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How to Reduce the Hazard of Asbestos Floor Tiles or Sheet Flooring

  • POST a QUESTION or COMMENT On how to minimize the risk of asbestos contamination in a building due to the presence of asbestos-containing floor tiles or asbestos-suspect floor tile coverings

Asbestos floor tile or sheet flooring hazard reduction guide:

This document assists building buyers, owners or occupants in reducing the risk of asbestos exposure from flooring that contains or is suspected to contain asbestos.

Page top photo: asbestos-containing 9x9 floor tiles in a 1959 home, courtesy of Inspectapedia reader Steve. This floor is in good condition and should be left in place, covered-over.

InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.

Advice for Hazard Reduction for buildings with Vinyl Asbestos Floor Tiles

Asbestos-containing floor tiles in poor condition, producing some friable material, are unsafe (C) InspecApedia.comCommon sources of asbestos hazards in or on buildings include, among many other building materials, asbestos-containing flooring and flooring mastic adhesive.

Asbestos is safe and legal to remain in homes or public buildings as long as the asbestos materials are in good condition and the asbestos can not be released into the air.

Bottom line: Asbestos-suspect flooring, two cases, different options

  1. Asbestos-containing flooring or asbestos-suspect flooring in good condition

    (like at the top of this page) can and should be left in place and covered over with new material like carpeting or new floor tiles or sheet flooring or even using a sealant or an epoxy paint.
  2. Asbestos-containing flooring, or asbestos-suspect flooring that is damaged

    (like our photo shown here) OR that must be damaged during renovations or removal needs more-careful handling.

Because extra costs will be involved in removing asbestos-containing materials from a building, if you don't know if your flooring contains asbestos your choices are

Foremost it is important to avoid creating an asbestos hazard by improper handling, and while it is usually reasonable to cover over asbestos floor tiles with a new layer of flooring, it is also important that you proceed properly, often with local expert advice.

Our reader's photo of a partly-demolished asphalt-asbestos floor tile installation shown above is an example of asbestos flooring dust and debris that might be created during demolition, including friable materials produced by chopping, sanding, sawing, or grinding old floor tiles or sheet flooring.

See details at

DOES THIS FLOOR CONTAIN ASBESTOS? - 5 easy questions to tell if your FLOOR probably contains asbestos -

If the floor contains asbestos or if you elect to treat it as PACM, broken flooring should be cleaned up using HEPA vacuuming and damp wiping, and further demolition should follow practices given at

ASBESTOS FLOORING REMOVAL GUIDE

Please note: In addition to asbestos-containing flooring, common sources of asbestos hazards in or on buildings include: 

Friable and non-friable asbestos are more thoroughly defined

at ASBESTOS DEFINITION & COMPOSITION

Friable Asbestos Particle Hazards from Asbestos-containing Floor Tiles or Sheet Flooring

Asbestos product identification label Johns Manville (C) Daniel Friedman

Friable asbestos material is any material containing more than 1 percent asbestos as determined using Polarized Light Microscopy (PLM), that, when dry, can be crumbled, pulverized, or reduced to powder by hand pressure. - (EPA p, 3)

Properly defined in plain english, "friable" asbestos means that one can easily produce powdered material, for example by rubbing asbestos pipe insulation between one's fingers to produce a crumbly dust

. In this regard your floor tiles are a mix of asbestos and vinyl or asphalt, and are not readily friable.

The definition of friable asbestos is important, because non-friable asbestos-containing material is less likely to be an asbestos hazard in buildings, unless it is mechanically ground or pulverized.

What produces measurable airborne asbestos-dust is either running equipment that mechanically grinds or sands the tile surface (including some industrial floor polishers) over the floor surface, or using aggressive means of demolition that produce lots of small fragments of broken tiles during renovations.

Because asbestos is a harmless material if not airborne and breathed-in or ingested (at sufficient quantity or volume), it's not as if the floor tiles are "radioactive" or harmful just sitting there, or better still, if covered the tiles will be protected from wear, damage, and future asbestos particle release.

