Flooded cable isn't all about the PVC cover (or jacket). Burial cable has a self-healing adhesive sealant between the jacket and encasing the braid to prevent water/moisture infiltration if the jacket is nicked or pierced. If you live in a more arid location, this is not much of an issue unless varmints nibble... Once the jacket is compromised, regular coax cable can wick moisture/water in the braided shield.
Slightly different, but related subject: Coax cable can become a small pipe once water gets inside. On runs with a vertical drop, I have observed water dripping out of a f-fitting. On the test bench we have seen several STBs damaged by water entering through the tuner f-fitting. Several times I have been thankful that the installer installed a ground block to effectively dam the water flow from reaching the equipment.
Slightly different, but related subject: Coax cable can become a small pipe once water gets inside. On runs with a vertical drop, I have observed water dripping out of a f-fitting. On the test bench we have seen several STBs damaged by water entering through the tuner f-fitting. Several times I have been thankful that the installer installed a ground block to effectively dam the water flow from reaching the equipment.