Reach Us
Cellulose Insulation Manufacturers Association

Latest News from CIMA

News & Information

Should I Add Insulation In Older Home Exterior Walls

Cellulose Answer Man: Your Source For Information Cody asks: I have an inquiry regarding dense-pack cellulose for exterior sidewalls of an older home that I’m hoping to get some insight on. I live in upstate New York (Zone 6) in ... Read More →

Why Cellulose Insulation Fits Well With Earth Day

Cellulose Insulation Makes Sense Earth Day & Every Day With fears of global warming and climate change fast approaching a tipping point, the intent of Earth Day has never been more relevant. Conceived in 1969 at a UNESCO conference held ... Read More →

Made In USA – It’s Harder Than It Sounds

Made in America is much harder to do that to say. The advent of globalization has clouded the “Made in the USA” tag for much of the manufacturing in the nation. Cellulose Insulation Manufacturers Association producer member companies and their ... Read More →

Causes of Damp Cellulose Insulation In Attic

Cellulose Answer Man: Your Source For Information John  S asks: I’ve never gone up in my attic right in the spring before and this year I did to install some new lighting. I am noticing that my cellulose insulation feels ... Read More →

Proper Ventilation For Home Attics

Cellulose Answer Man: Your Source For Information Ray asks: When my house was built in 1978, blown in insulation was used. Out at the end of the roof rafters where it meets the soffit, a 10 inch piece of faced ... Read More →

Inaccurate Cellulose Insulation Information Persists Online

Misinformation On Moisture And Cellulose Insulation A quick scan online of recent articles listing the pros and cons of cellulose insulation show how pervasive inaccurate myths persist about one of the most popular types of building insulation. Cellulose insulation is ... Read More →

Sound Dampening With Insulation Between Floors Explained

Cellulose Answer Man: Your Source For Information Kelvin D asks: In order to achieve the best sound dampen through installation of cellulose between my basement and first floor, should I dense pack the material to the tune of 3.5 lb/ft^3. ... Read More →

Cellulose Insulation Adhesive Properties Explained

Cellulose Answer Man: Your Source For Information Jason A asks: I have a question about the adhesive properties of wet spray cellulose insulation. Specifically, does wet spray cellulose insulation permanently self-adhere to the substrate? And can wet spray cellulose insulation ... Read More →

CIMA Salutes National Recycle Day 2021

Cellulose Insulation Perfect Fit For National Recycle Day Cellulose Insulation is the leader in recycled building products and the perfect fit for participating in National Recycling Day…and every day! No other building insulation (or just about any other building product) ... Read More →

Retrofit Cellulose Insulation In Walls Of Older Homes

Cellulose Answer Man: Your Source For Information Timmy asks: I am a building maintenance teacher in southern WV. My students are going to exit my class in an area of a lot of old homes that do not currently have ... Read More →

Firefighters Guide For Cellulose Insulation Building Fires

How To Handle Fires In Buildings With Cellulose Insulation Cellulose insulation is an easily misunderstood building material. It is made from paper fibers, so it is an organic material. Left untreated, organic materials are combustible. Some other common insulation materials ... Read More →

Cellulose Insulation Ecologo Info

Cellulose Answer Man: Your Source For Information Joey asks: I have a customer looking for Ecologo certification for Cellulose insulation. Can you please provide me with either testing or a certificate? Answer: ECOLOGO is an Underwriters Laboratories program documenting the ... Read More →

Schedule Cellulose Insulation Professional Presentation

Cellulose Answer Man: Your Source For Information Nick asks: Hi, I am looking to set up some kind of learning opportunity for my firm to learn more about dense-packed cellulose best practices. We do a lot of commercial projects and ... Read More →

How To Update Insulation In Walls Of Old Homes

Homeowners Often Forget Walls When Updating Insulation Updating the insulation in older homes is critical to making living spaces more comfortable and monthly energy bills more manageable. Unfortunately, most homeowners only think as far as the attic forgetting to consider ... Read More →

Adding Cellulose Over Old Garage Ceiling Batts

Cellulose Answer Man: Your Source For Information Julie asks: Hi, I just want to ask if it is possible to dense pack blown in cellulose into a garage ceiling which already has existing 60 year old batt insulation. I have ... Read More →

