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Choosing between traditional and synthetic stucco depends on your specific needs, budget, and climate. Both options are durable, but synthetic stucco includes an extra layer that makes it more resistant to cracking and a better choice for climates with extreme weather. In hot, dry climates with less rainfall, traditional stucco is a suitable and more affordable option that is less likely to trap moisture. Synthetic stucco also offers more color options and requires less maintenance.

It’s not advisable to use CLR on stucco. CLR is a powerful acidic cleaner designed for removing tough mineral stains. Stucco is a porous material commonly made of cement, lime, and sand. The acidic nature of CLR can potentially damage or etch the stucco surface, leading to discoloration or deterioration. 

It is best to use cleaning solutions specifically formulated for stucco or mild household cleaners mixed with water to clean stucco siding. Always test any cleaning product in a small, inconspicuous area before applying it to the entire stucco surface.

The decision to repair or replace stucco depends on the extent of the damage. For minor issues like small cracks, holes, dirt, stains, or discoloration, a repair is typically sufficient and more cost-effective. These issues can often be resolved with a simple repair, a deep clean, and possibly a new coat of paint. However, for more significant problems such as large cracks, peeling, mold, algae, or structural water damage, a replacement might be necessary. In these cases, it is best to call a professional stucco contractor for an inspection. An expert can assess the severity of the damage, determine if there are deeper issues, and advise whether a repair is adequate or if replacing a section or an entire wall is the more cost-effective, long-term solution.

You should aim to let stucco dry for at least 48 hours before it rains. While misting new stucco and keeping it moderately moist is important for strength and longevity, uncontrolled exposure to rain can lead to weak stucco that doesn’t bond properly. Rain can also affect the stucco finish and the color unevenly, leaving you with less appealing siding.