Our first job is to get the old carpet glue up from the rubber backed tiles in the lounge areas we took up a month ago. We started into a second floor which is entirely the black stuff except for one area. I was just searching on here for ways to remove the carpet glue and found a post that asbestos flooring mastic is black. Being bound into a vinyl matrix the asbestos fibres can only be released to the air if the tile matrix is disturbed. That is, broken, cut, sanded, drilled, scuffed, ground etc. If tiles are removed whole without breakage there is little risk that the asbestos fibres will be released to the air.

Thermoplastic backing would likely be incompatible with cutback but I’m not sure if emulsion adhesive has the same kind of reaction to those backings. Those tiles you linked to have rubber within the backing but the layer in contact with the slab is thermoplastic with fiberglass reinforcement. So you’d probably want to segregate that backing from any unknown adhesive residue to be safe. For carpet tiles it heavily depends on the backing . Some are tolerant of most latex based or acrylic adhesive residue. The the goal is just to get an adequate bond and a smooth surface.

Carpet & Tile Mastic Removal

For larger areas spread a layer across the floor using a foam squeegee to prevent airborne dust. Use a roller to pulverize it into the surface. If you can walk on the mastic and it’s not sticky, start your grinder. Use the PCDs to get off 75% of the mastic and then switch to a 30/40 grit diamond. Finish off with a thorough mopping and your floor will be beautifully prepped for new coverings.

And if there is a moisture issue which we do not know what the results of the tests that were performed are. and we do not know if they were even properly done. I find that most moisture tests are not done to standards and the results are not accurate. Possibly a moisture mitigation product also needs applied. From the original post this seems to be a simple fix and install.

How To Identify Asbestos Mastic

After deciding on the correct ratio of sealant to water for your black mastic floor, spraying it on is a simple task. Holding the sprayer approximately a foot and a half from the surface, spray the sealant in wide, sweeping motions until an even coating is achieved. If you are using a liquid sealant, always read the labels and provided information carefully before spraying. Each product is different in how it should be mixed as well as how concentrated it is. Further, many black mastic encapsulation solutions provide different opportunities depending on how far you dilute.

It is funny how you can ask one question and get a million anwers to a question you never asked. I had bamboo floors installed last year and did not pay attention to the advice on this board and I now wish I had. They are faded from sun and have scratches, I used the hardest eco-timber product out there.

Concrete Overlays

Older floors often used mastic that contained asbestos. This can be highly dangerous to workers and inhabitants inside the building. This “black mastic” can slowly affect your employees’ lungs and skin health.

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Perhaps doing one section of the floor then moving the stuff over onto it and then doing the rest of the floor. Any suggestions and/or recommendations would be very helpful as well. paint will not adhere to cut back and neither will most adhesives.

It will contain a bag, shipping container, and special labels for the container. Find an asbestos testing facility online or in your local phone book. Front view of intercell burning backdraft hood showing flange and slot.

  • The tile was a given,the va stood for vinyl asbestos,also dry wall mud contained it.
  • While mastic does have strong points, such as great adhesive properties and adaptability to many substrata, high performance in wet areas is not one of its high points.
  • Because of the way it’s manufactured the asbestos tends to be bound up in both the tiles and the adhesive.
  • I used it in 65 degree and 45 degree temps, not much of a difference.
  • This process was so expensive and I could not afford it so I kept looking.
  • To protect yourself, get a commercial respirator that is designed to filter out asbestos.
  • Of course, the first and BIGGEST thing we did was pull up the carpet and carpet pad.
  • If you use this encapsulation compound does it afford moisture protection and to what extent – 10lbs/24hrs/1000sqft as in CaCl or 85%-95% rh as in insitu?
  • I can see how the staples would move over normal use and through expanding/contracting of the wood in seasons.

Vinyl floor tiles made before this time period could potentially contain asbestos and derail a major housing project. In this blog, we will discuss vinyl floor tile and how to manage the material. I never stated that the back adhesive was asbestos. If your moisture levels are not elevated and are within manufacture’s recommendations why would you go through installing all the plywood. You are left with black cut back adhesive that may or may not contain asbestos. Skim coat the entire slab with a portland base floor patch to encapsulate the black adhesive.

Sentinel 200 No Odor Mastic Remover

If you attempt to remove a piece of the mastic yourself, the disturbance can cause the fibrous asbestos to become airborne, potentially making its way into your lungs. most states limit asbestos removal to 100 sq ft when someone other than the home owner does the job. Any thing beyond that needed to be a licensed abatement company, which the house is sealed and special cleanup procedures are followed. Hire a contractor to test your tiles if you can afford it. The safest way to get your flooring tested for asbestos is to have a licensed contractor do it for you.

PerfectPrimer contains no toxic ingredients or unpleasant odors, and it can be easily cleaned up with water. Homeowners and contractors can use this product to safely seal black mastic. Once dried, they can apply their preferred finish or cover the floor with new flooring material. So, removing old linoleum or vinyl flooring may come as a surprise to some homeowners when they see smears of some type of black adhesive between the tiles and the subfloor. This is often called black mastic and it often contains asbestos.

Can You Cover Black Mastic?

I wouldn’t have been able to leave the tile alone once I figured out I could pop them up so easily. I’m glad you posted this because I didn’t know there was asbestos in floor tiles. If you read about asbestos, inhaling even one microscopic fiber can lodge in your lungs and then turn into an incurable cancer 30 or 40 years later. I lost a parent to mesothelioma–an asbestos related cancer. He must have been exposed in his 20’s or 30’s and then was diagnosed with a horrible cancer at 57 that we couldn’t do anything about.

The pH of the concrete must not exceed 10.0 before applying this product. And therein lies the problem going directly over the slab and asphaltic adhesive. If you use this encapsulation compound does it afford moisture protection and to what extent – 10lbs/24hrs/1000sqft as in CaCl or 85%-95% rh as in insitu? Prper moisture testing is mandatory in this installation. Not that the millions of yards of sheet vinyl has been glued over many slabs with only discoloration of that vinyl being the worse. The two layers of floating 3/8″ (11/32) plywood seemed to be much better than one floating 3/4″ layer.

Companies Associated With Asbestos Adhesives

This is because a wide range of black mastic products contain asbestos, a dangerous material that is known to cause mesothelioma, a life-threatening condition. During the mid 20th century, contractors used black mastics routinely as a glue-like flooring adhesive. If your house was built before 1989, the black mastic adhesive used is almost certain to contain asbestos due to how effective and cheap it was to make and use. Manufacturers at that time did not know about the potential health risks of asbestos and added it to their black mastic products. Once the asbestos floor tile or mastic is uncovered and tested by a licensed professional asbestos inspector, the question arises of what to do with it. If the tile will not be affected by a renovation, it is relatively safe to keep the tiles in a place as long as the material is in good condition.

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Asbestos may be present in textured paint and in patching compounds used on wall and ceiling joints. Vinyl tiles are often used in renovation projects since they stick easily to a variety of flooring surfaces. However, the longer these tiles are down, flooring over black mastic the more difficult they can be to get back up since the adhesive grows stronger over time. Typically, the “cut back” should be scraped smooth so the tile is not sitting on ridges of adhesive – although it does not have to be absolutely flat.

Can I Install New Flooring Over Black Mastic?

The new carpet tiles are being installed without adhesives and are a rubber backed commercial carpet tile. Photo 9 – The floor tile in this picture may have been removed non-friably and then placed in a lined fiber drum. However, the work crew used a hand tool to break up the floor tile in order to fit more into the drum. Floor tile must remain nonfriable from removal until it is disposed in a landfill.

Source: homemakerguide.com