Stucco siding is fairly resistant to stains from fungus, rot, and exposure to the weather. However, staining and discoloration may still occur. The complexity of the removal process depends on what kind of stain you are dealing with. The age of the stain and whether it has set also play a part. Because of this, you should always address discoloration as soon as you notice it.

Stained Stucco Siding

What to Use

There are many products that purportedly work to remove stains on stucco. However, the preferred method generally includes the use of a dilute solution of the following:

1 cup of TSP (trisodium phosphate)

Apply the solution with a pump sprayer for large areas or just pour it on for smaller stains. Rigid brushes could potentially damage some stucco surfaces. Always use a soft bristled brush for scrubbing.

For the rinsing stage, use a fairly gentle spray of water from a garden hose. If you decide to use a high pressured sprayer, don’t exceed a PSI of 1500. The durability of stucco varies from one manufacturer to the next, so don’t assume that yours will stand up to pressurized spraying.

Additional Information

Protect the surrounding ground from chemicals whenever possible. Soil may not sustain plants for several years after being soaked with TSP. Vegetation may be harmed or killed by exposure to this solution.

Wear protective equipment to keep the stain remover from coming into contact with your skin or eyes.

Other potential cleaning products include muriatic acid (another name for hydrochloric acid), CLR, stone wash, Jomax, lime wash and a variety of specially designed stucco wash. Follow the manufacturer’s directions and safety precautions when using any of these products. Light sand blasting of especially difficult stains should only be used a last resort.

Related posts:

1. Stuck on Stucco – Durable Home Siding
2. Stucco Siding As A Canvas For Outdoor Murals
3. Is Ivy Eating Your Siding?
4. EcoClad Recycled Siding – For Greener Homes
5. Treating Stains and Mildew

Tags: Siding

This entry was posted on Thursday, February 18th, 2010 at 2:58 pm and is filed under Siding. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.