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PEX in the attic

I live in Northern Illinois and during the winter we routinely sees temps well below freezing. I am going to do a small bathroom remodel and I want to install a rain-can shower head dropping down from the ceiling in the shower not on an arm extending from a wall, to facilitate this I was thinking of coming from my divert-er valve with PEX up to the attic wrapped in tan insulation and then a "shed" like structure built out of 2" rigid foam used to encase the run then all of that covered with the existing cellulose. My question being 1 is this sufficient to prevent any freezing and 2 any other suggestions or experience with this type of installation.


Re: PEX in the attic

No experience with such cold and plumbing, but it seems you'd be OK. Just have the PEX as close to the ceiling as possible with no insulation in between, then make the 'tent' and insulate over that. I'd think this would be enough heat in the piping area to prevent freezing. Also make it a straight run with no fittings; freezing won't hurt PEX but can damage some types of fittings.


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