Asbestos vs. Cellulose Insulation: What's the Difference?
Know what’s keeping your home warm
Asbestos is a hazardous material that was used in home insulation before the 1980s.
Cellulose insulation is made from recycled paper products and fire-retardant chemicals.
Unlike asbestos, cellulose is safe for human exposure and doesn't pose a cancer risk
To the untrained, naked eye, it can be difficult to tell the two apart
You know that insulation helps to keep winter's chill out of your home while keeping it cooler in the summer. But have you ever thought about what's in your insulation? Depending on when your home was built, there may be asbestos in your insulation. Sometimes, asbestos-based insulation can appear similar to cellulose material, which is not hazardous to your health. Learn the difference between asbestos and cellulose insulation and why it matters.
What Are the Differences Between Asbestos and Cellulose Insulation?
Asbestos and cellulose insulation will both keep a home warm, but the materials they are made from are considerably different. Another major difference between the two? Safety. The Environmental Protection Agency started banning products made from asbestos, including insulation, in the 1970s.
You can't officially identify asbestos without a microscope or lab testing, but there are signs that your home contains asbestos insulation based on the following.
| Type of Difference | Asbestos | Cellulose |
|---|---|---|
| General appearance | Fibrous, cotton-like | Shredded paper |
| Color | Silver-gold | Shades of gray |
| Home’s age | Pre-1980s | 1970s onward |
| Materials | Silicate mineral | Recycle paper |
| Safety | Carcinogen | Non-carcinogen |
Asbestos vs. Cellulose Insulation: Differences in Appearance
The only way to accurately identify asbestos insulation is by hiring a professional asbestos testing company near you to take a sample and examine it. However, you can spot slight differences in appearance between asbestos and cellulose insulation.
Texture
Asbestos insulation may look like cotton while cellulose tends to resemble shredded or fluffy paper. Another notable difference between the two is the presence of shiny fibers in asbestos insulation.
Color
Cellulose insulation tends to be shades of gray with a brownish tinge since it's often made from recycled newspaper or cardboard.
Asbestos insulation tends to be shiny and may look more like silver or gold than gray or brown.
Asbestos is odorless—so don't rely on your nose to tip you off about asbestos in your home. Asbestos fibers are too tiny for humans to detect their smell, so even large amounts of asbestos will lack a scent. The only way to know if your home has asbestos is to have a pro test for it.
Age of Home
Before people understood the dangers posed by asbestos, it was considered a wonder material, capable of preventing fires. The material was nearly ubiquitous throughout the mid-20th century and was frequently used in homes and other buildings.
After the EPA banned asbestos, its use was phased out. So, if your home was constructed after the mid-1970s, it's more likely to contain cellulose or another type of safe insulation.
Materials
Asbestos is the name of a group of naturally occurring mineral fibers. Amosite, or brown, asbestos, was the type most commonly used to make insulation. It has long, brittle, straight fibers.
Cellulose is actually a carbohydrate and the material that makes up the main cell wall of plants. Because it is stiff and strong, it's often used to make paper. In some cases, that paper ends up transformed into cellulose insulation.
Safety
When products containing asbestos, like insulation, are disturbed, they can release tiny fibers. Inhaling those fibers can put a person at an increased risk of developing lung and other types of cancer. That’s why qualified local asbestos abatement pros are the only people who should remove asbestos materials from your home.
While you may worry about the presence of asbestos insulation in your home, the best thing to do if you suspect it's there is to leave it alone. Left undisturbed, asbestos can't release its fibers. However, if you have any major renovation work planned, it's best to call someone to test the insulation and confirm the presence of asbestos.
On the other hand, you're unlikely to inhale particles or fibers from cellulose insulation if the material is disturbed. But, it's worth noting that boric acid, which is often added to cellulose insulation to reduce flammability, can cause irritation and other health concerns following skin contact or ingestion.
For that reason, it's a good idea to exercise caution around any type of insulation. When in doubt, call in a pro.
No, squeaky floors do not always indicate structural damage related to a shifting foundation or subfloor damage. However, they may indicate underlying issues like loose subflooring, joists, or floorboards. While many squeaks are harmless, persistent noise could point to more severe problems besides being extremely annoying. It's always best to have a professional inspect your floor to determine the root of the issue.
Yes, carpenters can fix squeaky floors. They have the expertise to identify the source of the squeak, whether it’s loose floorboards, subfloor issues, or joist problems. These experts also have the right tools and hands-on knowledge to secure the flooring and eliminate the noise, ensuring a long-lasting solution.
While it may not always be ideal, you can fix a squeaky floorboard without removing the carpet. Pros use specialized carpet screws and drive them through the carpet into the subfloor, securing floorboards. They may also use nails instead of screws if they suspect the pile will get caught in the screw. While some types of carpet will hide the screws and nails, a low-pile carpet may not.
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