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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.

The lifespan of siding ranges from 20 to over 100 years, depending heavily on the material, climate, quality of installation, and maintenance.

• Vinyl, Wood, and Aluminum: Typically last 20 to 40 years. Engineered wood may need replacement after just 20 years.

• Fiber Cement: Lasts around 50 years.

• Brick and Stone: These are the most durable, lasting for a century or more with proper care.

The longevity of any siding can be shortened if it's not properly maintained or if damage is not repaired promptly. Regular cleaning is vital. It's time for a replacement when you see widespread damage, signs of water intrusion, or a spike in energy costs.

You should consider a siding replacement material that meets your expectations for budget, durability, and if you want to complete the siding project yourself. Some materials are better than others in certain climates and easier to install for beginners. If you’re unsure which material suits your home, check with a local contractor for guidance.

Stucco is considered a type of cladding because it includes a built-in ventilation layer, a weatherproof membrane beneath that, and, often, a layer of insulation to improve building efficiency. The multiple layers of stucco—the scratch coat, the brown coat, and the finish coat—also create a more complex building membrane, so it’s more accurate to call it cladding. However, homeowners and contractors alike refer to stucco as siding.