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Yes, you can install siding over stucco, but it's crucial to ensure the stucco is in good condition first. Before proceeding, inspect the stucco for any signs of damage, leaks, or mold growth. If you discover water damage, mold, or have ongoing leak issues, it's recommended to remove the stucco completely. This step prevents future problems like mold and pest infestations and allows a professional to repair or replace any damaged sheathing underneath. If the stucco is sound, the installation process involves attaching furring strips to the wall's framing directly through the stucco. The new siding is then installed onto these furring strips. A professional may also need to adjust window and door openings to prevent them from being recessed behind the new siding, which can cause aesthetic issues and create potential leak points.

Not wrapping a house before installing siding can lead to moisture intrusion, rot, mold, and even higher energy bills. Older houses may have siding installed without wrap underneath, so it’s a good idea to add a wrap layer when it comes time to replace old siding to prevent potential damage from water intrusion—local codes may even require it, so check with your municipal building authority. 

You cannot install clapboard siding on a bare, unprepared surface. Clapboard siding requires a clean, sturdy base made from plywood or similar materials, sometimes called backerboard. Then, it needs an underlayment or sheathing, a moisture membrane to help protect the exterior wall.

Note that sometimes clapboard siding is caulked as it’s installed for additional protection. We don’t suggest this: Caulking the siding can trap moisture inside the clapboards and lead to moisture damage over time. The siding needs some space to “breathe,” especially in rainy weather.

While almost nothing is completely fireproof, metal siding is extremely fire-resistant. It’s non-combustible so while it may eventually melt in extreme temperatures, it won’t actually light on fire itself. This can add a layer of safety to structures that wood or vinyl siding can’t, making it attractive for industrial use. Metal siding can significantly slow down the spread of a fire, giving extinguishers and firefighters a much better chance at saving the structure and containing the blaze.