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Basics & Theory

BRIK: History of Bio-Fiber Batts & Boards
Building Research Information Knowledgebase paper Innovative Materials, Bio-Fiber Batts and Boards provides a short review of historic development from macerated paper introduced in 1919 as a commercial insulation product in Canadian Prairies through to the 2009 American production of cellulose fiber batts and blankets and European flexible and rigid wood-fiber thermal insulation boards. (PDF)

CIMA: Dry Blown-In Cellulose Insulation
Cellulose Insulation Manufacturers Association describes two types of dry blown-in cellulose insulation, loose-fill for open attics and dense pack for enclosed framed cavities.

CIMA: Sprayed Moisture-Added Cellulose Insulation For Tightly Sealed Wall
Cellulose Insulation Manufacturers Association describes how sprayed moisture-added cellulose insulation is blown from the applicator hose, with a small amount of water is added to activate the natural starches or adhesives in the cellulose so it adheres to the surfaces within the wall cavities.

CMHC: Drying And Air Barrier Effectiveness OF Wet-Sprayed Cellulose Insulation
CMHC study summarizes wet-sprayed cellulose drying rates, moisture damage potential, and air-barrier effectiveness. (PDF)

Fine Homebuilding: Buyer's Guide To Blown-In Insulation
Fine Homebuilding describes features and benefits of loose-fill and blown-in fiberglass and cellulose insulation materials.
Industry Sectors

CIMA: Cellulose Insulation Manufacturers Association
The Cellulose Insulation Manufacturers Association is the trade association for the cellulose segment of the thermal/acoustical insulation industry.
Information Sources

CIMA: Technical Information On Cellulose Insulation
US Cellulose Insulation Manufacturers Association provides facts on cellulose benefits and issues, technical bulletins, special reports, video clips.
Issues & Performance

Building Science: Airflow Resistance Of Densepack Insulation
Building Science research shows dense-packed cellulose insulation, installed to densities of 3.5 pcf and higher, was shown to provide a significant resistance to airflow. (PDF)

CCHRC: Cellulose Insulation Moisture Performance in Cold Climate
Alaska Cold Climate Housing Research Center study Cellulose Insulation Moisture Performance in Cold Climate Construction may indicate that using cellulose insulation in the stud cavity instead of fiberglass batts can slightly improve moisture control. (PDF)

CIMA: Fire Burn Test For Cellulose & Fiberglass Insulation
Cellulose Insulation Manufacturers Association provides test results that show superior flame and smoke spread control of sprayed cellulose insulation and blown fiberglass insulation in building wall cavities.

CIMA: Greenest Of Green Weblog On Cellulose Insulation
Cellulose Insulation Manufacturers Association weblog offers information and resources on green building and sustainability benefits of cellulose insulation.

Healthy House Institute: Possible Health Issues With Cellulose Insulation
Healthy House Institute says cllulose insulation has been considered to be a very safe product to use in houses, but it can sometimes be responsible for problems.

JLC: Walking On Attic Cellulose
Journal of Light Construction says because cellulose tends to spring back after being stepped on, the effect of a few footprints on the overall R-value is minimal, as long as you fill in the places where cellulose has been cleared away to provide access to the ceiling.

NTP: Tests Of Cellulose Insulation Show Minimal Toxicity
US National Toxicology Program studies indicated that few respirable particles or fibers are generated during the aerosolization of cellulose insulation and that even at very high doses of respirable particles, acute pulmonary toxicity is minimal. (PDF)

Building Science: Dense Pack Walls But Not Ceilings
Building Science says dense packing walls typically results in remarkable performance, but dense packing of unvented cathedral ceilings or unvented flat roofs is a problem.

CIMA: Cellulose Insulation And Vapor/Air Barriers
Cellulose Insulation Manufacturers Association says air/vapor barriers are not needed in most cases when cellulose insulation is used in the walls of homes.

CIMA: Installation of Cellulose Insulation In Attics
Cellulose Insulation Manufacturers Association guideline presents application practices for installation of stabilized cellulose insulation in open or closed attic spaces. (PDF)

CIMA: Standard Practice For Installing Cellulose Insulation
Cellulose Insulation Contractors Association Cellulose guide covers typical assembly designs installation methods that can be used to insulate new and existing residential structures in attics, walls, ceilings, and other building assemblies. (PDF)

Dr Energy Saver: Insulating Walls with Dense Packed Cellulose
Dr Energy Saver online video shows how to insulate walls with dense packed cellulose.

Ecohome: All About Dense Packed Cellulose Insulation
Ecohome describes issues and considerations for selecting and installing dense packed (or dense-blown) cellulose wall insulation.

Fine Homebuilding: Installing Dense-Packed Cellulose Insulation In Walls
Fine Homebuilding online video features two insulation company representatives sharing their tips for installing dense-packed cellulose in wall cavities.

GBA: Blown Cellulose Insulation Job Goes Off Track
Green Building Advisor describes how too much cellulose in the wrong place creates a winter nightmare.

GBA: Borrowing A Cellulose Blower From A Big Box Store
Green Building Advisor says if all you want to do is blow cellulose on your attic floor, all you really need is one of those blowing machines that are available at building supply stores.

GBA: How To Install Cellulose Insulation
Green Building Advisor provides detailed instructions for blowing loose-fill cellulose on attic floors and dense-packing walls.

GBA: Insulating a Double-Stud Wall With Cellulose
Green Building Advisor says the double-stud wall assembly looks like the best value, but questions remain about how to get all that cellulose insulation blown in.

HIRL: Installation of Common Insulation Types
Home Innovation Research Labs online tech note Installation of Common Insulation Types: Wood-Frame Walls and Attics, provides practical information for the installation of three types of insulation in various applications: fiberglass, cellulose, and spray polyurethane foam. (PDF)

JLC: Getting A Fair Shake With Blown-in Cellulose
Journal of Light Construction describes a foolproof way to make sure you've got enough blown-in insulation by marking the trusses. (PDF) Free Registration Required

JLC: Reusing Existing Loose-Fill Cellulose Insulation
Journal of Light Construction online Q & A says there's no problem with vacuuming up and reusing existing cellulose insulation, as long as it's not mixed with lumber scraps, old plaster, or other debris.

US DOE: Blown Insulation for Cavities of Existing Exterior Walls
Building America Solution Center describes issues and considerations for installing blown insulation into exterior wall cavities of existing homes with minimal disruption to occupants.

WX TV: Dense Packing Walls From Interior
WX TV online video show how to dense-packing walls with cellulose from the interior of an old home.
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