More Cellulose Insulation Fire Control Stories

More Examples of Cellulose Insulation Controlling Fire Spread In Homes We continue to monitor the news for reports of home and building fires where cellulose insulation is in use. A couple stories recently offer yet more good examples of how ... Read More →

Adding Blown Insulation Over Existing Attic Batts

Cellulose Answer Man: Your Source For Information Jennifer asks: Can I install cellulose blown in insulation over batt insulation with tears in the vapor barrier? I was air sealing my attic and had to tear the vapor insulation to reach ... Read More →

Dense Pack Or Wet Spray Cellulose vs. Flash-Fill Insulated Walls

Cellulose Answer Man: Your Source For Information Cheryl asks: Hello, I’m building a new house and I’m trying to decide between dense pack and wet spray cellulose in my 2×6 walls. I’m also trying to decide weather to use closed ... Read More →

Vapor Retardant vs. Vapor Barrier In Insulated Walls

Cellulose Answer Man: Your Source For Information Troy asks: I’m going to install Applegate cellulose insulation in the exterior walls and attic of my new house. I live in Central Nebraska. Do I need a vapor retarder like Membrain with ... Read More →

Cellulose Insulation Helps Control Fire In Condos

Cellulose Insulation Slowed Canada Condominium Fire Fires in any dwelling can be dangerous to occupants and lead to extensive damage and even total property loss. In condominiums and other types of attached dwellings the spread of fire to adjacent units ... Read More →

How To Calculate R-Value Of Settled Cellulose Attic Insulation

Cellulose Answer Man: Your Source For Information Sam asks: Are calculations of thickness for the depth just after installation or after it has settled for 3-4 years as mine has. Original depth was 16 inches, now it is about 12 ... Read More →

How Cellulose Insulation Performs In House Fires

Cellulose Insulation Protects Homeowners During House Fires Among the many benefits of cellulose insulation, beyond its core insulating properties, is the extra fire safety it provides to homeowners. In many cases home fires start as silent events, often in the ... Read More →

Practical Zero-Carbon Development From Canada

An article out this week from Canada provides an excellent example of how to design a zero-carbon footprint building. It aligns well with the “carbon-sink” concept first mentioned here on the Greenest Insulation Blog in 2010 and with the new ... Read More →

AIA Blueprint For Better: Design To Change Climate Change

It’s encouraging to see the American Institute of Architects (AIA) launching their BLUEPRINT FOR BETTER initiative with the goal of reducing “climate change and inequities in the built environment.” That’s a fancy way of saying improve design in the construction ... Read More →

Cellulose Insulation Meets Many of 10 Best Ways to Go Green

Recent Article Lists 10 Best Ways to Go Green in Home Build or Remodel Geoff Spitzer’s article in the New Hampshire Business Review caught the eye of the Greenest Insulation Blog. This insightful piece offers an excellent list of items ... Read More →

Think Insulation When Thinking About Cold Winter Weather

News Article Attests To Insulation Upgrade Savings The first sign of coming colder weather typically leads many homeowners to start thinking (once again in most cases) of upgrading their home insulation. There are many examples online of how much savings ... Read More →

Cellulose Insulation In Attics With Foam Under Roof Sheathing

Cellulose Answer Man: Your Source For Information Justin asks: My home currently has spray foam insulation on all outer walls. (including under my roof in the attic.) I wanted to add blown in cellulose in the attic for more soundproofing ... Read More →

Cellulose Insulation In Attics Pose No Ceiling Weight Issues

Cellulose Answer Man: Your Source For Information Paul C. posed an interesting question: I am a contractor working with cellulose to put into ceilings for builders in Australia. We have currently been questioned on the issue of the weight limitations ... Read More →

Cellulose Insulation Slows Home Fires

Cellulose Insulation Slow House Fire Spread By Design One the most misunderstood characteristic of cellulose insulation is it’s ability to slow the spread of flames in home and building fires. Cellulose Insulation is treated with boric acid and designed specifically ... Read More →

Cellulose Insulation Does Not Attract Insects

Cellulose Answer Man: Your Source For Information Glenda. asked: I was told by a termite that the cellulose insulation on the concrete walls under my house attracted termites. Is that true? (Should have said termite company. I do not really ... Read More →

Why Did CIMA Not Include Wallboard In Fire Tests

Cellulose Answer Man: Your Source For Information Darrel S. asked: Why were each of the tests (in the videos on website) done without a wall finish, such as gypsum board? The addition of gypsum board might change the temperature of ... Read More →

