Latest Discussions : Miscellaneous

tcgood

09:16AM | 11/13/05
Member Since: 11/12/05
6 lifetime posts
I purchased a house built in 1965 last year and the basement has leaked for the past 10-15 years on and off. As such, many of the floor tiles have become very loose and popped up off the floor. I know from neighbors that they are asbestos tiles (9x9) and since I have some ambition to renovate the 1500 sq. ft. basement, I have already started to remove some of the tiles. Because of this site, I learned and followed all the precautions discussed in previous posts to safely remove the tiles. It has gotten to the point that nearly none of the tiles break during removal.

My concern now, however, is what about the black mastic glue that is beneath the tiles. I would want to know if this is a problem as well. Someone informed me that I should cover the high traffic areas with plywood to prevent further disturbing any of the mastic that may contain asbestos as well. I was also told that as I remove the tiles, to cover the mastic asap with whatever new floor tile I decide upon. Any recommendations here?

Thanks!


Fortress

11:52AM | 11/13/05
Member Since: 02/17/05
43 lifetime posts
You have three removal options with glue that is most likely to be asbestos:

1.) The Resilient FLoor Covering Institute (www.rfci.com) recommends wet scraping with water--soak it down and scrape using a scraper. Though recommended, I would find this very tedious and likely to leave lots of residue.

2.) Chemical remover. Floor covering people don't like these because the chemical agents tend to leach into the concrete and make future floor mastics less likely to bond. It would get the stuff off, however, it makes a really gooey and sticky sludge that will ruin just about everything it touches (including your tools).

3.) Leave it and skim coat it. I would not recommend plywood subflooring because of the possibility of moisture/condensenation and future mold. If you really want to encapsulate it, skim coat it with some sealer. Otherwise, just leave it alone. By the time you apply a new glue and floor, any fibers are most likely going to be "permanently" bonded in there and unable to get out.

Hope this helps.

Fortress Environmental Solutions

www.fortressusa.com

tcgood

05:52PM | 11/13/05
Member Since: 11/12/05
6 lifetime posts
I think I

Fortress

11:17AM | 11/14/05
Member Since: 02/17/05
43 lifetime posts
From my standpoint as an asbestos-guy, you could use either. You would need to talk to a flooring-guy to see what he would say about adhesion of the new flooring.

Fortress Environmental Solutions

www.fortressusa.com

rootsdave

05:47PM | 11/25/05
Member Since: 11/24/05
2 lifetime posts
Hello,

I have almost the exact situation as the original poster. In house, built in 1962, I have removed the tile, and the floor is black mastic. I also have a persistent odor associated with the mastic that is unpleasant - in fact, I could smell it slightly before I removed the carpet, pad, and tile.

Skim coating sounds like a great idea, but I

am concerned if the odor will remain after a skim coat. Is it possible that it would?

Any suggestions would be appreciated.

Dave


Fortress

12:00PM | 11/26/05
Member Since: 02/17/05
43 lifetime posts
I've never heard of the mastic itself smelling bad. I'm not saying it can't but this is new to me. Is it a petroleum type of smell or more sour? Asbestos itself has no odor at all so it would have to be in the binders--or in the floor beneath.

If it's a sour smell, I would be inclined to think there is a mold problem rather than the mastic. If that is the case, it's ultimately a moisture issue and the floor needs to be thoroughly dried before you skim coat it (e.g. humidifier for a few days until you don't have to empty it anymore). Also, if it's mold you'll have to address the reason for the moisture problem in the first place. But you probably know this already.

Sorry I can't help you more.

Fortress Environmental Solutions

www.fortressusa.com

rootsdave

04:11PM | 12/04/05
Member Since: 11/24/05
2 lifetime posts
Hello,

Thanks for your input.

The smell is hard to describe - there is some sort of pertoleum component, but it does have a sour odor also.

It looks like there has been some water issues in the room at some point in the past. Thankfully, there does not appear to be any water issue now. I think the smell is residual. I'm hoping that removing all the old material and drying the room out is going to help.

I very glad to know I don't have to try to get the mastic up and that I can seal it with paint.

Thanks again,

Dave

MistressEll

08:40AM | 12/08/05
Member Since: 01/30/05
360 lifetime posts
Since you have obvious moisture issues with the cement floor of your basement, coating the entirety with mastic will not work. Vapor and water will continue to "bubble up" via your concrete and "crack & pop" any mastic layer you attempt to "seal the floor" with - eventually!!!!

You'll end up with friable issues with the mastic all over again.

