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    Why Does Algae Grow on Siding?

    Jeremy Pagel July 22, 2026

    The Ideal Environment

    Algae thrives in damp, shaded areas. That's why you'll often see green growth on the north-facing side of your home or areas heavily shaded by trees. It feeds on the dust and organic material that settles on your siding.

    Killing the Root Cause

    Simply blasting algae off with water leaves spores behind, meaning it will grow back quickly. Our soft washing detergents actually kill the algae spores, ensuring a deeper clean that lasts significantly longer.

    Here at Grand Forks Power Washing, we use soft washing and pressure washing to clean housing exteriors in Grand Forks, ND, using the customer's own water to cut operational costs and pass the savings along to the customer.

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