Brown coat failing...structural issue?

Jota

New member
Jul 15, 2023
3
Cedar Park, TX
Pool Size
14000
Chlorine
Salt Water Generator
SWG Type
Jandy Aquapure 1400
New pool owner and new to TFP. Hoping to get some advice from this great community (and hoping I've posted this under the correct forum). The pool was built in 2017 by the previous homeowner and I'm concerned with the large gaps between the brown coat and ground at the back of the pool. As you can see in the photos the pool is right next to 2 large trees which suck every ounce of water out of the soil here (Austin, TX area). With the current drought and contraction of the clay-based soils here in central TX, the ground is definitely going down. I noticed a small gap early this spring and simply added more dirt to fill it in, but now it's much worse (likely due to 45+ days of over 100 deg temps and subsequent soil contraction). I've been trying to water the ground as much as possible but it's not doing much, if anything. At this point the PVC pipe feeding the 3 sheers is now exposed and totally unsupported in this area. Also seeing hairline cracks going up and over the top of the pool, and 3 tiles at the water line are now cracked. To the right of the exposed PVC, the pipe appears to have concrete under it but in these areas that have failed I see no evidence of there ever being concrete. Maybe it was poor installation? Do I have a structural issue or is the brown coat simply cosmetic? What would be the proper way to shore this back up? Do I just backfill with dirt or do I need to use concrete, non-shrink grout, etc? Or do I need to get a professional here to assess?


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What concerns me the most is the strait crack that goes from the pool wall and continues through the coping.
Ground movement is occurring and this is putting pressure on the pool shell.
With out removing the brown coat/coping and exposing the severity of the cracks, I would suggest getting a professional opinion of the situation and options of how to properly correct it.
 
Thanks for the feedback. Any suggestions on who I should bring in? Would it be a plaster/brown coat specialist, foundation company or a pool builder? My neighbor is a PB and came over to look at it. He didn't think I had anything to worry about and that if there isn't water leaking then it should be fine. I definitely want a second opinion.
 
As a former civil/soils engineer, I think it warrants further investigation. Mainly because of as AQUA-HOLICS said, that crack is disconcerting. It points to a lack of support under the entire structure.
 
Yeah we just moved to TX from Minnesota last year so clay contraction is new to me. We've had no rain for 10 weeks here and temps over 100F for 45+ days which is an all-time record for the Austin area. Along with the pool issues, our house foundation is moving too (cracks forming in walls and porcelain tiles). I'm pretty convinced this is all related to clay contraction but have a couple of foundation companies scheduled to come out and do an assessment. In the meantime I am now watering around the perimeter of the house and pool regularily to prevent further damage. From what I've read, Texans use soaker hoses on the regular during summer months to keep the soil hydrated so I'll look into adding those.
 
Definitely a new one for us Floridians. Wish we could give the dry areas some of our excess moisture!
 

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