Concealed conditions
Definition: Hidden problems discovered during renovation when walls, floors, ceilings, or other building assemblies are opened. Common examples include structural rot, termite damage, mold, moisture intrusion, undersized framing, outdated or unsafe wiring, non-code-compliant plumbing, and the presence of hazardous materials such as asbestos or lead paint. Discovery of concealed conditions is the signature risk of renovation work and frequently triggers unbudgeted repairs, schedule delays, and change orders — with cost impacts ranging from under 5% to over 100% of the original budget depending on severity.