In 1991, I built my 3000 Sq. foot home in North Central Pa. and absolutely love it. The basement never gets below about 60 degrees F even with the heat turned off in the middle of winter. No water infiltration,easy to run wires thru, and very solid. Absolutely no problems or issues. Before I bought the system I had my dad, cousin, brother check it out. They are all engineers. They said it was the best foundation system on the market. Almost 12 years later, I can say they were right. If you decide to buy,you won't regret it. Please tell them I told you about their quality product.I am being completely honest, its a great system.