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Professional installers typically recommend caulking between siding boards, but it depends on the material. With Hardie board and fiber cement siding, manufacturers don't recommend adding caulk because it can trap moisture in the joints or discourage flexibility in fluctuating temperatures. Consult your local siding contractor about caulking best practices before adding any to your home’s exterior.

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.

Although dish soap will work to clean some of the grime off the aluminum siding, it may not kill mold and mildew as efficiently as a cleaning solution you can buy at a hardware store. If you have oily or greasy substances on the aluminum siding, rather than mold and mildew, dish soap should work extremely well.

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