Greetings. I am a homeowner in southeastern New York State. My geothermal contractor wants to install my vertical closed-loop system during the winter.

Should I be concerned about the ambient temperature during installation? For example, is there a temp below which the piping becomes too brittle or the grout won't set properly -- or other problems arise?

Many thanks for any help.

If they are willing to work, the weather will not effect the performance of either the grout or the pipe. It may effect the performance of the crew. lol I tell my guys when it gets cold that " the beatings will continue untill morale improves"
Eric

We continue working all winter long, mainly horizontal in Upstate, NY. The loop performance is not 100% as the ground needs time to settle around the piping and backfilling frozen topsoil doesn;t help much when trying to fill voids directly around the piping....but we do about one per week in the winter and it works fine..

We are drilling in Utah right now. Temps in the low 30's

We are trying to get the loops in at warmer weather, more for comfort and productivity. But if we have to, we do it all winter long. Yes, lesser settling until spring, and less performance because the ground does not compact as well around the loop, but no negative impact longterm.

If my guys don't get these pond loops in soon, they'll be able to walk them out to the middle of the lake!