We met with the contractor this afternoon that will build the new house to drop off house plans and he said the going thing is spray foam insulation. Floor to roof deal. He said most if not all the homes he has built in the past few years has had it put in. Really cuts down on the utility bill's for both heat and air. A bit more expensive than fiberglass but worth every penny. We are looking at near a year out on building he is that covered up with new home construction , but he is worth the wait to us. Never met a more honest contractor. Ours will be a small project for him at 1,400 sq ft heated and he wants to get back into building smaller houses as most he has built since he did this one we are in now is in the 8,000 to 12,000 ft range. Also he likes the tankless waterheaters so if anyone has one of them how do you like it. And is yours gas or electric.