Improved Space is committed to delivering your project at the highest quality and fairest price possible. We work throughout New England and are experts at finished basements. State building code states R15 continuous or R19 non-Continuous is to be used. If your basement has a moisture barrier from a water proofing system then Improved Space would recommend unfaced fiberglass between the framing. If there is no moisture barrier in place, Improved Space recommends installing 3” which is R15, of Polystyrene foam board to create a moisture barrier and create a contained space which will provide a better insulated environment. Based on the type of foundation and budget, close cell foam spray would also be another way to insulate. Some of the old foundations made with field stone, cinderblock and old concrete, close cell foam spray is recommended to help with the moisture and critters.