PEX Pipe Latest Cellulose Insulation Myth

Fiber Lite cellulose insulation spray installed in exterior wallMyths have been perpetuated about cellulose insulation for years. While most of this misinformation has centered around fire, moisture and settling topics, a new category has emerged recently: PEX.

PEX (polyethylene pipe) is commonly used in commercial and residential plumbing projects because it is flexible, durable, and resistant to chemicals. It has become a standard go-to material for water pipe systems and is affordable and relatively easy to install.

Somewhere along the way misinformation emerged siting issues when PEX comes into contact with cellulose insulation in walls and attics. Evidently the concerns raised are linked to the fire retardant included in all cellulose insulation. Nothing could be further from the truth. PEX is in fact resistant to chemicals and the fire retardant chemical used in cellulose insulation also does not cause chemical damage to pipes made from polyethylene, PVC or copper.

Like all water pipes, PEX should to be insulated in colder climates where the water can freeze and cause ruptures and leaks. Cellulose insulation is in fact a perfect match with PEX piping and can be blown over PEX in attics (very common in older homes where original slab pipe fails and must be re-plumbed in the attic) and around pipes in the walls (see photo above of wall and pipes sealed with FTI cellulose insulation) to provide excellent insulation for the plumbing system as well as the overall home.

Want more information about PEX or any other common misconceptions for cellulose insulation, contact FTI for the facts.

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