Best method is to:

Contract with a registered asbestos lab to test a sample of your mastic (they'll chip off a bit of your concrete surface containing mastic.

Even if the microscopic analysis is negative -- you'll need to be prepared for a more expensive BURN test. It is 80%+ likely you will have asbestos in the mastic.

The wet scraping method is your only reasonable approach in your already proven "wet issues" basement floor.

Keep in mind that until you correct for these issues any thing you do with this basement floor will most likely cause you other issues/problems (cracking, MOLD etc.). You really need to address your moisture problems before you think about throwing more finish money into the project!

The encapsulation method suggested by fort's post number 3 is obviously contra-indicated by the information the OP has already provided regards to his basement floor situation/conditions.

Its a nasty job -- but somebody needs to do it.

The odors you describe regards to the black mastic are common, especially when in an "always damp" situation, especially after having been recently disturbed by your removal of the tiles. Thinking it is also likely that at some point you either created friction during removal, and/or used the assistance of heat to help in your removal. BTW, this suggests that a slury of mineral spirits will be your likely most sucessful aid in its (mastic) removal. Also one coat of laytex paint is a class III moisture barrier.

BV003180

05:05PM | 02/04/14
I know this is a really old thread, but I wanted to reply to possibly help someone who needs to remove the black mastic from their floor. I ran into a similar situation in my prewar loft conversion. Somewhere along the lines, the beautiful vintage mosaic floors were covered with black mastic then tiled over in vinyl. When the building was converted to residential, the developer removed the vinyl tiles and just carpeted over the mastic. If you do decide to remove it yourself, I found that the best way to remove the old mastic is to use a wall paper steamer and floor scraper. The moisture from the steam will help keep the friable material down (if there is asbestos) and scraping up the mastic. Of course its best to always send a sample to the lab for testing. In my case it was only $20.

BV003506

01:57PM | 03/11/14
Leaving the Black mastic is not a good idea at all it can give a asbestos release when walked on. Second The new mastic's do not bind well with the old mastic and my seep through your new floor leaving you with a constant clean up off asbestos mastic seeping through. The best mastic solvent on the the market is Attack 2000 it is very low odor and after you complete the work just wash with warm water and powder laundry degenerate. You will also need a some thing to adsorb the solvent after you have used on the mastic cellulose insulation works best or saw dust.

BV004529

01:29AM | 06/01/14
Alot of people are telling me to use kilz and I can paint the floors after wards.. Then I have someone telling me no will not work.. The smell I have is the carpet was very old and the padding and the tile came up very easy.. So no dust under the tile. I have bleach the floors. And trying to figure out the easy way and the right way with out spending alot of money... I did use kilz in the bedrooms and its kills the odor of the old carpet. really dont think its the Black Mastic. We have carpet over that and no problems the rest of the house were painting the floor.. Any suggestions? Thanks

BV005763

08:19PM | 09/21/14
I just wanted to let anyone looking into this issue know about a product we used, it's called bean e doo. I know weird name, it's made of soy beans and it removes the black mastic keeping the asbestos non friable. I think you can search the product and watch videos of the process. We had great success removing the mastic from concrete slab. We're not sure what to do on the second floor though.
Good luck all.

BV010118

10:15PM | 01/13/16
Hello, I recently purchased a house and decided to put hardwood floors in. The area had carpet so I thought it would be a quick job to pull up the carpet. After pulling up the carpet I saw there were wood tile underneath. I decided to pull that up. Now I'm wondering if its asbesto, if I've been exposed and should I seek a doctor? I was totally unaware and was not properly dressed with safety attire.

Also, how do I remove this now?

I'm so lost...Help a woman out please...
Screenshot 2016 01 13 19 27 39

BV010579

07:23AM | 02/20/16
I have removed layers and layers of asbestos from my kitchen and bathroom all the way to the subfloors to add ceramic tile. Huge difference in smell for the while home it made. I have an attic that had the tiles as well on the plywood where there is tons of black mastic. It smells like tar or some kind of old odor especially when it heats up in the summer. I've tried killz paint and didn't work. I know they sell mastic removers; which I'm using in my basement to seal the floor afterward. I'm thinking of just ripping the plywood out and putting new down since it creaks when you walk on it because they used nails.

BV011173

09:26PM | 04/06/16
Citristrip! Apply at least an ⅛ inch thickness of gel. Leave it for 20-24 hours. This will turn the mastic and even any remnants of carpet backing to gel. On hardwood I follow with mineral spirits and steel wire brush wash. Easy with the brush.

