Basement Waterproofing Warranties: Reading the Fine Print
Lifetime transferable warranties and the conditions that void them.
Basement waterproofing companies advertise lifetime transferable warranties as a major selling point. They can be valuable — but only if you understand the exclusions, the maintenance requirements, and what 'transferable' actually means in your contract.
Common exclusions to look for
Almost every warranty excludes: hydrostatic pressure beyond what the system was sized for, sewer backups, plumbing leaks, condensation, water entering above the waterproofed area (window wells, walkout doors), and any 'act of God' the contractor can argue.
Warranties also commonly void if the homeowner installs a finished basement against the waterproofed wall, modifies the sump pump system, or fails to maintain annual service.
Transferability gotchas
'Transferable' often means one-time transfer to a single subsequent owner, with a fee ($150–$500) and an inspection requirement. Some require notification within 30 days of sale or the warranty voids.
When buying a home with an existing waterproofing warranty, contact the company directly before closing to confirm the warranty is in good standing and that transfer is approved. A warranty that won't transfer is worth zero at resale.