Replies

1. 
   xxPaulCPxx | Jul 03, 2011 03:12pm | #1

   What kind of paint is it:  Drylock, latext, polyurathane garage floor paint?

2. 
   nutmegcocoa | Jul 08, 2011 06:06pm | #2

   The paint is latex.

1. 
   sapwood | Jul 08, 2011 10:13pm | #3

   Read the directions on the bag of thinset. They ought to tell you what a suitable or unsuitable substrate/surface is. If not, then I'd contact the thinset maker and ask.

3. 
   ericlangeconstruction | Jul 12, 2011 01:48pm | #4

   Tiling over slab.

   Don't tile right over the paint unless it's well adhered to the concrete.  If it is, start by pressure washing the floor to remove any loose paint and general dirt (make sure there is a floor drain....)  Then, scrub the slab with a water and TSP solution to remove

   grease, etc, and rinse very well.  Let the slab dry properly.  Check the tile mortar instructions - it may a require a specific primer to be installed over slab.  This may be important as the slab (unprimed) may absorb a lot of the thinset moisture and cause problems with curing and adhesion.

   Eric

4. 
   nutmegcocoa | Jul 13, 2011 09:58pm | #5

   Thanks for writing, Eric. The pressure washer is a great idea. Unfortunately, the area in question is a finished room, so there are no drains present, and the walls are drywall. Any other thoughts are greatly appreciated. 

1. 
   DanH | Jul 14, 2011 06:23am | #6

   Be REAL careful with that pressure washer.

2. 
   aimless | Jul 18, 2011 11:16am | #7

   Maybe go back to what they had before pressure washers: stiff wire brush and elbow grease.