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Old 04-05-2013, 10:59 AM   #1
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


Hi, my name is David, and I came across this website via a google search. I searched the forums for an answer to this, but it didn't yield any results pertaining specifically to this question.

I currently have laminate flooring in my main hallway/foyer area, and next to it lies the dining area, which is carpeted. My cat sprayed in that carpeted area, and I haven't been able to remove the smell, so I bought matching laminate to replace the carpet with.

The problem is, when I started pulling up the carpet, I quickly realized that the pad underneath had been glued to the concrete. And I'm not talking about snail tracks - I mean it's caked between the pad and the concrete slab.

After doing some research, I came to the conclusion that the only effective way of removing this glue is by using a rental concrete grinder. Just as the name suggests, this machine removes the glue by grinding a fine layer of concrete from the top of the slab.

My question is - How thick of a layer will this grinder remove, and will it affect my ability to match the new laminate at the same height as the old? If so, how can I accurately fill the ground(grinded) area so that it provides a stable base for laminate, and is precise enough to seamlessly meet and match up/interlock with the existing laminate?

Thanks.

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Old 04-05-2013, 01:58 PM   #2
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


How big of an area are we talking about?

I used an 8" long handled razor blade scraper and a few replacement blades for my basement. It worked really well but it did take some elbow grease.

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Old 04-05-2013, 02:00 PM   #3
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


I doubt you'll be taking that much off,and if you do an extra sheet of vapor barrier will make it up.
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Old 04-05-2013, 02:12 PM   #4
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


Forgot to say you may have to remove the urine odor before you do the floor,if so here's help.

http://www.remove-cat-urine.com/THE-RECIPE.html
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Old 04-05-2013, 02:36 PM   #5
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


brock - The room is 10.5'x11.5'. Do you think just a scraper would work? I'd much rather do that if my efforts won't be in vain.

canary - The underlayment that I'm using is a 2in1 foam/vaporshield combo. When you say add another layer of vaporshield, you mean just buy the vaporshield separately and add that to make up the difference?
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Old 04-05-2013, 02:37 PM   #6
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


Thanks for the urine odor removal link. That's very helpful.
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Old 04-05-2013, 05:11 PM   #7
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


"canary - The underlayment that I'm using is a 2in1 foam/vaporshield combo. When you say add another layer of vaporshield, you mean just buy the vaporshield separately and add that to make up the difference? "


Only IF you should grind off more material to make up for what you ground off,which i doubt very much.
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Old 04-05-2013, 05:21 PM   #8
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


Quote:
Originally Posted by dmh0284 View Post
brock - The room is 10.5'x11.5'. Do you think just a scraper would work? I'd much rather do that if my efforts won't be in vain.

canary - The underlayment that I'm using is a 2in1 foam/vaporshield combo. When you say add another layer of vaporshield, you mean just buy the vaporshield separately and add that to make up the difference?
I think you could get all of that scraped up in a day. I wont lead you on to believe that it wont be hard work because it is. I found that keeping a sharp blade in the scraper really helps. I think I got about 16 sq ft per blade. Keep the scraper at a 45* angle and put downward pressure on it while you're pushing forward.

The grinder will be quicker I'm sure but having never used one I dont know how much they are or how tough they are to keep constant. Worst case I guess you throw down some leveling compound afterwards.
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Old 04-05-2013, 06:07 PM   #9
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


So, upon further investigation (see attached pic), it appears that there is only glue around the perimeter of the room. That should make it easier to scrape up (yay!), if I decide to go that route. I probably will do that, instead of renting a crazy machine that I don't know how to use.

Thanks a ton for your responses guys.
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Old 04-06-2013, 08:10 PM   #10
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


I've started scraping, and it seems that I'm getting most of it off. The floor no longer feels tacky, but there still seems to be a shimmer on the floor where the glue was, when I look at the spot at an angle where light hits it. How thorough do I need to be when getting this stuff off? Won't I just be putting underlayment over it anyways?
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Old 04-08-2013, 10:40 AM   #11
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


I think as long as the floor is flat you are good to go. Get off any high spots. If you truly want to get it all off you can do what we did and use hot water and a little dish soap. A little scrubbing will get it clean.
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Old 04-22-2015, 01:33 PM   #12
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


Hi btw if you use straight white vinegar it will neutralize the cat urine pour it on let it sit 5-8 hours (probably less but I took no chances) then hot water or a steam cleaner then a mop no matter what the vinegar will disappear in a day or two.

