A wall covering is a finish applied to a wall, such as wallpaper, fabric or a sheet product. Its backing and adhesive are part of the assembly.
What this means at your property
After a leak, the visible face may conceal moisture or damage beneath the finish. A covering can also affect access and drying. Matching a replacement involves the material and installation, not only its pattern.
What should be agreed before removal?
Ask which areas need assessment, how adjoining finishes will be protected and whether substrate repair is included. Keep product records or a sample where appropriate, and clarify whether a local patch can meet the agreed appearance expectations.