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Thread: Pool Liner is a little loose in the corners of a 90 degree radius pool....any advice?

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    Pool Liner is a little loose in the corners of a 90 degree radius pool....any advice?

    Folks, I just finally got my new pool installed last week and I noticed something minor that the pool builder told me not to worry about but I worry about things.....

    I have a 14x26 90degree radius rectangle pool and in the shallow end I have 3 steel entry steps running across the entire shallow end of the pool like a roman bath house style pool.

    The liner is installed over these steps and I notice that in the top step corners, on both sides, the liner doesnt tightly fit snug into the corners...theres a little sag (altho, the liner is aligned with the track fine, it just appears that the liner may be slightly overcut to accomadate some shrinkage in the future. (At least thats what the pool builder said. He said dont worry because the liner will shrink in the colder climate(i'm in the NJ area) and he said when it shrinks a bit, it will form to fit fine over time.

    I also noticed in the deep end that the corners arent actually tucked into the 90 degree corners, theres a little bow on both sides near the top....what I mean is that if you press your finger into the corner, theres a tight tenstion on the liner and there is a pocket of air maybe less than an inch that stretches across the corner in a curve. He also said this is normal and you will never get the liner to crease completely into the entire corners....There will always be a small pocket of sweep across the the 90 degree corners near the top. I hope I can trust him, but more importantly, I hope this doesnt introduce any risks

    What are your thoughts?
    Design 14x26 (10,000 gal) in ground vinyl pool, 2 Wide Mouth Skimmers, 3 Returns
    Equip 3.0 HP Pentair VS pump motor, 48 FNS Plus DE filter, IC20 SWCG, 400Btu NG Heater
    Extras Easy Touch Automation, Pentair LED Lite, Kreepy Krawl Racer pressure cleaner
    Water pH 7.5, Total Alk 90, Free Cl 4.5, Combine Cl 0.25, CYA 65, CH 275, Salt 4100ppm, Borates (Boric Acid) 50ppm

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    northrn's Avatar
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    May 2014
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    Re: Pool Liner is a little loose in the corners of a 90 degree radius pool....any adv

    My thoughts are if the builder says "it will be fine" then I would like his fine promise in writing and a guarantee that he will fix it at no cost should it ever become not "fine" since I pointed it out to him beforehand.

    And that's a very long sentence with poor structure and I'm sure some grammar and punctuation flaws but I like it.
    27' AG 18K Gallons ~ Cartridge Filter ~ Pentair 1.5 HP Pump

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    Re: Pool Liner is a little loose in the corners of a 90 degree radius pool....any adv

    Thanks for the advice...but before I start attacking my pool builder with statements in writing, I'd like to know if anyone thinks there is any validity to his points about Pool liners eventually shrinking into place over time? I know its hard to make a judgement call without pictures, but this is really just in the corners above the the left and right side top step which may only be an area of 1/2 and inch or so....it just not completely tight and tense. It has a little give...thats about it on the shallow end....

    ..And also the statement about the fact that deep end 90 degree corner radius pools never really have the line creasing fully into the corners near the top?

    He has been a very good builder throughout the process and has been in business over 30 years, I just dont feel comfortable calling him out with asking for certain things in writing until I do a little more poking around on my own. I hope this makes sense. Im a very shy person
    Design 14x26 (10,000 gal) in ground vinyl pool, 2 Wide Mouth Skimmers, 3 Returns
    Equip 3.0 HP Pentair VS pump motor, 48 FNS Plus DE filter, IC20 SWCG, 400Btu NG Heater
    Extras Easy Touch Automation, Pentair LED Lite, Kreepy Krawl Racer pressure cleaner
    Water pH 7.5, Total Alk 90, Free Cl 4.5, Combine Cl 0.25, CYA 65, CH 275, Salt 4100ppm, Borates (Boric Acid) 50ppm

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    In the Industry

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    Re: Pool Liner is a little loose in the corners of a 90 degree radius pool....any adv

    Every liner that I have installed or been called to look at over our 30 plus year history on a square cornered pool does exactly what you describe. We won't build a pool,that way unless that is absolutely the only way. At some point in the future you will have an issue with the square corner and the vinyl.
    Over 30 years in the pool business
    We build vinyl, fiberglass, stainless steel pools
    Certified in Hydraulics

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    North Bergen, NJ
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    Re: Pool Liner is a little loose in the corners of a 90 degree radius pool....any adv

    thanks for your honesty, but your statement really scares me
    Design 14x26 (10,000 gal) in ground vinyl pool, 2 Wide Mouth Skimmers, 3 Returns
    Equip 3.0 HP Pentair VS pump motor, 48 FNS Plus DE filter, IC20 SWCG, 400Btu NG Heater
    Extras Easy Touch Automation, Pentair LED Lite, Kreepy Krawl Racer pressure cleaner
    Water pH 7.5, Total Alk 90, Free Cl 4.5, Combine Cl 0.25, CYA 65, CH 275, Salt 4100ppm, Borates (Boric Acid) 50ppm

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    mickey4paws's Avatar
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    Apr 2009
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    Re: Pool Liner is a little loose in the corners of a 90 degree radius pool....any adv

    My corners are exactly like you describe my liner is now 10 years old and it's been fine I've had no problems with the corners

    IG 12' x 39' - 20k Gallons - Vinyl Lined - StaRite Cristal-Flo II 26" Sand Filter - Hayward SuperPump 1 hp - Dolphin Dynamic autocleaner - Lochinvar Energyrite gas heater - Aqua Rite SWCG T-15 - TF100 Test Kit - Skimlite Duallly 9016 pole (great pole)

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    Hamilton
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    Re: Pool Liner is a little loose in the corners of a 90 degree radius pool....any adv

    Hi there I have the exact same problem in a pool I just had installed and i hate hot sloppy it looks did you ever get the corners fixed at the 90 degree angle in the shallow end at top stair?

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    Jul 2017
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    Southern Indiana
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    28

    Re: Pool Liner is a little loose in the corners of a 90 degree radius pool....any adv

    The OP describes every 6" liner pool in existence. This is why liner pools were traditionally 2' radius at the corners. However, 6" radius has almost become the standard and I'd guess that most people don't have significant issues with the liner at the top of the corners because of it being stretched. The alternative is a saggy, wrinkled liner, so they're designed this way.

    Assuming there isn't something else wrong (we'd need to see pictures to know), then I say no biggie, just go swimming!

    Dan

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