I read about this online and it actually breaks up the protein and bacteria in urine/coffee barf etc.... esp. in concrete had a rental in Dallas and the girl ruined my cement floors and drywall had to do the vinegar about 2 times over 3 days including my wood patio and it did the job....

I've also had success with using a spyder scraper on my saber saw that was pretty easy... I think you can also use mineral spirits with the scraper you can also use an oscilation saw sorry don't spell well...
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Old 04-22-2015, 04:51 PM   #13
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Grinding concrete to remove carpet glue, and matching height of existing laminate...


DMH0284:

Several things:

I agree with using a flooring scraper (with the 4 inch blades) to scrape off the carpet glue. There may still be some glue in the porous surface of the concrete, and you can get that off by painting lacquer thinner onto the glue and covering the wet surface with wax paper. Then hold down the perimeter of the wax paper to prevent evaporation of the lacquer thinner. When I do this, I just use a steel chain that runs around the perimeter of the wax paper, but anything, even some boards, will work. Allow the lacquer thinner time to soften the glue, and then remove the wax paper and scrub with a steel wire brush to remove the remaining glue. Lacquer thinner is mostly toluene and evaporates completely without leaving any residue. The lacquer thinner should evaporate out of any residual glue, and you should then be able to sweep or vaccuum up that residual glue.

Obviously, when using highly volatile and flammable solvents, make sure to provide plenty of ventilation and take a break outside if you find yourself day dreaming a bit too much. In other words, you're working with dangerous materials, so use your head to keep yourself safe.

Cat and Dog urine fluoresces under ultraviolet light.

Also, you should know (cuz most people don't) that the urine of all mammals fluoresces under ultraviolet light, and professional cleaning contractors use ultraviolet lights to locate urine deposits AND gauge how effectively their cleaning chemicals are at removing that urine. The fluorescence isn't blindingly obvious like a 70's Jimi Hendrix poster one might stare at while stoned, but in complete darkness the urine fluorescence will be noticable. Cover windows with aluminum foil. Metals are the most opaque materials known to man; you can stop more light with aluminum foil than you can with any other material of equal thickness. The benefit of using a black light is that it allows you to focus your efforts on those areas where the urine deposits are the worst for more efficient cleaning. Experienced cleaning professionals can identify the species of animal and whether or not it was pregnant when it urinated by the colour and fluorescence of it's dried up urine deposit.

Cleanfax is a web site that caters to the cleaning professional and has both a Q&A forum where you can ask questions about eliminating cat urine odors from professionals, just like in here. That web site also has a search engine at the right end of the dark blue banner at the top where you can find several good articles on using ultraviolet lights to locate and identify different kinds of mammal urine. Search for "black light". Or, on Google search for "black light urine identification". You'll find lots of stuff about locating and identifying pet urine using ultraviolet light.

http://www.cleanfax.com/

Bane-Clene is a well respected name in the Janitorial Services sector of the economy, and they make a professional grade black light for detecting pet (primarily cat) urine.

http://www.baneclene.com/catalog/energizerlight.html

http://www.baneclene.com/catalog/ult...let_light.html
(this web site gives you some phone numbers for more info)

It costs $113.29 plus (presumably) shipping. You can use the black light to not only find the cat urine deposits, but judge how effective your cleaning efforts are by the reduction in fluorescence after cleaning.

Look in your yellow pages under "Janitorial Equipment & Supplies" and you'll find local business that sell products for eliminating cat urine odors. They might also RENT the black light you need to locate the urine deposits too.

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Last edited by Nestor_Kelebay; 04-22-2015 at 05:18 PM.
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