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You may only need to repaint fiber cement siding every decade or so, but you should clean it every six to 12 months, depending on your local climate. First, wash with a garden hose or similar low-pressure device (not a high-pressure washer, which can damage the material) to remove dirt and any large debris. Then, gently wipe down the surface with a soft brush or cloth in a side-to-side motion, following the grain of the fiber cement.

Bleach can be an option if you want to kill mold and mildew clinging to your siding. However, you must water bleach down to the right concentration of a 1/2 cup of bleach per gallon of water to avoid damaging your siding. Bleach can also harm plants in your yard and isn’t safe to use near pets, so employ it with caution.

Local pressure washing services often offer non-bleach options that can powerfully remove mold and mildew.

You should plan to stain or refinish your home's cedar siding every three to seven years to maintain its appearance and provide maximum protection, though some estimates suggest a range of four to six years. The exact frequency depends on several factors, including your local climate, exposure to severe weather like direct sunlight, rain, and wind, the quality of the initial stain application, the type of stain used, and the overall condition and quality of the wood.

For homes in harsh climates with high humidity and significant sun exposure, you should plan on staining as often as every three years, while those in milder locations may only need to do so every seven years. For the longest-lasting protection in particularly harsh climates, consider using an opaque stain.

If you are looking for a lower-maintenance alternative, you might consider vinyl or aluminum siding. While the initial installation cost can be higher, they do not require as much upkeep and can offer more value over time, especially in areas with excessive rainfall or high humidity.

Contrary to popular belief, people still do use aluminum siding for their homes—but it’s much less popular than it was in the mid-1900s. The introduction of various types of vinyl siding as an affordable option reduced the demand for aluminum, which is prone to scratching and denting and needs to be repainted every five to 10 years. Given the abundance of house siding options, especially newer and more popular types like stone veneer siding, aluminum siding has simply just fallen out of favor.