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Thread: "Fault line" in IG Vinyl Liner Pool

  1. Back To Top    #1

    Join Date
    Jun 2007
    Location
    Philadelphia
    Posts
    32

    "Fault line" in IG Vinyl Liner Pool

    All, hoping to get some suggestions on what is causing this and of course any ideas for correction.

    We had these "fault lines" in our pool, one on the side, the other going from the hopper to the
    bottom on the deep end (bought the house in the winter, when it was closed and covered) since
    we've had it. Around 8 years ago, we replaced the liner with the work done by the original PB. They smoothed this
    out, though I don't recall if they added any sand or not. The "fault" reappeared after a year or two and has gotten
    progressively worse. The edges are rather sharp and and you can see in the photos, I've had to patch it (not all that
    well) a couple times last year.

    With the season and opening rapidly approaching I'm thinking it's time to replace the liner again...and to try to fix the underlying cause once and for all. I've thought about washouts or something like that under the pool but wouldn't have
    any idea how to fix it.

    Thanks for any thoughts and ideas.



    22,000 Gal IG Vinyl
    Sta-rite SD75 DE filter
    Solar Cover

  2. Back To Top    #2

    Join Date
    Mar 2007
    Location
    Coastalish 'down easter'
    Posts
    4,160

    Re: "Fault line" in IG Vinyl Liner Pool

    I'm thinking that the 'fault lines' are being caused by surface water (snow melt and heavy rains). Is the pool on or at the bottom of a hill? You might want to install a curtain drain to divert the water away from the pool.

    Another obvious answer is to vermiculite the floor (sand and cement is also used but it's more abrasive to the liner and water doesn't pass through as well) - however if the problem is surface water, as I suspect, without the curtain drain the cement will wash out of the vermiculite (perhaps in as few as 2 seasons) or the liner may repeatedly float.

    Unfortunately, doing the fix as I suggest will cost $$$$
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

  3. Back To Top    #3

    Join Date
    Jun 2007
    Location
    Philadelphia
    Posts
    32

    Re: "Fault line" in IG Vinyl Liner Pool

    Thanks Ted. Pictures posted...

    In the picture with my shadow on the pool I am looking to the deep end. There is a hill, however, the hill
    really goes up from side of the pool without the problem - the side with the problem is farther away from the
    bottom of the hill, if that makes sense. I'd think if it was surface water the other side of the pool would be affected.
    I run downspouts through 4" flexible pipe (buried) so that it drains away from the pool, so I'm at least trying to divert
    some of the water...

    Somewhat adjacent to the pool is a sand mound with piping. Not sure how to determine if there are problems because of that -
    I'd think I'd see the fault lines along the shallow end as well.

    Assuming I get the liner replaced what should I be looking for when the old one is removed?
    22,000 Gal IG Vinyl
    Sta-rite SD75 DE filter
    Solar Cover

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