Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 10 of 10

Thread: Repairing underwater cracks in Gunite with Epoxy Putty

  1. Back To Top    #1

    Repairing underwater cracks in Gunite with Epoxy Putty

    Hi All,

    Long time reader, first time poster. I purchased a house with a gunite pool a few months ago, and the pool started to develop cracks and leak at a pretty rapid rate. I called a leak detection service and they came out and verified that my plumbing was fine and the crack was indeed the source of the leak. They patched the crack underwater with epoxy and said that should hold for 6-8 months depending, but that it will always begin to leak again eventually.

    The pool has started to leak again, and this time I've noticed a new crack, and am attempting to patch it myself with JB Water Weld (http://www.jbweld.com/product/j-b-waterweld/)

    Has anyone had success repairing cracks like this? I don't mind continuous temporary solutions, I think eventually the whole pool is going to need replaced. I just want to get though one or two swim seasons before I have to do that!!!!
    15.7K, IG Sunstone Pearl, 2 - Skimmers, 6-Returns, 2HP Jandy Stealth Pump, 580 SF Cartridge Filter, Jandy Aquapure 1400 SWG, Polaris 280, Jandy Aqualink PDA, Del Ozone EC-2, 10' Diameter Sunken Swim Up Bar With Palapa (built in Kegerator set at 27[sup:2nfw1tdl]o[/sup:2nfw1tdl]), 2 - Jandy LED Lights, Weeping wall with 5 returns, Bubbler in Tanning Ledge

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Repairing underwater cracks in Gunite with Epoxy Putty

    Welcome to TFP!

    When you have active movement of the pool shell like that, where cracks are developing and widening over time, no patch technique is going to work for long. The pool shell, and possibly the surrounding soil needs to be stabilized and made rigid again before you will be able to make any real progress.

    If you want to go for temporary solutions, there are several brands of epoxy putty, including WaterWeld, that will work. Keep in mind that temporary measures like those make true repairs a little more difficult, as most of the putty would have to be removed before a permanent repair could be completed.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    In the Industry
    Pool Clown's Avatar
    Join Date
    Sep 2008
    Location
    Silicon Valley, CA
    Posts
    1,636

    Re: Repairing underwater cracks in Gunite with Epoxy Putty

    We have had luck with epoxy injection. You will have to drain the pool and have it done. It isn't a DIY job as there is the injector which generates the force to, well, inject the epoxy.
    Factory Warranty Station for:
    Jandy/Zodiac, Pentair, Sta-Rite, Raypak, Polaris,
    and Paramount pool cleaning systems.

  4. Back To Top    #4

    Re: Repairing underwater cracks in Gunite with Epoxy Putty

    Thanks for the replies, guys. My patching job yesterday seems to have worked for now, which makes me very happy, but I know eventually it will come back. It's been an abnormally cold March here in FL and it was tough to get in there to do it!

    Pool Clown, would you mind giving details about how much the epoxy injection was for you and how big your cracks were?

    On one side of my pool I have a 38' long crack, and the guy said to repair it they would cut it out and (I think) replace it with new cement and then inject it with something, and for a crack that big it would be about $5k. AND if the pool continues to settle it might just come back and crack somewhere else. If I'm gonna spend that much I might as well go all the way and drop a new shell in or something. That's why I'm just puttying it for now, and waiting to see what happens before diving into any major repairs.
    15.7K, IG Sunstone Pearl, 2 - Skimmers, 6-Returns, 2HP Jandy Stealth Pump, 580 SF Cartridge Filter, Jandy Aquapure 1400 SWG, Polaris 280, Jandy Aqualink PDA, Del Ozone EC-2, 10' Diameter Sunken Swim Up Bar With Palapa (built in Kegerator set at 27[sup:2nfw1tdl]o[/sup:2nfw1tdl]), 2 - Jandy LED Lights, Weeping wall with 5 returns, Bubbler in Tanning Ledge

  5. Back To Top    #5

    In the Industry
    Pool Clown's Avatar
    Join Date
    Sep 2008
    Location
    Silicon Valley, CA
    Posts
    1,636

    Re: Repairing underwater cracks in Gunite with Epoxy Putty

    sounds like epoxy injection. Ask him some questions about what he wants to do. What he will use, material to inject, pressures, that sort of thing. We have had anywhere from hairline to 3/8" cracks repaired.
    Factory Warranty Station for:
    Jandy/Zodiac, Pentair, Sta-Rite, Raypak, Polaris,
    and Paramount pool cleaning systems.