BV011173

09:48PM | 04/06/16
Citristrip picture didn't post so trying again. Black on right is untreated.
Img 20160406 203754

BV011445

01:12PM | 04/29/16
What product should be used to seal the glue?

For the scenario where someone takes off tiles and wants to just seal the glue rather than scrape it off. Then put floating floor or carpet over it.

Thanks!

BV011671

11:40AM | 05/20/16
Does this look like it could contain asbestos? We pulled up old carpet and are redoing a house that was built in the late 50's. My husband believes it's the rubber backing that disintegrated after years of wear and tear. It's very dust like but some of it sticks to the floor but easily comes off with a sponge and water.
Image

BV011887

09:24AM | 06/09/16
I have them typical va tile with black glue to be safe assuming it's all asbestos tile comes up easily in full pieces no concern there. Then concern is there glue. Im gluing engineereed hardwood tested a spot and my new glue bonds to the mastic. My question is why can't it just lay over there black mastic

Mendo

10:26PM | 06/15/16
Member Since: 06/15/16
1 lifetime posts
we are trying to get a house ready for sale but the basement was leaking so we have people jack hammer all around the inside of the basement to lay tile to got to the sump pump, we are now taking up the tile and it is kentile floor tile that is suppose to have 25% asbestos in it and i am sure the glue too. we took up the the tile. the space is approx. 500 sq ft. anyway we took up the tile and want to know if we should scrape up the old glue is there any problem, or can we cover it with a sealer and new glue with new tile. i really need a answer to we can get the work done to sell the house

BV012245

07:54PM | 07/15/16
Just completed pulling up old 9" tiles from basement floor. They came up very easily using 4" scraper. Most of them broke into large chunks. Underneath on the concrete floor, is the black mastic or glue referred to in this thread. The surface of the mastic is not broken, but quite smooth. I'd rather encapsulate it with paint or polyurethane if possible. We are putting down new carpet. Can someone provide a product and/or method of doing this, if it's possible/adviseable. Thanks!
Basement floor

BV012245

07:57PM | 07/15/16
hah, wrong photo obviously
Basement floor

BV017333

08:26PM | 09/05/18
Did you end up figuring out if it had asbestos? If so, what did you do to remedy the problem? Thanks

BV017737

08:05PM | 10/19/18
Skim coated it with what kind of sealer? Name brand would help me since I’m a DIY girl.
Thanks, Sandy

BV017927

11:47PM | 11/10/18
I hired a company to remove asbestos linoleum floor. They said the mastic remover was low odor. But it smelled extremely strong to me. It's been a month & the chemical smell of the mastic remover is still very strong. We've kept the windows open everyday. The new floor hasn't been installed yet. So the subfloor is still exposed. Guess the mastic remover seeped into the concrete. I'm hoping that once the new floor gets put in, the smell will eventually go away. Is there anything we can do to speed up the process & get rid of the mastic remover smell?

BV018021

11:40PM | 11/18/18
Hello everyone, I am putting new kitchen/family room flooring in the house my parents built in 1961. My situation has become much like the previous posts. The one difference is the was put on a pressboard (acts like a sponge when wet) which is still sound. I am concerned that skim coating may cause it to swell. So should I just remove the underlayment ( it has the black adhesive on it) and start over from the sub floor with new underlayment or skim coat and install my flooring? I am so overwhelmed with this whole thing. Thanks for your help.

BV018021

11:43PM | 11/18/18
Oh I forgot my 3rd option...put a thin underlayment over the floor after all the tiles are removed .

BV018348

02:36PM | 01/05/19
Can you seal the mastic and do a paint over it like painting a cement floor?

BV018967

10:42PM | 03/26/19
I have a slightly different problem. I am needing to pull up carpet and I am wanting to lay Lifeproof vynel tounge and groove. Under the carpet someone already removed the Asbestos tile and scraped it. It seems to jave a layer of thin wood on top of the subfloor but..... the wood is white plastic on the inside and after being tested its 15% asbestos. How do I safely pull up the carpet and pad and cover it so I can lay flooring without disturbing it or the tackboard. It looks like there is still glue.

BV019500

11:45AM | 06/10/19
Old floor with 9 x 9 tile. In tack. Except for a few small areas. Black glue firm... can I cover it with something until new carpet installed

BV019608

08:53PM | 06/25/19
Similar issues, but after trying to strip the mastic, it got sticky but nearly impossible to scrape up. Can I skimcoat with Ardex over the sticky mastic?


Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button

Anonymous

Post new button or Login button
Register