[masraum]

Originally Posted by GH85Carrera

At my old house was post and beam, and each winter I blocked off all the vents for under the house. and insulated the pipes with the foam pieces. Most important, I let the water drip in all the sinks and the tub.

With only a few hours below freezing you will be fine if you block off all under house vents.

36 hours with temps dipping into the single digits. Fortunately the west and north sides are solid except for 1 vent on the west side that I'll be blocking. The south and east facing sides are all trellis which is going to make blocking them tough. I probably have some wood so I could block some of it.