01/14/2026
Your home doesn’t “stay clean” over winter.
During summer, humidity, morning dew, and shade create the perfect environment for algae, mold, and mildew to begin growing on siding, roofs, and exterior surfaces. That moisture allows organic buildup to take hold long before it becomes obvious.
Once winter hits, snow, melting ice, and trapped moisture keep those contaminants in place. Rooflines, shaded siding, and north-facing areas stay wet longer, which allows growth to continue breaking down surfaces beneath.
That’s why homes often look worse in early spring, not because the problem is new, but because it’s been developing all along.
Understanding what’s happening to your exterior is the first step to protecting it.
