What maintenance schedule should I follow for interlock in Vancouver's climate year-round?

Interlock maintenance in Metro Vancouver requires a proactive, season-specific approach due to the region's persistent moisture, heavy winter rainfall, and ideal conditions for moss and weed growth. Following a structured maintenance schedule prevents costly repairs and keeps your paver installation looking its best year-round.

Spring Maintenance (March-May) is your most important maintenance window. After Vancouver's wet winter season, inspect your entire paver installation for winter damage. Look for sunken or shifted pavers, eroded joint sand, and moss or weed growth that established during the rainy months. Power wash the entire surface using a pressure washer with a rotating surface cleaner attachment — this removes accumulated moss, algae, dirt, and organic debris. Keep pressure under 2,500 PSI to avoid damaging paver surfaces. After cleaning and allowing 48 hours to dry completely, replenish polymeric sand in any joints that appear empty or where weeds are growing through. Spring is also the ideal time to apply pre-emergent weed preventer to inhibit summer weed growth.

Summer Maintenance (June-August) focuses on spot treatments and preparation for the rainy season ahead. Hand-pull any weeds that emerge despite spring prevention efforts — removing them while small prevents root establishment and seed production. Apply iron sulphate-based moss killer to any moss patches that survived spring cleaning, particularly in shaded areas under trees or on north-facing surfaces. Summer's dry conditions make this the optimal window for paver sealing if your installation is 12+ months old and efflorescence has stopped appearing. Clean pavers thoroughly, ensure joints are properly filled with polymeric sand, and apply sealer during a guaranteed 48-hour dry period.

Fall Maintenance (September-November) prepares your interlock for Vancouver's challenging winter weather. Remove fallen leaves promptly — wet leaves create slippery surfaces and trap moisture against pavers, promoting moss growth and staining. Clean gutters and redirect downspouts away from paver areas to prevent concentrated water flow that erodes joint sand and saturates the base. Apply a second treatment of moss killer in October before the heavy rains begin, focusing on problem areas identified during the summer. Inspect and clean drainage systems around your paver installation to ensure winter runoff has clear pathways.

Winter Maintenance (December-February) is primarily safety-focused during Vancouver's wettest months. Remove moss growth immediately as it creates dangerously slippery surfaces on walkways and steps. Use a stiff brush and oxygen bleach solution rather than pressure washing in freezing conditions. Avoid using rock salt or ice melter on pavers — Vancouver's mild winters rarely require de-icing, and salt accelerates polymeric sand deterioration. Instead, use sand for traction on icy mornings. Monitor for ice dams or standing water that indicates drainage problems requiring spring attention.

Annual Deep Maintenance should be performed every 3-5 years depending on your installation's exposure and traffic levels. This includes complete polymeric sand replacement — removing all existing joint sand, cleaning joints thoroughly, and applying fresh polymeric sand throughout the installation. Polymeric sand in Metro Vancouver's wet climate typically needs replacement every 3-4 years compared to 5-8 years in drier regions. Professional cleaning and sealing every 5-7 years maintains surface protection and enhances colour retention, particularly for installations exposed to heavy rainfall and UV exposure.

Problem Areas Requiring Extra Attention include north-facing surfaces that receive limited sunlight and stay moist longer, areas under large trees where organic debris accumulates, and low spots where water pools during heavy rainfall. These areas may need monthly moss treatment during the wet season and more frequent joint sand inspection.

Signs That Indicate Immediate Professional Attention include multiple pavers that have settled or shifted (indicating base problems), persistent standing water after rainfall (drainage issues), or widespread joint sand loss across large areas. These problems worsen rapidly in Vancouver's climate and require professional assessment to prevent costly structural repairs.

The key to successful interlock maintenance in Metro Vancouver is staying ahead of moisture-related problems rather than reacting after damage occurs. Regular cleaning, prompt moss and weed control, and maintaining proper joint sand levels prevent the base saturation and structural issues that plague neglected installations in this climate.

Need help finding an interlock maintenance professional? Vancouver Interlock can match you with experienced contractors who understand Metro Vancouver's unique climate challenges.

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

• Vancouver Safety Surfacing Ltd
• I love kitchens LTD
• Heilman Renovations