Insulation only slows the time when it will freeze after the water is not running through the pipe.
How to run pex through attic.
Pex is semi flexible which allows for long continuous runs through joists and studs.
Secure the line to the joists using clamps image 2.
Pex type is forgiving when it freezes as far as breakage but insulating an exposed water line does little to keep it from freezing.
Pex c is the most economical choice with a 10 foot section running 1 75 to 3 50 depending on brand and diameter.
Such as at night if the attic temp is 15 deg f.
Be sure to leave extra pipe on both ends of the run.
I would re route it into the attic and down to each fixture.
Running pex in an attic.
When running pipe from a slab to an attic use cross linked polyethylene tubing or pex instead of copper.
For a variety of reasons from pipe damage under a slab to home design constraints water pipes may need to be run or rerouted through a home s attic.
It may give it an extra hour before it freezes solid.
Pull the lines up through the holes drilled in the sub floor image 1 and then run the other end to the area where the water will be coming into the home.
Because there are.
San antonio is a temperate climate and it rarely gets below freezing and i know pex is more resilient when is comes to freeze ups as the plastic tends to expand as needed.