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These questions & answers about the asbestos content of fiberboard sheathing products such as Beaverboard, Celotex, Gold Bond, Homasote, Insulite, Nu_Wood, were posted originally
Non Toxic Insulation
Hard to tell from just a photo but it looks like some type of insulating panel or fiberboard used as a base for a ceiling system that has exposed a different type of insulation above it that almost looks like shredded paper.
Most wood or plant-based fiberboard does not contain asbestos. If you want to be sure of any possible asbestos content, you can have a sample tested.
You might also want to compare that upper insulation with our photos of mineral wool or rock wool, for which you can find our articles by using that phrase in the on page search box
Could This Wall Material Contain Asbestos?
I'm wondering if this may have asbestos in it. My house was built in the 1940s and im assuming this paneling has been here since then. Can you tell me if this looks like it may contain asbestos?
The date of installation would be an important clue. Take a look at the suggestions found at our home page for this topic at
Yes, you can take a look through the article I suggested, and then see if you can identify your specific fiberboard product as one of those discussed there - by pattern or stamping.
Asbestos Database A Z
Thank you so much for your reply! I was worried because this fibreboard has similar patterns on surface as the Low Density Board (LDB) Fiberboard Products shown in the article refereed (but the colours are different). Is there anything I can do to reconfirm it does not contain asbestos? Many thanks!
Hi. I am from UK - recently bought this house and found some broken fibreboard-looking materials under my kitchen sink floor. I am worried that we might have been exposed to asbestos.... Do these materials contain asbestos? Many thanks!
Had a roof leak and had to tear away some ceiling to get to it. The ceiling material turned out to be some sort of insulation board or particle board. My home was built in 1922 and I don’t know if this was an addition later on or what.
Efeu Hinter Einer Innendämmung
Either way, I’m concerned I may have exposed myself to asbestos and wanted to post a picture on this amazingly informative website to see if you had any input. I can find any markings on anything I’ve taken off but it looks quite similar to some of the other products you’ve posted.
@margie thaxton, you won't see any visual difference in a product that has cross-contaminated particles of another substance such as a special toast. You'd have to have the product tested.
Ok so if a old fiberboard would have gotton cross contaminated by asbestos, would the fiberboard look any different after being torn out of a wall or ceiling, like would the fiberboard still look tan or brown or appear white inside also or anything one could notice?
Alte Fensterbank Sturz Handgeschlagen Behauen Sandstein 2 115cm In Baden Württemberg
@ Moderator, ok so are you saying that the nu wood fiberboard has actually been found that some of it has been cross contaminated?
Asbestos by cross-contamination is a topic we cite eleven times in the article above. We've looked at the question repeatedly and in general found a possibility but little supporting research.
However for some of these wood-based or cellulose products, cross contamination with asbestos did occur. See our NU-WOOD discussion just below for an example.
Asbest Test Promabest
It is noteworthy that these products indeed included some ceiling products and installations as the U.S. Forest Products lab has documented, illustrating a fiberboard ceiling in a ranger station. Excerpting from the US FPL document cited below we include that image here:
Fiberboard ceiling panel, US FPL excerpted from www.fs.fed.us/t-d/pubs/htmlpubs/htm07732308/However a number of asbestos and mesothelioma information sources point out that some fabrication plants that at one time processed asbestos materials also processed wood-fiber products and thus there were hazards of cross-contamination and worker exposure to asbestos in those locations.
None of those references that I have read (this is not an exhaustive research) confirmed asbestos hazards in the cellulose products themselves, even though such is technically possible. An example follows: ....
Conservation Treatment Of Haydn's The Seven Last Words Of Our Savior On The Cross (cary 508)
So please read the article above where we discuss exactly the question you raise, and then don't hesitate to ask if you have further questions or comment if you have suggestions for this topic.
A new Google Scholar search for asbestos in fiberboard does yield articles that combine those terms, though you must read with care to be sure the article isn't discussing asbestos-cement products: a different product line.
Has asbestos ever been found in the old fiberboard ceiling board material in the u.s. ? mine is not tiles but a smoothe painted board for the ceiling
Heavy Metal Shredders
Ok sorry i didnt explain better but i know its not an ingredient in fiberboard but i mean has it ever been found by being cross contaminated and if so like how common and im also in the united states if that matters
On occasion, by including Ward Furniture Co, and Durham, NC and searching for patent disclosures in the 1940s, including perhaps 1940 - 1960, using Google Scholar often you can find a patent assignee that identifies Ward Furniture and a mention - or no mention - of asbestos in their products.
@MVille, Well, after contacting the Ward Furniture Co. in NC, I was told they were primarily a retail distributor and have no relation to the mid-century manufacturer which must have gone out of business.
Tiles From Cinca, M15x15, Tot About 90m
One piece is stamped on the back WARD Manufactoring Furniture Co. and another is from Harmony House. After digging a bit I discovered Ward Furniture CO in Durham, NC is a private company established in 1948 and incorporated in North Carolina. They are still in business today.
Harmony House was a Sears home interior brand that started in the 1940s. There were dates marked on the objects, but as you can see the stamping was not done well and the year is missing. Not sure if you are aware of any asbestos use by these two companies. I will try to contact Ward since they seem to still be in business. Thanks for your help.
Thank you for the photos and the question. As you'll read in the article above, most fiber board does not contain asbestos. But I'm not familiar with the Pionite fiberboard product line and we'll do some research and post further findings here.
What Exactly Is This Fiberboard Looking Sheathing?
Any details you can add about country of location and age and brand of products where this fiberboard was used will be helpful.
We do know that Pionite as a fiberboard product and a line of laminate countertop materials dates from about 1946, but if it's as suggested by your photos, a wood fibre product, then the advice on the page above still pertains.
The current company www.pionite.com was founded in 1999 - Pionite is a brand name of Panolam IndustriesTM, Inc. - so most-likely those folks will have little to say about your question.
Ply Wood Bilder
Hi, I have a few pieces of wooden mid-century modern furniture. The tops are a Pionite material and the rest is either solid wood, veneer, or pressed fiber backing. I have looked all over the internet and have not found clear answers regarding the safety of either the backer boards or the underneath of the Pionite top.
Do you have any circumstances where you have found asbestos contained in these materials? Any guidance or wisdom on this topic would be greatly appreciated.
But yes you want to find and fix the leak, inspect to be sure that there's not enough damage to warrant replacement, then paint/seal the area to protect it from further deterioration.
Sold Antique Burmese Parabaik Manuscript On Palm
Keep in mind that if the leak is from behind the board material that we can see, there will be some hidden damage there.
That is a plant-product - fiberboard; your much greater concern here is extensive rot and the question of safety of the structure itself.
No I agree testing it's really not necessary I read the information articles that you suggested and I will take your advice.
Fracture Atlas — Ogilvie Geoscience
I was just asking if I ever needed in the future to have a sample tested. Sorry I misworded my question. Thanks so much you have put my mind at ease I really appreciate it.
First, I'm not sure testing that material is necessary other than as a peace of mind step for someone who'd rather pay a lab than read through the information on this topic. That said, you can certainly have a material sampled for asbestos.
But, I'm sorry that we cannot the lab testing service that you asked about. In order to absolutely assure our readers that we write and report without bias we do not sell any products nor do we have any business or financial relationships that could create such conflicts of interest.
So Wird In Der Mühle In Melle Westhoyel Mehl Gemahlen
After decades of field investigation
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