Would a 15000 gallon 4 foot deep above ground pool freeze solid over the winter in SE Wisconsin if it is covered and has a 4X8 foot pillow in the center?

Answer 1

That is a great question. Because it is above ground you are going to be more likely to have a solid freeze on the water in the pool. Will it happen I don't know for sure, I do not have any experience with above ground pools in that part of the country? We are mid east coast. I will not say we have never had bad winters, but in 76' it never got above freezing for over 30 days. Now we had ice on lakes that was thick enough to ice skate on probably about 6" or more thick. I even ice skated on a salt water bay. Now that is cold! You are wise to put in the air pillow, that should help keep from cracking the wall. That should help protect you from cracking the wall of the pool. When you develop ice on the pool DO NOT UNDER ANY CIRCUMSTANCES WALK OR ICE SKATE ON THE POOL! If you do it will crack the liner and you will be buying a new pool liner. The ice will be frozen to the frozen pool liner.