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Composite siding has excellent insulative properties and one of the highest R-values of siding materials available. Its R-value is 2 to 4; compare that to vinyl, wood, and fiber cement—all of which have R-values under 1. You can boost your siding’s R-value by installing a layer of foam insulation. 

You can put new siding over clapboards, but it’s not recommended. Some sidings, like vinyl siding, can go over clapboards with sheathing like a foam layer in between. However, it’s best to remove clapboard siding if you plan on replacing it with new siding. Burying wood clapboards underneath new siding can create risks of rot and mold, or hidden insect damage. It can also create warping issues over time. Removing clapboards allows you to properly install a new sheathing, as well as clean up the exterior wall and look for any signs of damage.

Board and batten siding refers to the look and style of the installation rather than the material itself. You can install board and batten siding whether you choose vinyl, wood, fiber cement, or metal as your material. Among other popular siding styles to consider are clapboard siding, stucco, shake siding, and log cabin siding. Stone, stone veneer, brick, and brick veneer are considered high-end alternatives that can help maximize ROI and curb appeal.

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.