What pressure settings are safe for cleaning new pavers after installation in Ottawa?

There is no single safe number for every paver, so the best guide is the paver and joint-sand manufacturers' instructions, which your installer can share. As a general rule, new pavers should be cleaned at a moderate pressure with a wide fan tip, starting at the lowest setting that works and increasing only if needed. Wait until the polymeric sand between the joints has fully cured — the sand product's instructions give the cure time — before any pressure washing. High pressure or a narrow pinpoint nozzle on newly installed pavers is the fastest way to blast out the joint sand, shift individual pavers, and create an expensive repair.

The polymeric sand between paver joints is the most vulnerable part of a new paver installation. This sand contains a binder that activates with water and hardens to help lock pavers in place and discourage weeds. In Ottawa, where freeze-thaw cycles put stress on paver installations through the winter, intact joint sand matters for the long-term condition of your driveway, walkway, or patio. Pressure washing that dislodges the sand leaves gaps where water, frost movement and weeds can get in, and re-sanding adds labour and material cost, so protecting it during cleaning saves money.

When pressure washing new pavers, technique matters as much as the pressure setting. Hold the wand at an angle to the surface rather than pointing straight down, and move in smooth sweeping motions that follow the direction of the paver joints rather than cutting across them. A surface cleaner attachment — the spinning disc type — is ideal for pavers because it distributes pressure evenly across a wide area without concentrating force on any single joint. Keep the wand or surface cleaner moving at all times and never hold it in one spot.

Clay-heavy mud is a common challenge on new paver installations. Construction activity tracks sticky mud onto paver surfaces, where it settles into the textured face of the stone. Once it dries, especially after baking in summer heat, it can bond tightly and resist gentle washing. A mild cleaning solution suited to pavers, applied before washing, can help loosen the mud so it rinses away without turning the pressure up. Ask the crew what product they plan to use and whether it is safe for your paver type.

After pressure washing new pavers, inspect every joint carefully. Even at gentle pressures some joint sand can wash out, and it should be topped up promptly. If your pavers were installed in fall and you plan to clean them, finishing the work well before the first hard freeze gives any replacement sand time to cure before winter. For new paver installations that need post-construction cleaning, a crew with paver experience is worth it. You can find independent cleaning companies through the Ottawa Construction Network directory at justynrookcontracting.com.

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

• 613Bins
• JC Carpentry
• Ottawa Caulking
• BFI Renovations
• The Deck Store Inc