Parging:
Foundation Parge Coats,
Repair & Cost

Parging is a thin coat of cement-based mortar troweled onto a foundation wall, most often the exposed strip of block or poured concrete between the siding and the ground. It gives the wall a smooth, uniform face, fills the joints and voids in block, and, on masonry foundations, is part of how the building code expects the wall to be dampproofed. It is also the part of the house most people only notice when it starts cracking and falling off in sheets.

Parging vs stucco vs waterproofing

Homeowners often get three different quotes for "fixing the foundation wall" that are really three different products. Here is how they compare.

Angi's 2026 comparison puts parging at $1 to $3 per sq ft and stucco at $7 to $9, and gives parging a 30 to 50 year life against 50 to 80 for stucco when maintained. Full-service parging quotes that include removing old parge, crack repair and a finish coat come in much higher; CurrentCost's 2026 guide lists $4.50 to $12.50 per sq ft. In our experience the spread between those numbers is almost all prep.

How to parge a foundation wall

The steps below follow the Sakrete and Quikrete parging mix data sheets, with the field details our applicators add on foundation work.

1. Expose and remove loose material

   Dig the soil back a few inches below grade so the new parge runs into the ground rather than stopping at the soil line. Chip off every hollow-sounding piece of old parge back to a solid edge, and wire-brush the wall.

2. Deal with paint and coatings

   Parging does not bond to paint. Strip it mechanically, or use a mesh-reinforced system; Sakrete calls for a two-coat application over painted or unsound concrete and mentions diamond wire mesh for problem surfaces.

3. Repair cracks and holes first

   Fill open block cores, holes and active leaks before parging. Cracks in the wall itself will come straight through the parge if they are not addressed. See our foundation crack repair guide.

4. Saturate the wall

   Both data sheets call for the surface to be saturated with water but free of standing water. A dry block wall pulls water out of the mortar and the parge never gains strength or bond.

5. Apply in thin coats

   Trowel on no more than 3/8 in per coat. For two coats, scratch the first with a notched trowel or scarifier and let it harden about 24 hours (Sakrete) before the second, dampening it again first.

6. Finish and cure damp

   Float or sponge to the texture you want. Keep it damp: Quikrete says mist for 72 hours after final set; Sakrete says keep it damp or covered at least 3 days. Shade it from afternoon sun and wind.

7. Watch the temperature

   Sakrete lists 40 to 86 °F for at least 24 hours before and 48 hours after application; Quikrete says not below 41 °F or above 86 °F, and protect from freezing for 72 hours.

8. Backfill and protect

   Once cured, slope soil away from the wall and keep mulch below the top of the parge. A breathable masonry sealer or masonry paint can go on after full cure.

Why parging fails

When parging comes off in sheets and the wall behind it is clean and smooth, it never bonded. When it crumbles and is soft, it was mixed wet, dried too fast or froze. When it cracks in a pattern that follows the blocks, the wall is moving or the joints are moving water. Here is what we look for.

Where the concrete under failed parging is itself breaking up, with rusty steel or crumbling corners, treat it as concrete repair first; our spalled concrete repair guide covers the saw-cut and patch method. On flat surfaces such as steps and landings next to the wall, a bonded overlay is the equivalent of parging; see concrete resurfacing.

Where we use coatings instead

We make polyurea and polyurethane coatings, and on foundation walls they belong below grade as part of a waterproofing system, or on walls that see constant splash, not as a substitute for a decorative parge. A seamless membrane resists water that a cement parge simply absorbs. It still needs a sound, clean substrate, and parging is often what gives a rough block wall that substrate.