U.S. EPA Definition of Nonfriable Asbestos Material

The US EPA in their "Asbestos NESHAP Adequately Wet Guidance" defines "nonfriable asbestos material" as

Nonfriable asbestos-containing material is any material containing more than 1 percent asbestos as determined by Polarized Light Microscopy (PLM) that, when dry, cannot be crumbled, pulverized, or reduced to powder by hand pressure. (Op Cit. p. 3)

By this definition, asphalt-asbestos and vinyl-abestos floor tiles are normally and virtually always non-friable materials.

Leaving Asbestos Floor Tiles in Place: Advice About Covering or Sealing Asbestos Floor Tiles

1958 asphalt asbestos floor tile in good condition (C) InspectApedia.com Grace

In this photo, courtesy of InspectApedia reader Grace, we see a 1958 vinyl-asbestos floor tile that is in good condition. Grace found this floor when she removed wall-to-wall carpeting, and you can still see the carpet tack strips at the left edge of the photo.

Un-damaged asphalt-asbestos or vinyl-asbestos tiles or sheet-flooring materials are normally quite hard, not friable - not easily made into dust that can become airborne - and are best left in place and covered-over.

See details at ASBESTOS FLOORING LEFT IN PLACE - keep it and cover it.

Guidelines for Removing Asbestos-Containing Floor Tile (Vinyl-Asbestos Tile / Asphalt-Asbestos Tile)

Is Asbestos-Containing Floor Tile Removal Necessary?

We begin by suggesting that you should not remove asbestos-containing floor tile unless it is really necessary.

As with asbestos-containing products in general, the asbestos hazard at a building may be greater from disturbing asbestos-containing materials (ACM) than if they were left alone or covered up.

But in some cases, particularly during certain building renovations or when asbestos-containing flooring is in poor condition and cannot easily be left in place, removal may be necessary.

As we point out

at ASBESTOS FLOORING IDENTIFICATION, the US EPA points out

in ADEQUATELY WET ASBESTOS GUIDANCE, EPA340/1-90-019 that asbestos-containing floor tiles are considered non-friable materials but the materials can become friable with age or by grinding, sanding, demolition, etc.

Here is what the University of Minnesota has to say about the hazards of this type of asbestos-containing floor tiles:

Flooring that contains asbestos, when intact and in good condition, is generally considered nonfriable and is not hazardous.

Heat, water, weathering or aging can weaken flooring to the point where it is considered friable. Friable flooring includes any material containing more than 1 percent asbestos that can be crumbled, pulverized or reduced to powder with hand pressure.

This includes previously nonfriable flooring material which has been damaged to the extent that it may be crumbled, pulverized or reduced to powder by hand pressure.

Flooring can also be made friable during its removal.

Friable materials can release asbestos fibers into the air. Once in the air, asbestos fibers present a health hazard to people who inhale those fibers. - U. Minn atReferences or Citations

Watch out: if you must demolish or disturb asbestos-suspect flooring, because that process can create high levels of dust that might contain asbestos, it makes sense to have a sample of the flooring tested for asbestos before beginning work.

Short of testing, you would either treat the floor as PACM - Presumed Asbestos-Containing Material, which can add significantly to demolition and remodeling costs.

For making an educated guess before actual testing, there are five easy questions that can help tell you if an unknown floor covering contains asbestos, found at

DOES THIS FLOORING CONTAIN ASBESTOS?

Advice on Removing Asbestos-containing Asphalt or Vinyl Floor Tiles

Details for this topic are found at ASBESTOS FLOORING REMOVAL GUIDE. Excerpts are below.

