The wrens are sensitive to cold weather; we have a few bush piles out in our field for the birds to use, to hide in or to use as a place to sleep. They will also use bird houses for sheltered.
There are other places that they may use to roost at night; the eaves on the front or back porches. They will also look for natural places to roost; tree stumps, or tree cavities, etc. They may roost in garages, barns, or old bird nests.