Green And Black Residue On Painted Aluminum Siding

To test whether a stain is grime or mildew try washing the stain away with water and a detergent like spic and span.

Green and black residue on painted aluminum siding.

If you are cleaning an aluminum pot fill the pot with water then add 2 tablespoons 29 57 ml for every quart of water. As long as the siding is clean you won t need to use a primer unless raw metal is exposed. Maintenance is the first step to preventing the build up of moss algae and mold. This concentrated cleaner is fantastic for making old homes look new again and adds an extra layer of corrosion protection once it dries to help prevent future damage and issues.

Aluminum siding cannot rust and it s a very durable material however there are numerous things that can cause it to oxidize. If the stain doesn t wash away with water and detergent it s probably mildew. Also known as artillery or cannonball fungus sphaerobolus it uses internal water pressure to forcefully fire its spores similar to seeds up to 20 feet away the fungus sets its sights on bright areas so that means it will aim for any pale surface that reflects light such as the siding on your house. Test a small area of the green stains to be sure that the tsp solution will remove the stains.

Or you could wash it by hand with tsp or a similar product available at home centers and paint stores and rinse it thoroughly. Refer to the label on the trisodium phosphate for specific mixing instructions. Oxidization can make the aluminum siding look ugly and it needs to be removed as quickly as possible. It s hard to see shotgun fungus itself because it s only 2 millimeters wide.

The best way to get this siding clean is to power wash it. Bring the water and vinegar to a boil and let the boil roll for 15 minutes then pour out the liquid. Usually green stains disappear in 2 3 weeks and black stains come clean in 4 6 weeks. Mix a solution of trisodium phosphate and warm water into a large bucket.

Trisodiium phosphate per two gallons of water. There are many different things that you can do to clean your aluminum siding and remove the back oxides. Once the siding is clean most people don t see any regrowth for up to a year or longer. Wet forget removes growth along with any staining the growth may have caused.

Watch as lou manfredini ace s home expert shows you an easy and affordable way. Aluminum is not vinyl however so whether you are scrubbing or spraying go gentle or your siding with dent. A brown gray or black stain on siding or trim may be simple grime or it may be mildew. You may have to do this process a few times to eliminate all oxidation.