How do I prep my Vancouver pavers before sealing?

Proper paver preparation is absolutely critical for successful sealing in Metro Vancouver — rushing this step ruins the sealer application and wastes your investment. The key steps are thorough cleaning, joint sand replenishment, complete drying, and timing the application between rain events.

Start with a comprehensive cleaning process. Pressure wash your pavers with a standard residential pressure washer (1,500-2,500 PSI maximum — higher pressure damages paver surfaces). Use a rotating surface cleaner attachment to avoid striping and ensure even cleaning. This removes moss, algae, dirt, oil stains, and efflorescence (white powdery residue). Pay special attention to moss removal, which is Vancouver's biggest paver maintenance challenge due to our persistent moisture and mild temperatures. Apply an oxygen-based cleaner or commercial paver cleaner for stubborn stains — avoid chlorine bleach as it damages polymeric sand and surrounding vegetation.

Address joint sand issues before sealing. Inspect all paver joints and replenish polymeric sand where needed. Vancouver's heavy rainfall (over 1,200mm annually) gradually washes out joint sand, and empty joints allow pavers to shift and weeds to establish. Sweep out loose or contaminated sand from joints, then apply fresh polymeric sand (Techniseal, Alliance, or Sakrete brands perform best in our wet climate). Activate the polymeric sand with controlled water application — not flooding — and allow it to cure for 24-48 hours before proceeding with sealing.

Timing is everything in Metro Vancouver's marine climate. Your pavers must be completely dry for at least 48 hours before sealing, and you need a guaranteed dry weather window of 24-48 hours after application. Check the extended forecast carefully — even light rain within 24 hours of sealing can cause white hazing, poor adhesion, and patchy appearance. The optimal sealing window is typically May through September when we have longer dry periods.

Check for efflorescence on newer installations. If your pavers are less than 12 months old, look for white chalky residue on the surface. This calcium carbonate leaching is normal but must stop completely before sealing, or you'll trap it permanently under the sealer film. Wait until efflorescence has ceased naturally through weathering.

Final preparation steps include removing all furniture and planters from the area, protecting adjacent landscaping with plastic sheeting, and ensuring you have proper application tools. Most paver sealers require both spray application and back-rolling with a 3/8-inch nap roller for even coverage. Test the sealer on an inconspicuous area first to confirm the desired appearance — some sealers provide a natural look while others create a wet or glossy finish.

Professional sealing typically costs $3-7 per square foot in Metro Vancouver including cleaning and preparation. For a 400 sq ft patio, expect to pay $1,500-$3,500 for professional cleaning, joint sand replenishment, and two-coat sealer application. DIY sealing is feasible for homeowners comfortable with spray equipment, but the preparation work is the same whether you hire a pro or do it yourself.

Hire a professional if your pavers have significant staining, if you're uncomfortable with pressure washing equipment, or if your installation has complex drainage issues that need addressing before sealing. Proper preparation determines sealer longevity — rushing this process to save time typically results in sealer failure within 1-2 years instead of the expected 3-5 year lifespan.