How To Blow Cellulose Insulation Into Walls. They actually blow additional cellulose into the wall cavity with a fiberglass batt already in it to show you how much air space was still available. But how do you get insulation into existing walls without opening them up?
Because of the old shoddy 150 year old framing the cellulose wasn't able to get into nearly a third of.
You buy the insulation and rent the machine that blows it into the wall areas. They actually blow additional cellulose into the wall cavity with a fiberglass batt already in it to show you how much air space was still available. Cellulose insulation is the oldest form of home insulation. I'm skeptical that they'll be able to find and fill every cavity along the outside of the house.