Pressure washing is, in fact, one of the few cleaning methods that can damage your fiber cement siding. Though durable, the material cannot withstand high water pressure. Always follow the manufacturer’s instructions and use the appropriate cleaning solution when cleaning If you are dealing with stubborn stains, use a scrub or metal-bristle brush, or leave it to a professional.

Mildew grows into porous wood, making it more difficult to remove than regular dirt (and more destructive). We suggest using a dedicated mildew and mold fungicide to remove mildew, which is found in any local home improvement store. Apply a dose of the fungicide to the siding and leave to work according to the instructions, usually for an hour or two. Then wash it thoroughly away and scrub the spot again. Repeat the process if necessary. If nothing is removing the mildew stains, you should plan on removing those clapboard planks in time, as their damage could cause future problems.

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.

Different types of siding provide unique aesthetic and structural features, with each material commanding its own cost. Availability of materials and shipping costs also factors largely into the cost. The common types of siding materials include:

• Stucco: $7–$9 per square foot

• Wood: $1–$15 per square foot

• Engineered wood: $1–$6 per square foot

• Aluminum: $3–$6 per square foot

• Fiber cement: $5–$14 per square foot

• Brick: $10–$20 per square foot

• Brick veneer: $3–$10 per square foot

• Stone: $7–$30 per square foot

• Stone veneer: $5–$11 per square foot