Insulation?
Parging is the process of applying cement plaster to walls, such as foundation walls and rough masonry, as a waterproofing system. Parging...
How to Parge a Block Wall
Cinder or concrete block buildings and walls are fairly inexpensive; however, they can be unattractive. A parge coat on a block wall...
How to Paint Parge
Parge is a thin coat of mortar applied over the top of vertical concrete to fill surface voids, fissures and small holes....
How to Mix a Parge Coating
Masons use a parge coat to cover walls made of concrete, brick or block. A parge coat is a smooth coat of...