[pgaggini]

Hello all, I have 4 questions about some concrete sub-floor repairs.


I recently pulled up the linoleum in my washroom and am going to install vinyl planks so my plan for preparing the concrete floor is;
Clean up concrete floor surface with a wire cup brush on an angle grinder.
Brush on a bonding adhesive.
Pour down floor leveling concrete.



1st question:

I am only at the 1st stage of cleaning the concrete floor with the wire brush and am wondering how far down I should be taking it. Currently I have made the surface smooth and shiny, so taken off the grey, rough part of the concrete. Was this correct or too much ?


2nd question:

Also, as shown in the pictures, when I pulled up the linoleum some concrete sub-floor came up with it.

My question is, should I keep chipping away and remove this layer of concrete (which I suspect is self leveling type) or should I leave it and pour the self leveling concrete down?



3rd question:
As shown in the pictures, the drywall has a gap about 1/2" from the floor. Is this ok, and if not what should I do to fix this?


4th question:
As shown in the pictures, around the toilet flange there are big gaps.
Should I be filling these in or just leave them as is ?
If I do need to fill it in, what method and materials should I use to do this?




Answers for any of these questions would be greatly appreciated along with further tips and advice. Thank you.

 

[stadry]

someone else take this - i have NO idea how to proceed for lvt

 

[de-nagorg]

Hello all, I have 4 questions about some concrete sub-floor repairs.


I recently pulled up the linoleum in my washroom and am going to install vinyl planks so my plan for preparing the concrete floor is;
Clean up concrete floor surface with a wire cup brush on an angle grinder.
Brush on a bonding adhesive.
Pour down floor leveling concrete.



1st question:

I am only at the 1st stage of cleaning the concrete floor with the wire brush and am wondering how far down I should be taking it. Currently I have made the surface smooth and shiny, so taken off the grey, rough part of the concrete. Was this correct or too much ?

You have removed enough.

2nd question:

Also, as shown in the pictures, when I pulled up the linoleum some concrete sub-floor came up with it.

My question is, should I keep chipping away and remove this layer of concrete (which I suspect is self leveling type) or should I leave it and pour the self leveling concrete down?

Probe the edges, and remove any loose bits.

leave it to be filled by the self-leveling mix.

3rd question:
As shown in the pictures, the drywall has a gap about 1/2" from the floor. Is this ok, and if not what should I do to fix this?

Good base molding will cover anything left after the new mix is dry.

4th question:
As shown in the pictures, around the toilet flange there are big gaps.
Should I be filling these in or just leave them as is ?
If I do need to fill it in, what method and materials should I use to do this?

I see evidence of a minor leak from the wax ring, for a long time.

You need to analyze the flange for near rusted out, and maybe replacement.

Be careful with the mix here, but still try to fill the gaps with it.

And get a rubber seal, instead of another wax ring.

And you must allow for the height difference from the linoleum, to vinyl planks.

If the flange is too rusted to tighten the bolts, and seal it needs replaced.


Answers for any of these questions would be greatly appreciated along with further tips and advice. Thank you.

Answers in Blue above


ED

 

[rafaelrobertson]

Hello all, I have 4 questions about some concrete sub-floor repairs.


I recently pulled up the linoleum in my washroom and am going to install vinyl planks so my plan for preparing the concrete floor is;
Clean up concrete floor surface with a wire cup brush on an angle grinder.
Brush on a bonding adhesive.
Pour down floor leveling concrete.



1st question:

I am only at the 1st stage of cleaning the concrete floor with the wire brush and am wondering how far down I should be taking it. Currently I have made the surface smooth and shiny, so taken off the grey, rough part of the concrete. Was this correct or too much ?


2nd question:

Also, as shown in the pictures, when I pulled up the linoleum some concrete sub-floor came up with it.

My question is, should I keep chipping away and remove this layer of concrete (which I suspect is self leveling type) or should I leave it and pour the self leveling concrete down?



3rd question:
As shown in the pictures, the drywall has a gap about 1/2" from the floor. Is this ok, and if not what should I do to fix this?


4th question:
As shown in the pictures, around the toilet flange there are big gaps.
Should I be filling these in or just leave them as is ?
If I do need to fill it in, what method and materials should I use to do this?




Answers for any of these questions would be greatly appreciated along with further tips and advice. Thank you.
concrete repair orlando

To answer your questions.
1- if you have a smooth floor you are good, the point here is to not have any bumpy or old chunks of glue, try a heat gun to soften it, and then pull it off. The remaining glue can be scraped with a floor scraper or soaked overnight with water and dish soap, which helps soften the glue. Again, use a paint scraper to remove the linoleum glue that is remaining.
2- I would encourage you to remove any loose sub-floor, this way you are not jeopardizing the structure of you new sub-floor once you poor the new self leveling concrete.
3- The drywall is ok, the gap that you see is normal to have this allows for expansion without cracking the drywall. Also, this protects your walls from water damage and allows the walls for air circulation ( basically, many great reasons why to leave that little gap there ) . NEVER put a drywall against the floor.
4- just leave it as it is. (remember, concrete expands and contracts )
Note: Make sure you vacuum the surface before pouring the cement. make sure to put a wood or stiff cardboard to stop it from running into areas you don't want it to go.
best of luck with your project!

 

[Matt1963]

It would appear to me someone already installed some self leveling product and it's failing. Most likely because of poor floor prep.

Remove all the self leveler (SLU) and rent a floor sander. Sand and clean the floor spotless before doing the SLU.

Anything less an it could fail again.

 

[de-nagorg]

It would appear to me someone already installed some self leveling product and it's failing. Most likely because of poor floor prep.

Remove all the self leveler (SLU) and rent a floor sander. Sand and clean the floor spotless before doing the SLU.

Anything less an it could fail again.

This is 2.5 years old, most likely it was resolved, and never returned to update us.

ED

 

[Matt1963]

This is 2.5 years old, most likely it was resolved, and never returned to update us.

ED

Someone responded before me and I didn't catch that it was an old thread.....thanks for letting me know.