Cellulose Insulation Products Meet California VoC Limits

Cellulose Answer Man: Your Source For Information Vassilios C. asked: Hello. Since boric acid is registered as toxic are there any studies on possible volatile organic compounds in cellulose? Thanks. Answer: Numerous cellulose insulation products have been tested per California ... Read More →

Vermont House Another Great Example Using Cellulose Insulation

We continue to see more great examples of energy efficient home projects that include cellulose insulation in their design. One of the best is a Home and Barn project from Vermont featured in a story on Poptimes News. The home ... Read More →

Cellulose Insulation Helps Make The Pretty Good House

Cellulose Insulation is part of “The Pretty Good House” Concept Finding ways to reduce climate change and global warming impacts is a universal need around the world today. Many in the building industry continue to work on improving new home ... Read More →

Borates Used In Cellulose Insulation Don’t Deteriorate Metal

Cellulose Answer Man: Your Source For Information Dan R. asked: Looking for some recommendations on blown in cellulose – do you know of any reps in the Pacific Northwest who could help answer some questions? There seems to be a ... Read More →

What Can Be Covered Up When Blowing Insulation In Attics

Cellulose Answer Man: Your Source For Information Aaron F. asked: I had brand new electrical installed in my 2nd floor. Can I cover 1900 and 11b boxes that run along my floor in the attic? I also have 16 x ... Read More →

Assumption About Dense Packed Cellulose Settling

Cellulose Answer Man: Your Source For Information Michael D. asked: I know even with dense packed cellulose in the walls, it will settle because of building movements. ?Will that cause any problems for even 1/2 inch of settlement in the ... Read More →

Installing Cellulose Insulation Directly To Roof Sheathing

Cellulose Answer Man: Your Source For Information Gared E. asked: Can cellulose insulation be installed directly to the roof sheathing without baffles or an air gap. There are installed roof and soffit vents as if the house was to have ... Read More →

Introducing Cellulose Answer Man

CIMA Professionals Answer Your Insulation Questions CIMA is pleased to introduce our new Cellulose Answer Man service here on the Greenest Insulation Blog. Users on our website and the blog often send in comments and questions on a wide range ... Read More →

Cellulose Insulation Is Up To 85% Recycled Paper

CIMA Producers Support Recycling Programs Cellulose Insulation, made from up to 85% recycled paper, has the highest percentage of recycled content among common building materials used in the United States. This emphasis on recycled material in the production of cellulose ... Read More →

CIMA Publishes Cellulose Insulation EPD

Cellulose Insulation Environmental Product Declaration Published The Cellulose Insulation Manufacturers Association and the Cellulose Insulation Manufacturers Association of Canada, trade associations for producers of cellulose thermal/acoustical insulation in North America, and Sustainable Minds, a leading provider of products and services ... Read More →

Cellulose Insulation And Vapor/Air Barriers

The Facts On Cellulose Insulation & Vapor Barriers We receive many questions on the CIMA website Contact Us form every month. A recent one on cellulose insulation and air/vapor barriers (one of a flurry on the topic) tipped the scale ... Read More →

Don’t DIY Home Insulation If You Don’t Know How

For many homeowners, proper attic insulation is a common concern and an easy target for improving energy efficiency. Most older homes, and even many newer ones, simply lack the proper amount of insulation in their attics. However, there are many ... Read More →

Determine Current Attic Insulation R-Value

Here Is How To Determine Current Home Attic R-Value One of the most common questions homeowners ask is how to determine the R-Value of their current attic insulation. This typically results when a homeowner begins to think about improving their ... Read More →

U.S. Ag Dept. Mass Timber Initiative Good For Environment

Construction With Wood-Based Products Traps Carbon The U.S. Department of Agriculture Forest Service established a $1 million in fund designated for supporting the construction of mass timber projects on college campuses across the country. The initiative is designed to simulate ... Read More →

Cellulose Insulation Used In Historic Yellowstone Photography Store

Renovation of the historic Haynes Pictures Shop included Cellulose Insulation Cellulose insulation has been around at least since the time of Jefferson’s Monticello when old newspapers were used to insulate the famed mansion. Since that time, the product has evolved ... Read More →

