Cellulose insulation is made from recycled wood fibre, primarily newspaper. One hundred kilos of cellulose insulation contains 80 to 85 kilos of recycled newsprint. Waste disposal is a major problem for cities. Cellulose unquestionably meets all requirements for insulation specified by the guideline.

Cellulose maintains its U-value with humidity levels of up to 40%, other fibrous insulations lose their insulating effect substantially when humidity levels rise over 10%. Cellulose keeps your roof timbers healthy and dry giving them a long life. Cellulose insulation is subject to strict flammability and corrosiveness standards established by the Consumer Products Safety Commission.

Cellulose insulates better. It not only offers more heat transfer resistance per m than other fibre insulation materials, it also seals the home against air infiltration better than other fibre insulations. ...Cellulose insulation production recycles a waste product that presents communities with a serious disposal problem ...Cellulose insulation saves more energy when the energy required to make the material -- "embodied energy" -- is figured into total energy savings. ...Cellulose insulation makes homes safer by slowing the spread of fire. ...Cellulose insulation makes efficient use of natural resources.

When Cellulose is installed at a density of 60kgs or more it gives a Decrement Delay of 11 hours, substantillly slowing down heatloss, even more than the U-value suggests.

Comparing Cellulose Insulation with Rockwool. Left below, a hair dryer blows air into the box. The left compartment is filled with Cellulose, and the right compartment is filled with Rockwool.

On the right side the air blows through the Rockwool and lifts up the tennis ball up to the top of the tube, the ball over the Cellulose stays down. One clear message from the experiment: When you use Cellulose you get a better blower-door test.

Passive House wall in Sweden insulated with Cellulose.