What would a contractor charge to strip old failing parging and apply new parging in Brampton?

A complete strip-and-re-parge job in Brampton typically costs $2,500 to $6,000 for an average detached home, covering removal of the old parging, surface preparation, bonding agent, and two-coat application of new polymer-modified parging. The final price depends on the linear footage of exposed foundation, the height of the foundation walls, how badly the old parging has deteriorated, and whether any underlying foundation repairs are needed.

Stripping old parging is labour-intensive work. The contractor uses a cold chisel, hammer, or small demolition hammer to chip away all loose, cracked, and hollow-sounding parging down to solid substrate. This step alone can account for 30-40% of the total project cost because it cannot be rushed — leaving any loose material behind means the new parging will delaminate in the same spots within a couple of winters. After stripping, the foundation surface must be cleaned of dust, debris, and any remaining loose material, typically with a wire brush and pressure washer. Many Brampton homes built in the 1970s through 1990s have concrete block foundations, which require extra attention during prep because old parging often pulls mortar from the block joints when removed.

Once the surface is clean and solid, the contractor applies a concrete bonding agent (SBR latex or acrylic-based) to the dampened foundation. This is absolutely non-negotiable — skipping bonding agent is the single biggest cause of parging failure in the GTA. The bonding agent creates a chemical bond between the old concrete and the new parge coat. Without it, the new parging simply sits on top of the old surface, and Toronto's 50-plus freeze-thaw cycles per winter will lift it off within one to two seasons.

For Brampton specifically, polymer-modified parging at $12 to $18 per square foot installed is the smart choice over traditional Portland cement parging at $8 to $12 per square foot. Brampton sits on heavy clay soil that holds moisture against foundation walls for extended periods, and the area gets the full force of GTA winter cycling without the moderating effect of Lake Ontario that downtown Toronto enjoys. The polymer additives give the parge coat flexibility to handle thermal expansion and contraction, better adhesion, and significantly improved freeze-thaw resistance. A properly applied polymer-modified parge coat will last 20 to 30 years in Brampton conditions, while cheap traditional parging applied without proper technique often fails in 3 to 5 years.

The application itself involves a base coat (sometimes called a scratch coat) applied to a thickness of 8 to 12mm, allowed to set, then a finish coat applied and textured to the desired finish. Total thickness should be 12 to 20mm. Applications thicker than 20mm require metal lath reinforcement fastened to the foundation, which adds $2 to $5 per square foot.

Timing matters in Brampton. Parging must be applied when temperatures stay consistently above 5 degrees Celsius day and night for at least 7 days after application. In Brampton, that window is typically mid-April through mid-October. The parge coat also needs to be kept moist for 3 to 5 days after application to cure properly — your contractor should mist it regularly and may cover it with plastic sheeting during hot summer days.

Always verify that your contractor carries WSIB coverage before work begins. Get at least three written quotes that specify materials, number of coats, surface prep methods, and warranty terms. Toronto Parging can match you with experienced local parging contractors for free estimates on your Brampton project.