What is the Green on My Home?
If you’re a Connecticut homeowner, you’ve probably noticed green or black stains slowly spreading across your siding, roof, or deck. These stains aren’t just dirt — they’re living growths like algae, mold, and mildew that thrive in our humid New England climate. Left untreated, they can damage your home’s exterior, hurt curb appeal, and even lead to costly repairs. At Pura Softwash, we provide gentle, eco-friendly house washing in Connecticut that removes all organic staining — without the damage caused by high-pressure washing. Whether it’s green algae on your siding, black streaks on your roof, or mildew on your patio, our proven soft washing system kills the growth at its source so your home stays cleaner for longer. One of the most common causes of green staining is Gloeocapsa magma, a type of algae that loves shaded, moist areas. Mold and mildew often show up alongside it, creating dark, blotchy patches that can spread quickly. Our soft wash process completely eliminates these stains and sanitizes the surface, restoring your home’s beauty without harsh scrubbing or high-pressure damage.
Instead of blasting away at your home with high-pressure water — which can strip paint, damage siding, and void roof warranties — our soft washing method uses low-pressure pumps combined with specialized biodegradable cleaning solutions. These solutions break down and kill the algae, mold, mildew, and other organic growth at the root, ensuring a deeper clean that lasts longer. The gentle pressure rinses away all residue, leaving your home spotless without risk to the surface. Plus, the treatment continues working after we leave, helping to slow future growth.
While we can remove nearly all organic stains, there’s one stubborn invader that even our soft wash can’t erase: artillery fungus (Sphaerobolus stellatus). Found in wood mulch, this fungus shoots out sticky black spores that cling to siding, cars, and windows. Once they harden, they’re almost impossible to remove without damaging the surface. The best defense against artillery fungus is prevention. If you have mulch beds close to your home, consider using alternatives like stone, rubber mulch, or treated bark that’s less likely to host the fungus. Regularly replacing or turning mulch can also help reduce the risk. Green algae, black mold, and other organic growths don’t just make your home look dirty — they can shorten the life of your exterior surfaces. Pura Softwash is here to help with safe, professional house washing throughout Connecticut, keeping your home clean, healthy, and protected.