How to Install Insulation: The Expert Energy Show - buildaroo.com

Terry shows us the dense pack cellulose fibers, derived from newspaper and mixed with boron, that are being used in the wall cavities of the demonstration model, and as the name implies, the cellulose is densely packed into 3.5 pounds per cubic foot. The reason they are packed so tightly is because cellulose is known for settling; as a result, the very top of the wall cavities are left with an open air space which substantially decreases the effectiveness of insulation in a home.

Whats good about blown-in cellulose is that it completely fills in wall cavities and surrounds piping or wiring that are in the respective space. With traditional fiberglass insulation, it is hard for installers to cut the fiberglass to fit exactly in the right spaces; however, there is also blown-in fiberglass insulation which makes it just as easy as cellulose. Cellulose has an R value of 3.2 per inch which is very high, and it blocks sound.

Category:

Science & Technology

Tags:

• Insulation
• install
• installation
• building
• green building
• energy efficient

[shyboy2112]

How much does this cost per m^2?

[Johnnybluejohn]

densepacking cellulose rather than blown fiber can also air seal while insulating. I Have densepacked floored attics that leaked at 75% according to my blowerdoor and brought them down to 0% leakage. without even pulling up a floorboard.