Build in progress - question on drilling holes in gunite

Schrodes

New member
Apr 4, 2021
2
GP Michigan
6080ED14-4687-4DDA-9326-39F633C73266.jpegHi all! First post and I want to say I love this group. I have found so much valuable info here, thankful for you!
This flood happened yesterday and I’m wondering if I have anything to worry about. The PB came out at this point in photo and drilled holes in the bottom (gunite, no finish yet) to relieve pressure - our soil underneath is about 90% clay. They also pumped all surrounding water into pool. It looks great today, water all in pool. Has anyone gone through anything similar? Any potential issues down the road with drilling holes at the bottom?
Thank you kindly!6080ED14-4687-4DDA-9326-39F633C73266.jpeg
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
29,665
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
Welcome to TFP.

There is no problem with the holes your PB drilled. Right before plastering he should fill them with hydraulic cement.

Now that you know you have high ground water, do you have hydrostatic relief valves in the floor of your pool? If not then discuss it with your PB. A hydrostatic relief valve is often installed with a main drain. The valve lets ground water into the pool if the ground water pressure is greater then the pool water pressure. That is preferable to having the ground water pop up the pool.
 

Schrodes

New member
Apr 4, 2021
2
GP Michigan
Welcome to TFP.

There is no problem with the holes your PB drilled. Right before plastering he should fill them with hydraulic cement.

Now that you know you have high ground water, do you have hydrostatic relief valves in the floor of your pool? If not then discuss it with your PB. A hydrostatic relief valve is often installed with a main drain. The valve lets ground water into the pool if the ground water pressure is greater then the pool water pressure. That is preferable to having the ground water pop up the pool.
Thank you so much, AJW! This is incredible information. I will check on the hydrostatic relief valves and hydraulic cement. Appreciate you!
 
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