Understand typical below-grade waterproofing warranty structures and what to check before relying on one

Steps

1. Distinguish the two warranties typically in play: a manufacturer's material warranty (covers the product itself) and a contractor/applicator's workmanship warranty (covers installation labor) — these commonly have different terms, obligated parties, and claim processes, so get both in writing rather than assuming one covers the other.
2. Ask whether a manufacturer offers a "no dollar limit" (NDL) or full-system warranty, which typically requires the manufacturer to inspect and approve the complete installed system (including specified compatible accessory products) before issuing it — confirm what's actually being quoted versus a basic material-only warranty.
3. Request the specific written exclusion list before signing: common exclusions include non-approved compatible products at interfaces, damage from other trades after installation, and deviation from the manufacturer's published details.
4. Confirm the claims/remedy process: what triggers a claim, whether repair vs. full replacement is offered, and whether the warranty transfers to a subsequent building owner — relevant especially for developer-to-owner or resale transactions.
5. Request the actual warranty certificate language for the specific project rather than relying on a verbal or brochure-stated term, since terms vary by product tier, project type, and whether the installer is a manufacturer-certified applicator.