Parging Questions, Answered

Parging is a thin cement-based coat troweled over an exposed foundation or masonry wall. It smooths the rough surface, hides imperfections, and adds a protective layer against surface moisture and weather.

A well-applied parge coat that isn't heavily exposed can last 20+ years. Areas that take a lot of water and road salt — like front steps and garage piers — wear faster and may need refreshing sooner. Proper prep and slow curing are what make it last.

The surface sets within a few days, and we keep it damp during that time so it cures slowly and strong. Full chemical curing continues for weeks, and the colour may look slightly blotchy until it fully evens out.

No. Before we start, we mask and protect everything around the work area — windows, doors, railings, siding, walkways and landscaping. We work to clean, straight cut-lines so only the intended surface is touched.

Mild, above-freezing weather is ideal — roughly spring through fall. Parging shouldn't be applied in freezing or extreme heat, since temperature affects how the coat bonds and cures.

Parging is a surface coat, not a structural repair. We patch cracks and voids as part of the prep so the finish looks and holds up well, but a moving or structural crack needs proper repair first — which we'll flag during the inspection.

Yes — estimates are always free and no-obligation. Call or WhatsApp us and we'll take a look.

Parging is the process of applying a thin coat of mortar (a mixture of cement, sand, and lime) to the exterior of a home's foundation walls. It serves both a protective and an aesthetic purpose, covering the raw concrete and providing a smooth, finished look.

Ottawa experiences extreme temperature fluctuations and heavy freeze-thaw cycles. Parging acts as a sacrificial layer that protects the structural concrete of your foundation from moisture penetration and weathering, which prevents the concrete from spalling or cracking over time.

You should look for signs of deterioration such as visible cracks, peeling sections, bubbling, or areas where the mortar is crumbling away from the foundation. If you see exposed concrete or gaps where water can seep in, it is time to call a professional.

The ideal window is from late spring to early autumn. Because mortar requires specific temperature ranges to cure properly, applying parging during the freezing winter months or excessively hot, dry days can lead to cracking and poor adhesion.

While parging provides a layer of protection against moisture and wind, it is not a complete waterproofing system. It is designed to shed water away from the wall, but for serious leak prevention, it should be used in conjunction with a proper weeping tile system and waterproofing membranes.

No. For a long-lasting bond, any loose, peeling, or damaged old parging must be chipped away and removed. Applying new mortar over a failing base will result in the new layer peeling off quickly.

Parging is specifically applied to the foundation walls (the base of the home) to protect the concrete. Stucco is a decorative finish used on the upper walls of a house to provide insulation and a specific architectural look.

For most standard residential homes in Ottawa, the process takes between one and three days. This includes the preparation phase (removing old material), the application of the mortar, and the necessary curing time.

The total cost depends on the perimeter size of your foundation, the amount of old parging that needs to be removed, the current condition of the concrete, and the type of finish (smooth or textured) you choose.

With professional installation and high-quality materials, a parging job typically lasts between 10 and 20 years. However, periodic inspections are recommended to catch small cracks before they become major issues.