First, here is the US EPA's general Asbestos Advice for Homeowners, quoting from ASBESTOS in YOUR HOME - U.S. EPA [PDF]

Asbestos Do's And Don'ts for the Homeowner

Please see complete details at ASBESTOS FLOORING REMOVAL GUIDE

Asbestos Advice for Building & School Building Operators (may apply to other buildings)

A good introductory explanation to the possible risk of asbestos in schools and similar buildings is

at The ABCs of ASBESTOS in SCHOOLS [PDF] (August 2003), U.S. EPA, Web search 08/17/2010, original source: http://www.epa.gov/asbestos/pubs/abcsfinal.pdf - aqui se encuenta la misma documenta escrito en Espan~ol: El ABC del Asbestos en las Escuelas, (copy on file as /sickhouse/EPA_Asbestos_ABCs_Schools.pdf ) fuente original: http://www.epa.gov/asbestos/pubs/spanishabcs.pdf

Quoting from that document:

In general, as with cigarette smoking, the more asbestos fibers a person inhales, the greater the risk of developing an asbestos-related disease. The most severe health problems from asbestos exposure have been experienced by some workers who held jobs in industries such as shipbuilding, where they were exposed to very high levels of asbestos in the air.

These employees worked directly with asbestos materials on a regular basis as a part of their jobs. Much uncertainty surrounds the risk from exposure to low levels of asbestos fibers.

Nevertheless, the risk of school children being exposed to even low levels of asbestos is a concern. Acting on this concern, Congress passed the Asbestos Hazard Emergency Response Act (AHERA) in 1986 to protect school children and school employees from exposure to asbestos in school buildings. This pamphlet describes key parts of these federal asbestos requirements for schools.

Operators of schools and other public buildings should see the U.S. EPA's ASBESTOS REGULATIONS FOR SCHOOLS (the Asbestos Hazard Emergency Response Act, "AHERA") [PDF] (live link given just below); these guidelines require that an accredited inspector re inspect school buildings at least once every three years to reassess the condition of ACM.

Asbestos Hazard Control Guidelines

EPA guidance for non-friable asbestos-containing material categories and handling - cited & discussed at InspectApedia.com

Above: Except from EPA's Guide to Demolition Practices (for non-friable asbestos material categories and handling) cited just below.

[Click to enlarge any image]

 




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Reader Comments, Questions & Answers About The Article Above

Below you will find questions and answers previously posted on this page at its page bottom reader comment box.

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs

Spanish Floor Tiles (C) Daniel Friedman ...

Question on reducing asbestos floor tile health risks in Spain

I live in Spain, in a house built in 1967, and I'm quite worried because I suspect that the floors of my house may contain asbestos. I have a baby is 9 month old crawling around the house.

[Click to enlarge any image]

Spanish asbestos floor tiles (C) Daniel Friedman

In several rooms I have a flaming ground, looking quite similar to many of the photos seen on your site. In some areas has deteriorated and has holes that emit or accumulate dust.

I'm not sure my flooring matches those shown on your site. I am sending photos (see image at left). if you are able to recognize or catalog. I really did not even know if this flooring vinyl or other material.

The floor tiles are quite thick (about 3 cm), with a thin layer of material seen (a few millimeters) and then a mortar or something similar. The asbestos-suspect floor tiles measure 25x25cm.

I hope you can advise me on the matter, think that contain asbestos? If so, what I can do at home? -- I.B., Spain

Answer:

Very small areas of damage like that shown in your photo are not a meaningful asbestos hazard but it would be good practice to clean the gouge and seal it using a at least a compatible clear sealant such as shellac or epoxy. Color-matched fillers are also available.

We have not seen this exact tile pattern before, but from our records it looks a bit like some of the Kentile flooring made in the U.S. (though yours is unlikely to be Kentile and your material is much thicker). Quite possibly your flooring was produced by a European manufacturer and is none of the brands for which we have data.

Our opinion includes the consideration that while foremost it is important to avoid creating an asbestos hazard by improper handling, and while it is usually reasonable to cover over asbestos floor tiles with a new layer of flooring, it is also important that you proceed properly, with local expert advice, so as to avoid creating inappropriate fear on the part of other users of the building.

