Cellulose insulation is a renewable material made from plant fiber; mainly wood, but can also be made from cotton, straw, sawdust, hemp, and corncob.

Modern cellulose insulation is made from recycled newspaper by grinding it, removing any dust, and treating it with a fire retardant.

It is actually one of the oldest types of insulation, but has become exceedingly popular in recent years due to several studies that have found it to be much safer in a fire situation and superior in R value to other types of insulation on the market.

It is used in roughly 10 - 15 %  of North American homes

Cellulose insulation is made from recycled material

Decreases CO2 released  into the atmosphere

It is safer than Fiberglass due to its manufacturing

It has much less embodied energy than fiberglass or polyurethane

Cellulose can be used in retrofits to enhance existing insulation with minimal cost

It can be made locally, and recycled locally

It is actually a really good thermal insulator (extremely high R value).