re: Wrap Pipes?

in order for dripping the pipes to work, you need to make sure every branch line is running. so even a hose bib outside needs to run or it will freeze.

on a raised house, your pipes under the house should already be insulated. if not they need to be.

insulation on buys you time as it slows the heat transfer process. a long prolonged cold snap will still freeze insulated pipes.

I remember my dad under the house Christmas eve in the early 80's trying to thaw out the pipes in our house in the garden district in BR...... we had 3 straight days where it didnt get above freezing.