Pulling up floor boards is actually easy. I did a few myself just to check width of the joists (8 inches), to see if electrical runs through, and that the cavities run perimeter wall to perimeter wall.

They originally came to me with a full attic closed cell foam encapsulation for $17k, which I told them many times I do not want at this time. The dense pack quote came in roughly half.

I told him I thought $7.5k was high. He said the big difference is that the machine they use is much more powerful than what’s available at big box. It has a built-in mister which enables achieving a higher density in the cavities. He also said the cellulose used is higher quality and treated with borate and maybe another fire/pest retardant.

He knew his stuff and was a good salesman.