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Discussion Starter #1
Another tile question!


I recently finished my shower and now I have noticed my grout is cracking and coming up in rather large chunks! I sealed it with 511 impregnator but it didn’t seem to help much!

What kind of grout exactly do I need to buy to stop this form happening?
 

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Ahhhhh, it's probably not a surface problerm but rather a preparition or sub surface problem thats causing it. If its just grout and not tiles that are coming lose it's almost gauranteed that the depth of the grout groves is too shallow. You need to clean the cement out of the cracks and make sure they are a good 1/8th inch deep.... Surface prep before tiling is mainly making certain the floor is flat as possible and free of lose paint or other old coatings before you lay the tile.... too much motar or too big of a notched trowel can also make problems with the grout lines.. Learned way to much about ceramic tile from swimming pools....

Sealers are mainly to keep the grout lines from getting dirty or growing algae on them.
 
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