According to AI, the cost for blanket ceiling insulation is $0.50 to $1.50 per SF vs foam on the rafters at $3 to $7 per SF. Also, the foam requires more square footage because the roof is sloped and you need to insulate the entire roof, whereas with ceiling insulation, you can omit the garage and lanai ceilings. No wonder the builder doesn't install it.

Right. They love to cheap out and cut corners.

I have inspected a lot of houses in different states, and I have never seen foam insulation applied to the roof rafters. It is definitely not a standard way to insulate a house.

Well, spray foam is a very standard way to insulate, should be the gold standard if you ask me. If that's what you are referring to. I assumed you meant spraying to sheeting instead of adding baffles.

To be honest I'm not sure if it's a newer standard or what (direct to sheeting on roof). All the houses I've had done we installed baffles for airflow. But the last garage I did with a mother-in-law suite above it they sprayed directly to the sheeting. And It's the same guy I've used for the last 15 years.

Now this is MN I'm talking about. All closed cell foam and a different climate.

I was just referring to your comment that the builder is cheaping out and cutting corners. With respect to attic insulation, the builder is just following the normal and accepted method to insulate a house in accordance with the building code. It is not fair to say that the builder is cutting corners on the insulation.

Oh the cheaping out comment. Yeah that's the builder buying the cheapest POS everything the can find (cabinets, fixtures, outlets, etc). My advice to anyone who is building a new house here. do base everything and upgrade after the fact with quality items. So them not using foam would fit into that mindset. But it's not even an option for us to upgrade to in the build process.

The warranty people in The Villages hate me, I'm sure of it.

This thread is about attic insulation. The builder is insulating attics the same way that millions of houses have been insulated for the past 40 years or longer. They are not cheaping out on attic insulation.

Just cause grandpa did it that way doesn't mean it's the best way.

I sure would like to know if resale is an issue or homeowners insurance had an issue (fire or shingle life issue) with foam. I have a large walkable attic (builder put in a walkway a couple of feet above the ceiling joist). I would love to create some storage space and the resale for several hundred square feet of storage would be a positive. Add some nice stairs and that automatic lift platform.....I might never leave....well upright anyway.

Need to find somebody down here that has foam already sprayed.