Hello,

I have a plastic mat glued to a concrete floor in the basement that needs to be removed. We plan to lay tiles there instead. The area is a total of 28 m2.

I have spoken with a couple of equipment rental companies, and one suggests a large grinder while another suggests a small milling machine to roughen the surface a bit.

What do you think? What’s best?

The glue is a bit sticky at the edges, but looking in the middle, it seems quite dry.

I have checked that there is no asbestos.
 
pelle242 said:
Isn't it a scarifier you should have? Like
[link]
It looks like it could take quite a long time with one of those?

Right now I have booked a machine called HTS 420, I hope it sounds like a reasonable machine?
 
htc420 works well make sure you get a tool called t-rex for it
 
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Andreas_kalmar said:
htc420 works well, make sure you get a tool called t-rex with it
I talked to them and the tool that comes with it is silver, which is the tool most often used for grinding concrete floors. It removes 1/2 mm of the concrete floor. T-rex tears more and can take up to 6 mm if you happen to stand still for too long, so their recommendation was the silver? Does that sound reasonable?
 
silver is a color not a tool :-) have been working with concrete grinding for 20 years what they mean by silver is that it is step 1 and the tool is available in 4 versions depending on the hardness of the concrete, namely S1 M1 H1 and X1 without knowing which concrete quality you have, one cannot say that it is the right tool but with such a small machine I would have tried M1 regards Andreas
 
Andreas_kalmar said:
silver is a color, not a tool :-) I've been working with concrete grinding for 20 years. What they mean by silver is that it's step 1, and that tool comes in 4 versions depending on the concrete's hardness, i.e., S1 M1 H1 and X1. Without knowing what concrete quality you have, you can't say it's the right tool, but for such a small machine, I would try M1. Best regards, Andreas
Thanks! So I've booked a tool in step 1, but there are 4 versions? Should I call them again to ensure I get specifically Step 1 M1 then?
 
check if they have m1 can also be called ca1 if it has been on the shelf for a while
 
What does this mean exactly? What was booked for me took about 1/2 mm off the concrete, isn't that enough? Actually, I don't want to grind down the concrete at all, just remove the glue, but I guess I have to sand the floor a bit to get rid of the glue. How can I be sure that the floor will be even so it doesn't become uneven after sanding?
 
one cannot say it takes ½mm it depends on the concrete quality a high material removal tool like an X1 will definitely take 1mm on a soft concrete floor but it also means a lot of tool wear which means it costs more money per m²
 
Andreas_kalmar said:
you can't say it takes ½mm, it depends on the concrete quality. A high removal tool like an X1 definitely takes 1mm on a soft concrete floor, but that also means that it uses up a lot of the tool, which means it costs more money per m²
Thanks, why don't you think that S1 is enough? Or will it take forever perhaps? There must be something that indicates that this floor is "normally" hard? Or do you mean that all floors vary greatly?
 
All floors are different but presumably, a basement floor under carpet is suitable to sand with S1 or M1.
 
Okay, let's try with S1, is there anything else to consider besides closing all doors and wearing a mask and ear protection?
 
if you feel that it doesn't absorb well, you can moisten the floor with a little water
 
I have now picked up the machine, heavy to say the least. However, I didn't get a manual with it but I assume it's pretty self-explanatory.

What I reacted to is that there is a regular plug but there is also an outlet for 3 phase? Do you need 3 phase to run this machine?
 
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