Almost all unfinished attics use Blown-in insulation these days instead of batts or rolls. Unlike regular insulation, the material is loose and does a better job than other options in most cases.
Blown-in insulation is a fast, affordable, energy-saving solution. However, before using this option it's essential to get the attic completely sealed so no air can flow through. The blown insulation won't work at its best if you're already letting air circulate through the material
The best way to keep air from circulating is to seal the gaps between your attic and the room below. The furnace blower takes bales of packed, dense fiberglass that are fed to a hopper which shreds and fluffs it like a pillow
So the installation guy uses a machine to spray insulation throughout the attic. He ensures even and complete coverage of your entire attic. If you live in a cold climate such as New England, the U.S Department of Energy recommends R-49 insulation at a minimum
A lot of houses aren't up to code. It's a good idea to have them inspected by a professional to make sure they're up-to-par. Some companies might also offer blown-in fiberglass installation, which can be done in 1 day or less.
One of the first benefits you will realize is significant cost savings. Apart from lowering your fuel and electricity bills, one-time installation reduces your operational expenditures by 40%. You can recoup all costs and start saving money on day one.