Exterior House Mold

Exterior House Mold is a concern for many homeowners. Worried about the structural effects of mold growth, homeowners across the world are continually looking at ways of reducing and eradicating mold growth on their house. Well, the good news is that exterior house mold is completely harmless in terms of structure, although it is not attractive, and can leave your house looking run-down or old.

The mold is usually a result of excess moisture in the exterior walls, which is not a particularly difficult problem to solve; one that can be cured with a simple coat of protective paint or varnish.

Identifying Mold Growth

Exterior house mold is relatively easy to spot, and is a common problem for many homeowners across the world. Usually the side of your house most sheltered from sunlight will run the greatest risk of developing mold. This is because the moisture retained within the walls is not dried out by the sunlight, and thus harbors the growth and spread of the mold.

You should be looking for patches of furry green, brown or black substance on your wall. Additionally, it may also appear as an unexplained powdery patch, and if this is on a sheltered side of your building, chances are you have got mold of some sort. Thankfully, the problem does not cause any structural of internal damage if treated promptly, and can be easily controlled and rectified, so it is purely the aesthetic impact of mold which should cause any distress.

Ridding your House of Mold

Although initially harmless, exterior house mold can be a sign of deeper structural decay, and if untreated, can lead to further problems. That is why it is important to rid your exterior of mold as soon as you identify it. The first thing to do is ensure you deeply clean the area of mold, ensuring that the spores and bacteria which cause the growth are removed.

Furthermore, use of a strong bleach will kill off the chances of any remaining bacteria, and also work towards removing the unsightly appearance of mold on your wall. After removing the current mold growth, it is important to take preventative measures to ensure that the problem does not return and the potential structural damage to your home is kept to a minimum.


Exterior house mold can be caused by excess moisture which is harboured within the walls. The best method, therefore of preventing mold is to try an ensure the sheltered area is kept as dry as possible, perhaps through the use of a guttering system, or the construction of an overhang to shelter the wall from the rain.

Another good way to ensure this is by using protective varnish or paint, available at any good hardware store. This will serve to protect the surface from water and moisture, and will also hinder the growth of any bacteria or spores which could lead to a re-appearance of the unattractive mold.

So now you know exterior house mold is not the end of the world, but it is worth remembering that it can cause some more serious problems if it is untreated. Try out the preventative measures before you experience the mold, and take caution to limit chances of growth through keeping your walls dry. If you do suffer from mold, make sure you clean and treat the area effectively to rid your house of the signs of damp that leave it looking shabby and run-down.

See Also:

Basement Mold