Greenfiber is a leading manufacturer of cellulose insulation in the US and Canada, providing energy-efficient and cost-effective insulation for every project.

With Greenfiber insulation, we can change the way people live, sleep, relax and feel. Traditionally, insulation was considered a necessary filler, a commodity to be installed in walls and ceilings to regulate temperatures, help save energy and money, and buffer against the outside world.

Greenfiber cellulose insulation outperforms other types of insulation. It offers advantages in energy savings, noise absorption, and increased fire resistance.

With Greenfiber blown-in cellulose insulation, you'll be more comfortable and save money. Plus, you'll get added fire resistance and noise protection.

Use our zip code tool to find local retailers selling Greenfiber cellulose insulation bags and products near you.

Greenfiber has the industry’s leading cellulose insulation products, including dry blown-in insulation, all borate-treated formula, and specialty formulas.

Learn how to install cellulose over existing fiberglass insulation. “More and more, customers are striving for experiences. We feel that, through the use of superior building materials and the appropriate practices, we can create sanctuaries at home, allowing people to tune out the noise that they live with on a daily basis and spend more ...

Sanctuary® insulation brings more peace, quiet and comfort to a house while supporting the health and well-being of those who call it home.

Our blow-in insulation calculator can help take the guesswork out of scoping and pricing for your next cellulose insulation project. Why is blow-in cellulose insulation the best choice? Cellulose blow-in insulation is one of the best choices you can make for your home.

NEW SANCTUARY® DEFENSE Blow-In or Spray-Applied Insulation. An eco-friendly, high-performance insulation that delivers everything SANCTUARY® does, but with added protection against 25 home-destroying pests.