🧼 3. DIY Detergent Clean
Mix dish soap and water — great for mild algae buildup:
Mild algae buildup on siding, ready for detergent cleaning.
- Spray the mixture
- Let it sit
- Rinse thoroughly
For thicker or older algae patches, use a soft-bristled brush with the cleaner to help lift residue.
🚫 4. Avoid Strong Pressure Washing
While pressure washing may seem fast, it can:
- Force water behind siding
- Cause internal damage
- Void warranties
- Strip paint or textured siding surfaces
Experts recommend using low-pressure “soft wash” techniques instead.
🧰 Tools & Materials You’ll Need
- Garden hose or sprayer
- Soft-bristle brush
- Oxygen bleach or diluted vinegar
- Gloves and safety glasses
- Protective plastic for nearby plants
A homeowner spraying a cleaning solution using a handheld sprayer — perfect for tackling algae.
🛡 Tips to Prevent Algae from Returning
Once your siding is clean, here’s how to keep it that way:
✔ Trim trees and bushes near your house
✔ Repair faulty gutters or downspouts
✔ Apply a siding-safe sealant
✔ Clean regularly (once or twice a year)
🔎 Before & After — Real Examples
Here’s another real example of algae removal done right:
Left: siding before cleaning (green algae heavy) — Right: siding after cleaning, restored and bright.
This kind of transformation highlights just how effective simple cleaning methods can be — even without a pressure washer!
📝 Final Thoughts
Green algae on siding may look like a stubborn eyesore, but the good news is that you don’t need expensive tools or professional help to remove it.
With the right mixture — whether it’s oxygen bleach, vinegar solution, or mild detergent — and a bit of patience, your siding can look fresh and clean again.