New Green Products Make Greenest Insulation Blog Cut

We often recognize new innovative green products here on the Greenest Insulation Blog. There have been a few announced using cellulose for alternative products recently that appear to have promise and worth sharing. Many people are surprised to learn that ... Read More →

CleanFiber Joins Cellulose Insulation Manufacturers Association

Welcome New Producer Member CleanFiber LLC The Cellulose Insulation Manufacturers Association is proud to welcome our newest producer member CleanFiber LLC. CleanFiber was conceived by several veteran cellulose insulation installers. They recently began production at their state-of-the-art facility in Buffalo, ... Read More →

Beautiful Icicles Bad Sign For Insulation

Those Beautiful Icicles Likely A Sign Of Bad Attic Insulation The 2019 winter prediction report mentioned here on the Greenest Insulation Blog has proven to be very accurate. A cold and wet winter continues across most of the U.S. One ... Read More →

CIMA Producer Member Promotes First Female GM

Fiberlite Technologies Appoints Patricia Grubb CIMA producer member Fiberlite Technologies has promoted long-time employee Patricia Grubb to head the company’s production plant in Joplin, Missouri as General Manager. She is one of just a few woman to hold such a ... Read More →

Snow Offers Opportunity To Check Insufficient Insulation

Snow melting quick on house roof can indicate attic insulation deficiencies. While in the midst of winter it is often too late to add insulation to home attics, snowfalls can actually help to identify potential deficiencies that can be corrected ... Read More →

CIMA Member Advance Fiber Recognized

The CIMA producer member company Advance Fiber Technology was recently recognized in their local Ohio newspaper for many years of providing high-quality products. Advance Fiber is a family business founded in the mid 1970s by Dick Leuthold and sons Doug ... Read More →

NGOs Caution Foam Insulation Poses Human Health Threat

NRDC and the National Housing Trust Suggest Avoiding Foam Chemicals A report released by Energy Efficiency for All, a partnership of Non Governmental Agencies (NGOs) that includes the Natural Resources Defense Council (NRDC) and National Housing Trust, cautions home builders ... Read More →

Cellulose Insulation Producers Recycling Offsets China Cutback

China Accepting Less U.S. Recycling Means Paper For Cellulose China is curtailing the amount of recycling material it accepts from the United States. This continues to be a pressing problem since the U.S. has shipped much of its recycled paper, ... Read More →

Chinese Foam Insulation Including Banned CFCs

Reports Expose CFCs In Chinese Made Foam Insulation News reports broke this recently about the discovery of foam insulation manufactured in China that includes CFCs. According to the lead report by the Environmental Investigation Agency, now carried in several highly ... Read More →

Nanowood Could Be Perfect Compliment To Cellulose Insulation

Nanowood Has Lignin Removed Making It Less Heat Conductive We are always on the lookout for new trends in green building materials here on the CIMA blog.A story broke about an innovative new product called “Nanowood” caught our attention. Liangbing ... Read More →

Need For Recycled Building Materials Never Greater

Cellulose Insulation Has Industry’s Highest Recycled Content World-wide the amount of construction related waste continues to increase as growth booms in developed and emerging economies both. The need for recycling construction waste, and for innovative construction products that use recycled ... Read More →

Video Comparing Cellulose And Fiberglass Insulation In A Fire

Watch Test Comparing Fires For Cellulose Insulation & Fiberglass Insulation Here is another video that demonstrates the characteristic differences between cellulose insulation and fiberglass insulation. Titled “The Big Burn” by its producers, the video is not a true scientific controlled ... Read More →

Fire Burn Test For Building Insulation Products

Fire Test Videos Show Results For Cellulose & Fiberglass Insulation Products In the wake of the horrific June 2017 high rise fire in London interest in fire related to building insulation products surged. This fire was world-wide news and today ... Read More →

Settling The Myth About Cellulose Insulation Settling

A home building company recently contacted CIMA. They were considering changing standard features to include cellulose insulation in an effort to offer greener, more energy-efficient homes. But they had heard cellulose insulation settles and wanted to know how this affected ... Read More →

Cellulose Insulation Can Help EPA Landfill Reduction Plan

The EPA proposed new rules on August 14, 2015 to further reduce emissions of methane-rich gas from municipal solid waste (MSW) landfills in the U.S. These new EPA rules will by default likely require more emphasis on recycling of paper, ... Read More →

