Most people call us because the room over the garage runs hot, the upstairs never cools off at night, or the power bill keeps creeping up. Those usually point to an attic that's thin, settled or uneven, and blowing in more is often one of the simpler fixes that makes a real difference. I still need to look first, because the cause isn't always the insulation.
The price mostly comes down to how big the attic floor is, how many inches are already up there, how easy the attic is to reach and how much sealing and prep it needs before we blow anything. The schedule turns on that prep too, since a roof leak or a vent that needs another trade comes first. Your written estimate gives your price and lists anything that has to be fixed before we start.