Grout cracking at tile edge - TilersForums.com

[Pierluc]

High-Performance, Polymer-Modified Floor and Wall Tile Mortar
MagniFlex Ultimate 8830 is a high-performance, polymer-modified, single-component, thin-set mortar for setting ceramic tile and dimension stone

Deflecto :
For joists that are SYP or Douglas Fir, in good condition, 9.25 inches tall, 1.5 inches wide, 16 inches on center, and 14 feet long between supports, the deflection calculated is 0.442 inches.

This translates to a deflection of L / 380.

Since the maximum deflection for tile is L / 360, and for natural stone is L / 720, your floor is rated for Ceramic tile, Congratulations!


Seems like im just a hair good enough for ceramic tile, would adding more wood cross under the floor help ? or another hanging beam halfway to distribute the weight ?

but i dont thing structure is the problem, the half section i did with the grout mixed well did not crack at all .... or not yet

 

[DHTiling]

OK all is well...

I think you need to remove the bad area's of grout and re-do them..

 

[Pierluc]

hard to see, had to wet the floor to see it, its just a couple weeks old i hope it doesnt get too bad. Any electric tool working well to remove grout ?

 

[DHTiling]

A quick question.. did you walk on the floor before the grout was set.?

 

[Pierluc]

yes i probably did

 

[DHTiling]

OK.. That could have caused it to deflect slightly and break the bonf between the tiles and grout...

Best thing is to re-do those area's.. grout and wash off then leave to set..

A fein is a good tool for re-grouts.. Ultracolour dries hard..

 

[Pierluc]

alright thx for the help, ill wait a couple months to see if it all holds up and regrout the places that needs it