Hello,
I've got a 20K inground gunite freeform pool, which I am told was built in 1996. I've owned it since 2018. It looks like it needs re-plastering and plan to do so next spring. I'm getting a quote of about $13.5k for that.
However, I noticed three things recently. The first is that I noticed that when my son jumped into the pool, he was able to dent a hole in the plaster floor. It's about 2" and is circular (I can't get a good picture of it; a section of plaster was cracked and pushed down into the floor). It's as if there was a hollow spot and he jumped on it, which dented it.
Second, near the second floor drain (which is almost dead center in the pool and pushes water into it), the floor feels hollow. And when I gently tap my foot on the plaster floor near the drain, I can feel the vibrations in my other foot...almost like there is water/air underneath the plaster. The "hole" is about 6 feet from the floor drain - they are not really close to each other.
Third, I think I can feel more "hollow bubble" spots around the shallow portion of my pool, near the floor edges and stairs (as if I could stomp on them and cause a similar dent like my son did).
I am not losing water that I am aware of. But I am sucking air into the pump when I change the jandy valve to pull water from one skimmer instead of two (the plaster guy said I may have an underground pipe that collapses when I do this...I will be getting my pool pressure tested for leaks in the next 3 weeks).
So my questions are: what are these hollow spots an indicator of? is this evidence of a serious underground water leak? Should I plaster now instead of next spring?
Thanks in advance for your advice!
I've got a 20K inground gunite freeform pool, which I am told was built in 1996. I've owned it since 2018. It looks like it needs re-plastering and plan to do so next spring. I'm getting a quote of about $13.5k for that.
However, I noticed three things recently. The first is that I noticed that when my son jumped into the pool, he was able to dent a hole in the plaster floor. It's about 2" and is circular (I can't get a good picture of it; a section of plaster was cracked and pushed down into the floor). It's as if there was a hollow spot and he jumped on it, which dented it.
Second, near the second floor drain (which is almost dead center in the pool and pushes water into it), the floor feels hollow. And when I gently tap my foot on the plaster floor near the drain, I can feel the vibrations in my other foot...almost like there is water/air underneath the plaster. The "hole" is about 6 feet from the floor drain - they are not really close to each other.
Third, I think I can feel more "hollow bubble" spots around the shallow portion of my pool, near the floor edges and stairs (as if I could stomp on them and cause a similar dent like my son did).
I am not losing water that I am aware of. But I am sucking air into the pump when I change the jandy valve to pull water from one skimmer instead of two (the plaster guy said I may have an underground pipe that collapses when I do this...I will be getting my pool pressure tested for leaks in the next 3 weeks).
So my questions are: what are these hollow spots an indicator of? is this evidence of a serious underground water leak? Should I plaster now instead of next spring?
Thanks in advance for your advice!
