The Best Time to Soft Wash Your House in Durham Region

There's no bad time to clean a genuinely dirty house, but there is a smart time. In Durham Region, the calendar and the climate line up to make spring and fall the two best windows for soft washing. Here's the reasoning.

Why algae loves our climate

Southern Ontario summers are warm and humid, and Durham sits close enough to Lake Ontario to hold moisture in the air. Warmth plus moisture is exactly what algae and mildew need. That's why the green film on north-facing siding and the black streaks on roofs seem to appear over a single wet summer.

Spring: start the season clean

A spring wash clears off everything that built up over a long, damp winter and through the freeze-thaw cycles. It's the most popular window for a reason — the house looks its best heading into patio season, and knocking the growth back early means less of it to deal with later in the year.

Fall: protect through winter

A fall wash matters more than most people realize. Algae and mildew that go into winter alive will sit against your siding and shingles under snow and ice for months, holding moisture the whole time. Killing the growth before the cold sets in protects the surface through the worst part of the year and gives you a head start next spring.

Selling your house? Book the wash before the listing photos, not after the sign goes up. Clean siding and a streak-free roof are the cheapest curb-appeal upgrade there is.

What about summer and winter?

• Summer — perfectly fine, and often the fastest to book around a party or event
• Winter — soft washing needs above-freezing temperatures, so it's the off-season
• Roof algae — worth treating as soon as you notice streaks, any workable season

The honest takeaway: don't overthink the timing. If the house needs it, book it. But if you're planning ahead, spring and fall give you the best-looking result and the longest-lasting one. We book those windows up early, so it's worth getting on the calendar before the rush.