Q The underground sprinkling system of our new home sprayed on two windows and the siding. There are no yellow or orange iron deposits, just white water spots. What can I use to clean them? — J.R., ...

This time of year, I am inundated with questions about how to clean algae from every conceivable outdoor surface. Let’s start with why algae thrives on our homes in the first place. Algae needs food ...

We may receive a commission on purchases made from links. If you live in a humid place, there's a very good chance you'll have algae buildup on the siding of your home, particularly on the northern ...

Q. My house is now 25 years old. It’s covered with vinyl siding. Every summer, mold and mildew develops on the north side of my house. Every few years I remove it. Is there some coating I can apply to ...