How do I sweep my Ottawa driveway clean before sealing?

Proper surface preparation is absolutely critical for sealcoat adhesion — a dirty driveway will cause the sealer to peel and fail within months instead of lasting 2-3 years. Start with a thorough sweep using a stiff-bristled push broom to remove all loose debris, leaves, and dirt, then follow with detailed cleaning of stains and cracks.

Begin with basic debris removal using a leaf blower or stiff push broom to clear all loose material from the surface. Pay special attention to the edges where dirt and organic debris accumulate against the house foundation, garage walls, and landscaping. Remove any weeds growing through cracks — pull them by hand or use a weeding tool, as herbicides can leave residues that interfere with sealer adhesion. Clear all items from the driveway including vehicles, garbage bins, lawn furniture, and children's toys.

Address oil stains and embedded dirt with a pressure washer if available, or scrub stubborn areas with a stiff brush and degreasing detergent. Oil stains must be completely removed — sealer will not adhere over petroleum residues. For fresh oil spills, absorb with cat litter first, then scrub with dish soap and hot water. For older stains, use a commercial concrete/asphalt degreaser following manufacturer instructions. Rinse thoroughly and allow the surface to dry completely before proceeding.

Clean out all cracks wider than 5mm using a putty knife, wire brush, or compressed air to remove loose debris, vegetation, and old crack filler. These cracks must be filled with rubberized crack filler before sealcoating — sealer alone will not bridge gaps and the cracks will telegraph through within one Ottawa winter. For cracks wider than 10mm, install backer rod before applying crack filler to prevent the filler from sinking too deep.

Ottawa's climate makes thorough cleaning even more important because freeze-thaw cycles loosen surface debris that may not be visible but will prevent proper sealer bonding. Salt residue from winter deicing must be completely removed — rinse the entire surface with clean water and allow to dry if salt staining is visible. The surface must be completely dry before sealer application, which typically means waiting 24-48 hours after any washing in Ottawa's humidity.

Time your cleaning for optimal sealing conditions — temperatures should be above 15°C with no rain forecast for 24-48 hours. Early morning cleaning followed by afternoon sealing works well, giving the surface time to dry completely. Never apply sealer over a damp surface, as moisture prevents proper adhesion and the sealer will peel within weeks.

A properly cleaned and prepared driveway ensures your sealcoat investment provides maximum protection against Ottawa's harsh freeze-thaw cycles and road salt exposure. Need help finding a driveway contractor for professional sealing? Ottawa Driveways can match you with local paving professionals through the Ottawa Construction Network.