We have lived in our house for almost four years. Last winter we had about a week of sub freezing temperatures (not super common for Oklahoma City). Unbeknownst to us the pipe section of a hose spigot burst and we didn't find out until the next Spring (only leaked when the spigot was turned on). There was a small (2 inches) where the pipe was not wrapped in foam right before the spigot and inside that corner.
This is on a corner of our garage, both walls are exterior.
I just had a plumber replace the spigot and he said some fiberglass insulation between the pipe and the exterior wall and a spigot cover should prevent it from happening again. Will that work? I feel like any type of fiberglass insulation wouldn't help because both sides of the wall are not climate controlled. My original plan was to fill the corner with spray foam and make sure the rest of the pipe is properly wrapped with foam. But I'm not sure if that will be sufficient.