Reader Question: How do I Determine if this 1930's Flooring Contains Asbestos & Can the Floor be Retained?

Unidentified floor tiles possibly rubber or vinyl asbestos (C) InspectApediaI am trying to find out what my floor is made of (photo at left). Also if it contains asbestos. It was installed in 1935 when the house was built. Thank you so much.

I have had a hard time keeping a protective finish on it. It hates water and will turn opaque where water gets on it as you can see from the picture in the foreground. - S.T. 2/17/2014

Moderator Reply:

I can't say for sure from just the photo but the colors make me think of a cork floor product; Can you send me some sharp photos giving a closer look at the floor surfaces?

Reader follow-up:

You bet!! The measured the depth of the floor is 3/16 of an inch.

The material is solid color throughout.

There is no backing, just solid material.

The chocolate brown is in 2 pieces for each square. The pieces are 18" by 36” and 10” by 36” for a total size of 28 X 36.

Rubber or vinyl flooring for identification (C) InspetApedia.com ST

The copper color measures 3” by 36” and the blonde is 1” by 6 ft (largest piece I could find)

This is a large room about 20 X 40ft.

Rubber or vinyl flooring for identification (C) InspetApedia.com ST

This house was built in 1935 by my great grandmother and has a lot of art deco elements. I have a lot of the original receipts but nothing I recognize as flooring.

I have a piece of the flooring and took pictures with my cell phone.

I have trolled online looking for information but it seems to be very hard to determine the material. I don’t believe it is cork.

I think it is solid vinyl.

The other floors in this house are 9” chocolate brown linoleum. I was unable to save those floors because they shattered when I tried to remove the carpet tack strips my parents used with wall to wall carpet in the 1970’s.

The linoleum was much less flexible than this floor. With this floor material I was able to carefully remove the tack strips.

It is actually flexible. It will break if bent too far but it will bend a little. This picture was taken right after finish was still drying. Shows the 2 pieces of the chocolate brown.

Moderator comments

About all I can guess from just photographs and without lab testing (which I'm not sure is justified) is:

Photo at above left looks like solid something - vinyl most likely from the color. See my comment below about rubber floor tiles;

Photo at above right, rather blurry, looks like cork floor tile held in cross section or "edge view", held up close to the camera, and for other readers, no this is not a bearskin rug on the floor.

Bottom Line:

If the floor is in good shape and you don't want to ruin its look by an epoxy paint, if you have not already completed applying a hard clear surface sealant (which I suspect you have) I'd look at liquid wax stripping and cleaning followed by coating with a clear sealant like the ones I discuss in this article series.

If the floor surface is sealed and un-damaged it's not going to be a particle source.

Rubber Floor Tiles?

There were also some rubber finish-flooring products in your other photos (not shown here).

The rubber-backed floor tiles I'm familiar with were red or black in cross section; Rubber flooring would be more flexible; usually older asphalt-asbestos or even vinyl asbestos (excluding the self-adhesive lines) are by now quite brittle and would break rather than bend unless heated.

Examples of rubber-backed flooring are

at ARMSTRONG RUBBER BACKED RUG PATTERNS

I would preserve what can be preserved, sealing the top surface with a clear coat; and for any cleanup of damaged flooring follow the safe procedures like wetting & HEPA vacuuming discussed

at ASBESTOS FLOORING REMOVAL GUIDE

Curiously some of my references assert that even rubber-based floor tiles up to the late 1970's or very early 80's contained asbestos filler.


...

Continue reading  at ASBESTOS FLOORING LEFT IN PLACE for more detailed procedures & products suggested for keeping an intact asphalt asbestos floor or vinyl asbestos floor in place or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Or see ASBESTOS FLOORING HAZARD REDUCTION FAQs - questions & answers posted originally at this page

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