Spoke to the owner, and he was fine- Professional and gave me a good feeling about the work to be done. They had been recommended by TVA. The crew showed up to do the work, the owner was on another job. The weather stripping on one vent was coming off the next morning and I had to call them back to replace it (which they promptly did) and it has not been a problem since. They had to take an outside vent off the house to get insulation in the attic. The owner told me that they would use screws to put it back up so that it could easily be taken off again if we needed to access the attic again. Apparently they did not have a ladder because when I came home to check on the job, one of the crew was standing on my wooden ice chest to get to the cover, and when he put the vent back up, he used a hammer and nails and was hitting the actual vent, putting dents into it. I am not able to inspect anything else that they did because it is all behind walls and under the foundation, but the cursory inspection by TVA passed the work. My utility bills have been lower since this work was done.