Blown In Insulation Product Review On Bob Vila

The Bob Vila website has a very good article covering the topic of blown in insulation. Writer Benjamin Hardy does an excellent job of comparing and contrasting the top products – loose fill fiberglass, cellulose and foam – and their ... Read More →

UpGrade Athens County Reforms Southeastern Ohio Energy Strategy

Weather can be serious business in Ohio with hot, humid summers, cold winters, and extreme weather possible throughout the year. With such a broad climate spectrum, proper weatherization of homes is critical to reducing household energy costs. As a byproduct, ... Read More →

Fan Direction & Other Frequently Missed Winterization Tips

Getting a home ready for winter is an annual fall event for most homeowners. The big items typically come to mind for most people interested in improving energy efficiency and lowing utility bills. Upgrading insulation, adding more caulk and replacing ... Read More →

What Is Passive House Design

The energy efficiency goal in the design of any home is ultimately passivity. Everyone would like to have a really comfortable home interior living environment with little or no cost for heating and cooling.  But what defines a truly “passive ... Read More →

Insulating Wall Cavities With Cellulose Best For Older Homes

The best way to achieve the highest level of energy savings in older homes is to fully insulate the total building envelope.  While most homeowners often add or upgrade attics many fail to consider insulating the exterior walls.  This leads ... Read More →

Summer Home Improvement Project Lists Include Insulation

Scouring the web for our Summer Home Improvement tips list uncovers a few good articles from a variety of sources. We found three lists that provide a good cross section of sources from RIS Media’s real estate driven news, to ... Read More →

Life-Cycle Analysis Tools Fall Short With Insulation Calculations

Life-Cycle Analysis (LCA) calculation tools can be valuable resources for designers, builders, building officials and even consumers trying to determine the environmental impact of building products and materials. These calculators are available from a variety of sources and vary in ... Read More →

Completely Sealed & Insulated Homes Don’t Need To Be Heated

Here at the Greenest Insulation Blog it has long been asserted the best energy saving home improvement is a well insulated house. A story at comparing the value of insulation in homes in Northern Europe confirms this premise. They ... Read More →

Airport Sound Mitigation Programs Could Use Cellulose Insulation

Airports and homes don’t mix and they never will. It’s an old problem that lately has been getting major attention in some cities with airports located in urban areas. All airplanes are loud and commercial jetliners are the loudest of ... Read More →

CIMA Makes Finding Cellulose Insulation Contractors Easy

Installing cellulose insulation in a new home or upgrading an older home is a great way to improve energy efficiency and save money for years to come on home energy bills. In fact, it’s one of the quickest return on ... Read More →

New Green Marketing Rules Old News For CIMA

The Federal Trade Commission (FTC) regularly updates its Guides for the Use of Environmental Marketing Claims. The “Green Guide” outlines the guidelines and requirements for companies and marketers making claims about their products’ environmental benefits. This update by the FTC is ... Read More →

Cellulose Insulation Waste Paper Innovations

The nations leading cellulose insulation manufacturers continue to find innovative ways to convert waste paper into energy-efficient insulation products. Cellulose insulation producers stay in tune with recycled paper trends, and with obvious interest in old newsprint (ONP) supplies. Recycled newsprint ... Read More →

Texas Insulation Fire Story Propagates Myth

A television station in Texas recently ran a story about a house fire and quoted a local fire official who erroneously stated cellulose insulation contributed to the damage. This insulation fire story from Texas includes many misstatements and errors based ... Read More →

Energy Audits And Home Inspections

Every year millions of houses are sold in the U.S. In many cases, a professional home inspection is conducted in the transaction process. The inspection is typically paid by the purchaser although, like most everything else in real estate transactions, ... Read More →

CIMA On Weatherization At The White House

Cellulose Insulation Manufacturers Association President Chris Hoch was a featured speaker at the White House this month. The first-ever Weatherization Supply Chain event was held June 15 as a forum to discuss the Department of Energy’s Weatherization Assistance Program (WAP.) ... Read More →

CIMA Offers Presentations On Saving Energy

It is certainly no secret that energy costs are rising for U.S. households and businesses. While the estimates vary, studies in the past few years have put the average energy cost for the typical household ranging from 10 to as ... Read More →


Receive email notices when stories are posted (name optional.)