  6. Back To Top    #6

    In the Industry

    Join Date
    Nov 2011
    Location
    Moberly,MO
    Posts
    978

    Re: Repairing underwater cracks in Gunite with Epoxy Putty

    Look into www.ecosmartepoxysystems.com this is a way to permanently fix you existing shell. It is pricey but might be affordable for you.
    Over 30 years in the pool business
    We build vinyl, fiberglass, stainless steel pools
    Certified in Hydraulics

  7. Back To Top    #7

    Re: Repairing underwater cracks in Gunite with Epoxy Putty

    My cracks are hairline....for now
    15.7K, IG Sunstone Pearl, 2 - Skimmers, 6-Returns, 2HP Jandy Stealth Pump, 580 SF Cartridge Filter, Jandy Aquapure 1400 SWG, Polaris 280, Jandy Aqualink PDA, Del Ozone EC-2, 10' Diameter Sunken Swim Up Bar With Palapa (built in Kegerator set at 27[sup:2nfw1tdl]o[/sup:2nfw1tdl]), 2 - Jandy LED Lights, Weeping wall with 5 returns, Bubbler in Tanning Ledge

  8. Back To Top    #8

    Re: Repairing underwater cracks in Gunite with Epoxy Putty

    Wow! swimcmp, that looks promising... if my pool can survive until next winter I may dig into that some more...
    15.7K, IG Sunstone Pearl, 2 - Skimmers, 6-Returns, 2HP Jandy Stealth Pump, 580 SF Cartridge Filter, Jandy Aquapure 1400 SWG, Polaris 280, Jandy Aqualink PDA, Del Ozone EC-2, 10' Diameter Sunken Swim Up Bar With Palapa (built in Kegerator set at 27[sup:2nfw1tdl]o[/sup:2nfw1tdl]), 2 - Jandy LED Lights, Weeping wall with 5 returns, Bubbler in Tanning Ledge

  9. Back To Top    #9

    Re: Repairing underwater cracks in Gunite with Epoxy Putty

    I don't know if this is properly considered to be a repair or may be considered a bad idea fofr that matter, but our poop as I understand it was a gunite pool that was covered with a vinyl liner. This was done before we bought the place so I do not know all the particulars plus I imagine advances have been made in repair technology since then too.

    While not by any means a "permanent" solution, it is an option.
    East Texas Piney Woods
    (more specifically N/E Texas)
    pool data:
    In ground vinyl lined
    23,500
    sand filter

  10. Back To Top    #10

    Re: Repairing underwater cracks in Gunite with Epoxy Putty

    Thanks pogo. I considered that - it seems like a vinyl liner might be a little flexible which seem like it would agree with small amounts of settlement of the concrete shell, but I'm no expert there.

    Update: I have new cracks to patch today and a good deal of water loss. I expect this to be a continuous problem but am not going to let it get me down. Having pool issues, though stressful is a first world problem for sure.
    15.7K, IG Sunstone Pearl, 2 - Skimmers, 6-Returns, 2HP Jandy Stealth Pump, 580 SF Cartridge Filter, Jandy Aquapure 1400 SWG, Polaris 280, Jandy Aqualink PDA, Del Ozone EC-2, 10' Diameter Sunken Swim Up Bar With Palapa (built in Kegerator set at 27[sup:2nfw1tdl]o[/sup:2nfw1tdl]), 2 - Jandy LED Lights, Weeping wall with 5 returns, Bubbler in Tanning Ledge

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •