Green Algae On Siding

Use a brush to scrub the algae from the surface of the vinyl siding.

Green algae on siding.

I simply dissolved the powder in warm water poured it into a simple garden hand pump. Algae feeds especially well on sugar. The photo at above left shows green algae on vinyl siding. Take care to get as little soap as possible beneath the siding.

These stains occur naturally over time. If you have a lot of trees on your lot or if you have an abundance of woody plants these plants will leave a slight film of sugar deposits on your siding over time especially during spring when pollen and sap are running. Black stainsare usually a sign of mildew algae mold or fungus. Yellow stainsmean you probably have damaged insulation or deteriorating sheathing behind the siding.

Algae may also look black or brown as may some molds. Last weekend i mixed up some oxygen bleach to clean algae from my lower deck and from the deck railing. Algae on vinyl siding occurs because organic materials such as dust dirt pollen bird droppings and spider webs accumulate on the siding and algae uses it as a food source. Green stains on siding are usually the result of mold mildew algae or moss.

Green growth on your siding happens because your siding is not clean. As with any type of exterior finish vinyl siding can become dirty over time due to an accumulation of dirt and grime most of which can be removed with a simple spray of the hose but if you notice the appearance of green stains during your inspection you ll need to take a different approach. You re most likely to see green stains on siding that is inadequately ventilated. Green stainsare almost always the result of algae or moss.

You may have noticed a green growth on your vinyl siding or gotten an hoa violation letter notifying you that your siding needs to have the green growth cleaned off. When house siding begins to turn green it diminishes the exterior appearance of the home.