What is the cost of pressure washing new exposed aggregate steps after they cure in Ottawa?

Pressure washing new exposed aggregate steps in Ottawa typically costs between $150 and $400, depending on the size of the area, accessibility, and timing of the cleaning.

New exposed aggregate concrete requires careful pressure washing after the initial curing period to reveal the decorative stone surface properly. In Ottawa's climate, exposed aggregate steps should cure for a minimum of 7 to 14 days before pressure washing, though this timeline extends during cold weather. The pressure washing removes the surface cement paste that obscures the aggregate stones, creating the attractive textured finish that exposed aggregate is known for.

The process requires precise pressure settings — typically 1,500 to 2,500 PSI for exposed aggregate, which is lower than standard concrete cleaning. Too much pressure can dislodge the aggregate stones or create uneven surfaces, while too little pressure won't properly expose the decorative stone. Professional cleaners use specialized nozzles and maintain consistent distance and movement patterns to ensure even exposure across the entire surface.

Seasonal Considerations for Ottawa

Ottawa's extreme temperature swings significantly affect exposed aggregate pressure washing timing and costs. Spring cleaning from April through June represents peak demand as winter-delayed concrete projects rush to completion, potentially increasing prices by 10 to 20 percent during busy periods. Summer pressure washing dries quickly in Ottawa's heat but requires careful timing to avoid working during the hottest parts of the day when rapid drying can cause streaking.

Winter pressure washing of exposed aggregate is challenging but sometimes necessary for projects that must be completed before freeze-up. Water used in pressure washing can freeze in surface pores if temperatures drop below 5 degrees Celsius within 24 hours of cleaning. Professional contractors may add freeze-protection additives to wash water or use heated pressure washing systems during cold weather, which increases costs by $50 to $100.

Cost factors include the total square footage of steps, with typical residential front steps ranging from 20 to 80 square feet. Simple straight steps cost less per square foot than curved or multi-level designs that require more detailed work around edges and corners. Accessibility affects pricing — steps that require equipment to be carried long distances or worked around landscaping cost more than easily accessible front entrances.

For a standard set of residential front steps (approximately 30 to 50 square feet), expect to pay $150 to $250. Larger step installations or complex designs with multiple levels can reach $300 to $400. Always get written quotes that specify the PSI rating to be used, curing time requirements, and weather contingencies.

When hiring a professional makes sense for this specialized work, homeowners can browse pressure washing and cleaning contractors through the Ottawa Construction Network directory at justynrookcontracting.com to compare local options and pricing.