What it is, how it works, and the questions to ask before you hire.
Last updated: October 2026
Full siding replacement is the reset: old material off, wall assembly inspected and repaired, new drainage plane and flashing, then new siding. It is the right spend when material has failed across walls — and the one project where what happens behind the siding matters as much as the siding itself. This guide covers how replacement works, how to choose a material for your climate, and the questions that separate a thorough job from a cosmetic one. For the water-damage side of walls that have already failed, see our sister guide at waterdamageprices.com.
Going over existing siding is sometimes done, but it carries real compromises: it buries whatever condition the wall is in, adds thickness that complicates trim and openings, and can void the new material's installation requirements. Removal costs more and is the only way to inspect and repair the wall assembly and install a fresh drainage plane. For a home you plan to keep, removal is usually the defensible choice — ask any contractor proposing an overlay to explain how they will handle flashing and wall condition blind.
Service life depends more on installation and climate than on the label. Fiber cement and steel have the strongest durability records when detailed correctly; vinyl asks the least maintenance; engineered wood performs well when its edges stay sealed; wood lasts generations where it is maintained — and fails fastest where it is not. Choose for your weather and your willingness to maintain, and spend the difference on installation quality.
In writing: the material and profile, removal and disposal of the old siding, wall repairs found on opening (and how surprises are handled in the sequence), house wrap and flashing details, trim and corner treatment, and how windows and doors are handled. A one-line proposal for a whole-house job is a warning sign by itself.