Cured-in-Place Pipe (CIPP) solutions have been around for decades and have been proven to extend the lifecycle of underground sewer lines that are simply cost prohibitive to excavate and replace. As a lining solution, CIPP is appropriate for systems such as underground, larger diameter drain and sewer lines, where access costs are very expensive and there are fewer connections to be concerned about. CIPP linings are thicker, heavier, resin impregnated liners, such as felt or fiberglass, that cure to a hard, structural finish, essentially creating a pipe within a pipe.
However, for above ground CIPP solutions within the building envelope, there are numerous risks – including health and safety concerns, hazardous material considerations, installation concerns, as well as durability and warranty concerns.
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While there are certain underground applications for CIPP lining that clearly make sense, the amount of risk associated with CIPP lining within the building envelope has led the authors to conclude that CIPP is not a comparable alternative to pipe replacement of drain, waste and vent piping within the interior of a building. Before making an investment decision, it is always advisable for a property to explore all its options, including a repipe, to ensure their community is making the most informed decision possible about fixing its failing pipes.