What is The Best Thing to Clean Decking with in Toronto ?
Because Toronto experiences highly humid summers, wet springs, and freezing winter freeze-thaw cycles, decks in the Greater Toronto Area are particularly vulnerable to deep-seated mold, mildew, and structural graying.
The Top Cleaning Choice in Toronto Canada: Oxygen Bleach-Based Cleaners
Unlike harsh chlorine bleach, which damages wood fibers and destroys the lignin holding the wood together, oxygen bleach (sodium percarbonate) kills organic spores from the inside out without ruining the deck's integrity.
According to a comprehensive guide by Balcony Cleaning Toronto, oxygen bleach breaks down the heavy mold and algae buildup typical of Toronto’s climate. It lifts deep grime while remaining safe for surrounding lawns, gardens, and condo balcony planters.
Behr Premium All-In-One Wood Cleaner (No. 63):
Available locally at The Home Depot Canada, this formula is highly rated for restoring weathered wood to its natural color while stripping out tannin bleed, rust stains, and heavy mildew.
Defy Wood Deck Cleaner or Restore-A-Deck Kits:
Recognized by TreatedWood.com and DeckStainHelp as industry leading, these oxygen-powered powders open the pores of the wood, preparing it perfectly for a fresh coat of penetrating oil or water-resistant sealant.
Wet & Forget / 30 Seconds Outdoor Cleaner:
Popular retail options across Canadian hardware stores (like Canadian Tire) used primarily for non-scrubbing maintenance to keep green slime and winter moss at bay.
How to Clean Your Toronto Deck Safely
To successfully tackle the grime built up from the seasons, local experts recommend the following procedure:
- Check the Temperature: Do not wash your deck if it is below 10°C. Cold temperatures significantly reduce the chemical effectiveness of oxygen bleach. Late spring (May/June) or early autumn (September/October) are the ideal windows.
- Apply and Dwell: Mix the oxygen bleach with warm water, apply it generously to the wood, and let it sit for 10–15 minutes. Ensure it stays wet (mist it lightly with a hose if it’s a hot, sunny day).
- Scrub with the Grain: Using a stiff-bristle nylon brush, always scrub with the wood grain. Scrubbing against the grain raises the wood fibers, leaving the surface rough and even more vulnerable to catching winter moisture.
- Rinse Gently: Rinse thoroughly using a garden hose with a spray nozzle. If using a pressure washer, keep it below 1,200 PSI to avoid permanently etching or splintering the boards.