You should visit your local flooring retailers and ask them for quality floor patch. Alternatively, Ardex and the Henry company are the same. You can find Henry's Feather Finish at Home Depot. Mapei also makes quality floor patching compounds and can be found at Lowe's.
The existing floor is solid - just not level. Low spots are perhaps 1/4" in depth. About 25-40 sq/ft of 300 sq/ft room needs some leveling. I found a distributor nearby that has Mapei Ultraplan Easy in stock.
The existing floor is solid - just not level. Low spots are perhaps 1/4" in depth. About 25-40 sq/ft of 300 sq/ft room needs some leveling.
Patching, not leveling. You have been over-sold on SLC. It sounds like you are trying to fix the problem with the wrong products. SLC is also more difficult for the novice to apply than patching compounds.
Why not tell us what the project is all about. Maybe we can give you better guidance than you've gotten so far.
Sure. And first thank you for the help!
The addition was built over an existing pad which has a terracotta tile floor. Except around the perimeter which is a combination of a) old concrete floor which for whatever reason had not been tiled b) new concrete which was poured to make the room rectangular. So there is ~20-40 sq/ft which is below the grade of the tile. The lowest points are about 1/2" below grade. The tile is in good shape and is pretty close to level. The new floor being installed is a hardwood floating floor.
What is the difference between patching and SLC? What manf./products are used for a patch? What is the difference in surface preparation (primer/sealer/etc)? My main concerns are:
1. that whatever I apply won't crumble over time beneath the floating floor
2. that it won't be adversely affected by moisture (the concrete pad is on ground)
Excellent photo and those words you added to them, what I would do is if your sure that tile is flat use it as a screed to level off of with a straightedge, you can do it dry to mark the depths in various areas and when your ready to pour, you will know by looking at depths written approximately to pour a little more in deeper areas , little less in shallow.
I would probably patch the tile/grout joints also (patch)
I didn't understand the grout joint comment.
I have to get the concrete level and to the same height as the tile. My original plan was an SLC. Are you saying that the Ardex feather finish product would be better for this as opposed to the SLC? What makes it better in my situation?
There may be "adhesive residue" on the old concrete as it once had linoleum tile (hence surface being below tile). According to PDF, this would have to be removed if it is water soluble. I doubt that it is water soluble since it would have presumably washed away by now.