How much does it cost to refinish cracked and peeling parging in Ottawa?

Cracked and peeling parging is one of the most common foundation issues in Ottawa — our brutal freeze-thaw cycles (we typically get 50+ cycles per winter) are absolutely punishing on parging that's past its prime. Refinishing costs depend on how much of the old parging needs to come off and how extensive the underlying damage is. For a typical Ottawa home, expect to pay between $1,200 and $4,500 for a complete parging refinish.

Cost breakdown by scope

Spot repairs on isolated cracks and peeling (under 25% of surface): $400–$1,200

If most of your parging is still solid and you just have a few problem areas — typically around window wells, hose bib locations, or where grade meets foundation — targeted repairs are the cost-effective approach. The contractor chips out the loose material, cleans the substrate, applies a bonding agent, and patches with fresh parging mix.

Full strip and re-parge (entire foundation perimeter): $1,500–$4,500

When more than 40–50% of the parging is cracked, hollow-sounding, or peeling, it's more economical to strip everything and start fresh. This is the most common scenario for Ottawa homes where the parging is 15–25+ years old. The process involves:

• Removing all old parging: $3–$5/linear foot- Surface prep and bonding agent: $2–$3/linear foot- Two-coat parging application: $8–$14/linear foot- Total: $13–$22/linear foot (strip and refinish)

For a typical Ottawa home with 120–160 linear feet of exposed foundation, that works out to $1,560–$3,520 on the conservative end.

Important: check what's underneath. Cracked parging sometimes reveals deeper problems. If the concrete block or poured foundation underneath is deteriorating, spalling, or showing efflorescence (white salt deposits), that signals moisture issues that need addressing before new parging goes on. Foundation waterproofing or drainage corrections are separate costs but critical to address — otherwise your new parging will fail prematurely too.

Material choices for Ottawa durability:

Insist on a polymer-modified parging mix with acrylic admixture — not plain Portland cement and sand. The acrylic additive costs about $1–$2 more per linear foot but dramatically improves freeze-thaw resistance and flexibility. Products like Quikrete Commercial Grade Parging Mix or Sika ProSelect are readily available in Ottawa and formulated for our climate.

The finish coat should be applied at a minimum 3/8 inch thickness in two passes. Single-coat applications are a common shortcut that leads to cracking within 3–5 years. Two coats, properly cured with 48 hours between them, should give you 15–20 years of solid performance.

Schedule parging work between May and early October in Ottawa. The mix needs at least 7 days above 5°C for proper curing, and ideally the first two weeks should be frost-free. Late September jobs are risky if an early frost hits before full cure.

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Looking for experienced contractors? The Ottawa Construction Network connects Ottawa homeowners with qualified professionals:

• Justyn Rook Contracting
• JC Carpentry
• Dreamwood Construction & Renovations
• Vanguard Environmental
• Jaiko Cleaning Services

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