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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.

Whether or not your homeowners insurance covers EIFS stucco siding depends on the insurance company and the specifics of the policy. Some insurance companies will not cover EIFS due to its susceptibility to moisture damage, and some companies will only cover EIFS manufactured and installed after a certain date, since newer systems mitigate potential damage concerns better than older ones.

You should use a siding nail gun for siding installation, but if you don’t have one you can use a framing nailer instead, if the nails are long enough to firmly attach to the clapboard siding. However, framing requires longer nails that join lumber together. In that instance, siding nails will not be enough.

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.