Siding Problems with Stain, Mildew, and Paint

Today, siding is an excellent choice of material for making a home more beautiful, energy efficient, and protected. Even the best type of siding material and the highest quality installation does not mean the siding will become dirty. In fact, at some point in time, siding will end up stained, having problems with mildew, or even drips of paint. As you will discover below, you have a number of excellent options for correcting these problems.

Water Spots

For starters, hard water notoriously leaves spots on the exterior of brick or brick veneer siding. For instance, if you were hosing down the yard or watering the plants, you might accidentally spray the siding. In this case, you want to visit your local home improvement store or masonry dealer to purchase acid-based brick cleaner. Then, al you need to do is follow the simple instructions provided on the package.


Another problem that is seen with siding is paint accidentally dripped onto the surface. In this case, a person might have painted a soffits, gutters, or trim, only to have some of the paint dribble down onto the siding. The best solution is to spray the area of the siding with a regular garden hose. Then in a bucket, mix two pounds of trisodium phosphate and allow it to set for a while. In about 30 to 60 minutes, depending on the intensity of the paint, use a stiff, nylon bristled brush to scrub the pain off. If the paint does not come off the first time, you may need to repeat this process more than once.


Stucco is a beautiful option for siding, giving a home a Spanish or Mediterranean look. In most cases, stucco is strong and durable, making it a top choice. However, sometimes stucco can become stained or weathered, taking away its beauty. For this, you will need to have the exterior walls re-dashed, which means a stucco contractor would come and apply a new coat over the dirty area. In addition, if you have white stucco siding, then you could create a whitewash solution, which is a mixture of water and white Portland cement. Although this could be done by the homeowner, we suggest you have it done by a professional for the best results.


Finally, if you find that your siding is showing signs of mildew, we recommend you first start with a power washer to see if it can be removed that way. If the black spots do not disappear, then you know the problem is indeed mildew. Therefore, you want to mix one part of bleach to four parts of water in a bucket. Using a stiff, nylon bristled brush, scrub the area affected by the mildew. Most importantly, when you go through this process is to always, wear long sleeves, long pants, gloves, and protective eyewear.