Do I need to scarify old concrete slab?
Hi, Thanks in advance for any help!
We are tiling an older house in Phoenix that also has a newer addition. The older part of the house has original concrete floors that we have been told had color added in the top most layer. It doesn't appear to be sealed in any way however, and is now about 70 years old. The new section was poured about a year ago.
Our plan is to do some grinding and SLC in the old section to get flatness, but wonder if we need to scarify or "shotblast"? the rest of the area?
We will be putting in 20" ceramic tile - most likely using Mapei Ultracontact (based on stuff I've read here).