This isn’t going to be fun?

gonegolfing

Member
Jul 11, 2022
15
Sydney Australia
Hi everyone!

Firstly, I hope I’m posting in the correct place. Secondly, I have searched the site (albeit briefly) but haven’t really been able to find anything that helped. Apologies if this topic is elsewhere.

Here is our problem……

IG fibreglass pool installed Oct 2018 during a pretty big renovation of our backyard. I used contacts and friends of friends to try and save some $$ but do feel, save for not engineering enough for water to escape, all jobs were done very well.

After experiencing a couple of years of drought, the heavens opened in early 2021 and basically the rain has not stopped (including a bunch of rain events and 3 floods). Whilst we are not located on a flood plain and haven’t been impacted by rising water, we do receive runoff from adjoining properties. We don’t have an overflow and during these rain events I cannot pump water out of the pool as fast as it is coming in. It truly is heartbreaking watching a crystal clear pool turn brown in 20 mins and that’s not to mention the 4-500 dollars it costs to clear the pool up each time.

During a late season swim in April 2021 (we encountered a 1 in 50 year flood in March) I found the floor of the pool to be like that of a 1990’s waterbed - a truly amazing experience. A plumber pumped out thousands of litres of water until the pool floor returned to normal. Until this time I had no clue what a sump tube was. I regularly siphon water from the tube now.

Fast forward to March of this year, after a flood event that was slightly larger than that of 12 months prior, I come home to this one Friday afternoon……


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It was at the end of the swimming season and we couldn’t afford what we thought might run into $30-$35K so we decided to secure the sight and tackle it in a few months time. The consensus at the time (not from us but from the shell provider + a builder mate) was that the pool shell had not ‘popped’ but rather the concrete under the travertine had sunk.

Fast forward to today where we start the process to get things rectified and I’m petrified that the pool shell has indeed lifted or popped. The water line in the following pic says it all. Has anyone encountered this or can anyone put my mind at ease by telling me that it won’t cost an arm and a leg to fix?

EAD4F92A-CEE9-43EA-9AE5-EC5EECFAE39D.jpeg

Apologies for the length of post!
 
I don’t know if it popped or the surrounding areas sunk. I’d imagine they will need to figure that out though before even trying to decide what to do about fixing it. That’s a lot of movement and underground pipes probably don’t move that much without breaking.

Is there a way you can design some drainage around the yard to prevent the inundations of water?
 
I think there’s going to have to be some sort of drainage solution included in the upcoming works - the magnitude will depend on what machines will be needed to fix the pool + of course costings.

I cannot find anything on the web where a newish pool (with hydrostatic valve), full of water, has popped.
 
First of all I am so sorry this happened. Your pool & travertine are beautiful. This might not be helpful but I have a vinyl pool in Iowa and they used polymeric sand around the pavers. They put a french drain all the way around the pool and it dumps out on the side of our house down a hill.
 
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It looks like the pool wall is raised in the last photo, based on how much of the wall is exposed near the fountain compares to the ends of the pool.

Can you give us some details on the pool construction (photos too)? I am guessing it's a concrete floor and maybe walls with a vinyl liner.

Can you see/feel any cracks/shifting in the floor or walls of the pool?
 
It looks like the pool wall is raised in the last photo, based on how much of the wall is exposed near the fountain compares to the ends of the pool.

Can you give us some details on the pool construction (photos too)? I am guessing it's a concrete floor and maybe walls with a vinyl liner.

Can you see/feel any cracks/shifting in the floor or walls of the pool?
Fiberglass pool.
 
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It does seem very odd for just the center part of a fiberglass pool to raise up like that. It’s much more likely to have had the other parts sink. Unless something really odd happened.
 
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Yep, fibreglass shell. As I said, the contractors used, in my opinion, did a great job. That said, I can now see that the concrete was not vibrated under the lips/edges of the shell - I’m not sure this would have prevented the popping anyhow??

The paver guy is coming by this week to offer his opinion - although he didn’t do the concrete he should be able to tell us if it has sunk at all.
 
That was definitely the thoughts during the diagnosis back in March but surely the water line (in the pic with the broken tiles) suggests otherwise?
Something went up or down, hard to tell from the pic. My pool had about 1/2 sink a little so. Or out of the question for it to sink that much.
 

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When it rains it pours! Had been running a siphon from the sump tube down to our front drive (50m hose) since Fri - started to notice that the pool level was dropping rather drastically yesterday so I took a photo for a comparison 24hrs later (the siphon usually stopped 2 to 2.5 days after heavy rain but was still flowing). After finding a further drop of at least two inches I went out to remove the hose and came across this 5m crack in the shell…….
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When it rains it pours! Had been running a siphon from the sump tube down to our front drive (50m hose) since Fri - started to notice that the pool level was dropping rather drastically yesterday so I took a photo for a comparison 24hrs later (the siphon usually stopped 2 to 2.5 days after heavy rain but was still flowing). After finding a further drop of at least two inches I went out to remove the hose and came across this 5m crack in the shell…….
View attachment 434839
Got a picture of the crack or where it’s located on the shell?
 
Did you happen to take pics during the installation? Pics of the base material used, etc? I'd be curious to know what was used and how it was installed. That, along with how the shell was acquired (friend versus local retailer) might determine the the shell would have any warranty. Such a shame and sorry to see anyone go through this. :(
 
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Did you happen to take pics during the installation? Pics of the base material used, etc? I'd be curious to know what was used and how it was installed. That, along with how the shell was acquired (friend versus local retailer) might determine the the shell would have any warranty. Such a shame and sorry to see anyone go through this. :(
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This is probably the only worthwhile one. We were away (Vegas) when it went in due to it having been postponed a month because of wet weather.
 
This is probably the only worthwhile one.
Rats. Okay. I was curious to see if they used sand or packed gravel as a base. The pool also appears to be set into a type of "bowl" in the backyard with a good potential for saturation which you obviously experienced for several months. With no way for water to drain away from the ground, I can see the potential for problems.
 

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