<h1>Manufacturer faces legal risks over celebrity-backed cladding ads: substantiation, endorsement rules (Section 5; 16 CFR Part 255)</h1> A building-materials manufacturer launched a nationwide advertising campaign featuring a celebrity endorsement to promote premium exterior cladding, asserting aesthetic appeal, durability and broad applicability to homeowners and professionals. Legal considerations include truth-in-advertising and substantiation of performance and safety claims (e.g., fire retardancy, durability), compliance with endorsement and influencer disclosure rules, intellectual property rights in creative content, and regulatory approvals or labelling for building materials. The campaign's cross-media rollout and press distribution raise potential contract, publicity-rights and consumer-protection scrutiny if claims prove misleading or unverified.