You can add dense pack cellulose insulation pretty easily to an uninsulated house. Home depot rents the machines to do it. Use a hole saw at the top of the dryw

You can add dense pack cellulose insulation pretty easily to an uninsulated house. Home depot rents the machines to do it. Use a hole saw at the top of the drywall, shove in the blower tube and fill the cavity up with low cost cellulose.