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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.

Wood clapboard siding needs frequent sealing to keep it in top condition—likely every two to three years. A sealant helps protect it from both moisture and sunlight damage. Your weather and climate will affect how often you need to seal the siding, but the pros recommend sealing it every couple of years. More durable woods in milder climates may not need to be sealed quite as often.

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.

Siding is one of your home’s first lines of defense against extreme weather. If you fail to repair or replace your damaged siding, your home is exposed to wind, snow, and rain—all of which can cause structural damage. Repairing your home’s structure will be much more costly and be a much bigger headache than simply keeping your siding in tip-top shape, so don’t delay—fix your siding ASAP.