Weir Wall Issue - Waterproofing Questions Efforesence

mojo1980

Gold Supporter
Feb 1, 2019
117
houston
Hi TFP Family,

Got a tough question, I have a 37' Weir Wall, mastic was used. Im using Serveon NS200 for tile. I have a 3" tile line on pool side, 12"edge 45degrees tiled, and back wall is tile. Im two years into the pool, since the beginning of pool I got efflorescence on the back of the wall (troth side). Besides sealing the tile not sure what could be done. Is this common?
 

mojo1980

Gold Supporter
Feb 1, 2019
117
houston
This was waterproofed with Mastic but cementious grout not epoxy group. I had delimitation of tile in one section, I checked for cracks and there is a lot of small cracks on the top of positive side on the negative piece (45 degree). Thanks!
 

bdavis466

TFP Expert
Platinum Supporter
Aug 4, 2014
5,018
San Clemente, CA
Mastic is not waterproof and if they truly used mastic, that was a very poor choice

"..... we feel that mastic adhesive is not appropriate for use anywhere where moisture is present. Although the manufacturer is correct in stating that tile will hold up to limited water exposure, who’d want to choose mastic over thinset when using it in area where limited water exposure could possibly end up being “more than limited”......

True mastic is derived from organic sources - an we dump gallons of chlorine in the pool to kill organics right???

Even if thinset was used (which I hope was) the thinset has to be rated for continuous submersion which very few are.
 

duraleigh

Admin
Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
32,843
Sebring, Florida
I can't see your situation and it might be too late now but a better solution than attempting to "Dang up" the water behind the pool is to put a french drain behind the wall and drain away the water. Water takes the path of least resistance so if you can let it flow away from the back of the wall the efflorescence will stop.
 

bdavis466

TFP Expert
Platinum Supporter
Aug 4, 2014
5,018
San Clemente, CA
I can't see your situation and it might be too late now but a better solution than attempting to "dam up" the water behind the pool is to put a french drain behind the wall and drain away the water. Water takes the path of least resistance so if you can let it flow away from the back of the wall the efflorescence will stop.
This is on an infinity edge...the water is coming from the pool
 
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duraleigh

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Mod Squad
TFP Expert
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Apr 1, 2007
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Sebring, Florida
This is on an infinity edge...the water is coming from the pool
I see. I had it pictured differently. So, has it been determined that it is not simply overflow and evaporation from the edge? Is there a pic?