For the highest possible r-value for your insulation, get rid of your insulation area.
Removing old insulations is normally completed by insulation contractors however, homeowners may be able to handle the work themselves. The basic idea behind removing blow-in insulation is cleaning the insulation from the room. This is a demanding vacuum as well as a broad the hose. A majority of people sweep the empty insulation directly into bags of garbage made specifically to store older insulation as well as to work with vacuum systems.
This video shows how a homeowner completed an insulation job prior to that he did independently. In order to complete the task at the lowest possible cost the homeowner made use of rentals of the equipment. Many homeowners will need remove old insulation once. He took a rental vacuum from a local service for rental of equipment and bought insulation bags from the Internet. It was then possible to eliminate all insulation and then air seal it. He hopes to see a decrease in the carbon footprint of his home and in cost of energy with the new insulation. zvy3ecpfco.