Need for protection when concrete/plaster milling

[erik8308]

Hello,

I am planning to rent a concrete grinder to remove some plastic paint with what I believe is a bit of black mold. I am thinking of renting a Flex or Festool and connecting it to my CTL26, using a P3 mask on myself.

Does it create so much dust that you need to seal it off and open windows, or will most of it end up in the vacuum? There isn't a lot of black mold.

See attached image, it looks darker in the picture than it is. It hasn't grown in the 10 years we've lived here, so it probably came from before they did the drainage.
Thanks in advance

 

[Wilhelm14]

Hi,

I was thinking of renting a concrete grinder to remove plastic paint with a bit of what I believe is black mold on it. I was planning to rent a Flex or Festool and connect it to my CTL26 and wear a P3 mask.

Does it create so much dust that you need to use plastic sheeting and open windows, or will most of it end up in the vacuum cleaner? There isn't a lot of black mold.

See attached image, it looks darker in the picture than it is. It hasn't grown in the 10 years we've lived here, so it probably comes from before they drained.
Thanks in advance

I wouldn't tear down or sand anything with mold without a proper half-mask (Sundström or 3M), proper "sealing," and other necessary protective equipment, mold is nothing to play with. However, I'm just a layman and might have taken it a step further than someone knowledgeable, but better safe than sorry.

 

[Testarn]

Yes, it's really dusty and it gets in/out everywhere...

I a small room in the basement, I sanded some paint and concrete with a grinding cup on an angle grinder. The door was closed most of the way (a crack for the power cable) and I had plastic hanging down over the door, but I had to stop because the dust spread into the room outside. It got a bit better with water on the floor where I was sanding, but in the end, I had to build partition walls with studs and plastic to keep the dust in check.

 

[hempularen]

Even though most of it ends up in the vacuum cleaner, you will get dust not only in the room outside but in the rest of the house, all the way into the drawers. So seal it off properly.

As for any possible mold on the surface, it's probably not a problem. But cement dust is unpleasant regardless. And as mentioned, invest in a good mask. There are more situations where it will be useful.

 

[erik8308]

I currently use Sundström p3.
It's not much, is it possible to think of something more manual that produces less dust?
Like a hand scraper and holding the vacuum nozzle close by?

 

[erik8308]

We're talking about maybe 3 square meters. I just want to get rid of the mold and remove some of the paint (apparently that's enough for the wall to breathe), then I'll paint over with silicate paint.

 

[Wilhelm14]

We are talking about maybe 3 square meters. I just want to remove the mold and take off some of the paint (apparently that's enough for the wall to breathe) then I paint over with silicate paint.

Solution with vinegar or bleach/chorine cleaner to "kill" and remove the mold
https://plasticinehouse.com/how-to-remove-mold-from-concrete/
https://www.wikihow.com/Clean-Mold-Off-Concrete

To remove the paint, it's probably just a matter of using some paint remover

 

[erik8308]

Solution with vinegar or bleach/chlorine cleaner to "kill" and remove the mold
[link]
[link]

To remove the paint, you just need to use some paint remover

interesting, I will try it. It sounds like a much better solution...