My neighbor taught me this trick to clean green algae off siding with 0 effort. Here’s how it works

pressure is not always better.

 

Used incorrectly, high-pressure water can:

force moisture behind siding
damage paint
mark softer materials

loosen panels
damage caulking around windows and doors

For ordinary algae, allowing an appropriate cleaner to do most of the work is often safer than trying to blast the stain away.

If you do use a pressure washer, follow the siding manufacturer’s recommendations and use the lowest effective pressure.

What About Household Bleach?

 

Diluted chlorine bleach is sometimes used for exterior algae and mildew, but it requires extra caution.

It can