Self-leveling concrete - ok to put down if slab is damp?

[CT2012]

I need to put down some self-leveling concrete and get a part of the garage floor up about an inch. It's raining now and a bit of dampness is building up in certain key areas where i need to pour.

Is it ok to put this stuff down with the slab damp? Rain is supposed to stop in another day and then will have a few days of moderate/cool weather and it should dry out a bit.

Thanks for any tips/advice.

 

[CT2012]

Anyone?

Here's a snapshot of what the dampness looks like.

 

[ConCretin]

My initial thought is that you should address the water infiltration issue to avoid problems with rot, mold, etc in your wall.

I'm not sure what you are referring to by "self leveling concrete", but most cementitious products won't be affected by a little dampness. I would however roughen up the surface before placing an overlay to get a better bond

Most products that can be applied an inch thick won't feather out to nothing so you might wan't to cut in a 1/4" edge to place against.

If you plan on installing any kind of flooring, be prepared for that crack to telegraph through. If the corner of the slab dropped an inch, that that crack is a pretty bad.

 

[CT2012]

that frame and sheetrock is brand new--literally just did it the other day. used pressure treated over pink foam for baseplate, ramset into concrete in between the studs. it was solid as can be, no crumbling, etc.

the crack and settling is decades old, fortunately. hasn't moved in years.

met with amasonry guy this morning and i think we found the source of water penetration. that long crack you see carries to the edge of the concrete slab where it meets the driveway asphalt. i hadn't thought of it, but he said water's getting in there and traveling, dispersing a bit to the left (when looking into garage) since there's a slight pitch to the left right there. that makes sense. so we're going to cut out the section where there's a crack and re-do it. hopefully a simple & quick fix. then seal the gap between asphalt and concrete (a 1/4" gap) with some heavy duty outdoor self leveling caulking.

My initial thought is that you should address the water infiltration issue to avoid problems with rot, mold, etc in your wall.

I'm not sure what you are referring to by "self leveling concrete", but most cementitious products won't be affected by a little dampness. I would however roughen up the surface before placing an overlay to get a better bond

Most products that can be applied an inch thick won't feather out to nothing so you might wan't to cut in a 1/4" edge to place against.

If you plan on installing any kind of flooring, be prepared for that crack to telegraph through. If the corner of the slab dropped an inch, that that crack is a pretty bad.

 

[slickgt1]

Dry pack mud job would love that dampness. I'm not even kidding.

I never liked the self leveling concrete. It really won't feather out to zero. You can try feathering to zero, but set tile, if you are still going that route, as soon as you can.