Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Liner Thickness

  1. Back To Top    #1

    Join Date
    Feb 2012
    Location
    Maryland
    Posts
    400

    Liner Thickness

    Im researching liners for my upcoming DIY pool. My local pool builder suggests 28 mil wall and a 20 mil bottom. They say the wall should be thick so the stretch is minimal at that point and will not allow the patterns to distort, the thinner bottom allows for it to stretch better into the corners for a smoother bottom finish.

    Is this legit or are they just trying to sell me what they personally sell?
    DIY 18x36 IG Vinyl Rectangle with 2 foot radius; Steel Walls. 8' steps w/t 2 step jets; 2 MD, 1 Skimmer, 2 returns; Hayward Pro Series 24 Inch 300# Sand Pool ; Hayward color logic 4.0 LED light; 2" PVC pipe 4 Jandy Valves, Hayward PL-P-4, SWCG

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

    Re: Liner Thickness

    The liner thickness doesn't make very much of a difference in that range. Thicker walls and thiner floor are considered good things, but really it is such a minor thing that it is unlikely to make any difference. The skill of the installer and how much you like the pattern will both make much more of a difference.
    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

    Re: Liner Thickness

    a 20 mil liner will stretch tremendiously more than a 27 mil will. Especially given the temperature. When it is warmer out and the pool is filled fast, by say a hydrant, the liner will stretch less on the walls to fit floor imperfections. If it is colder out, it is going to pull more from the walls, which results in a stretched tile pattern and just IMO looks really bad. The liner fitment can be off by about an 1" overall and you will not notice any imperfections. Make sure they use atleast two vacuums to get the liner to fit the best the first time around. Many pros can get by with just a single vac depending upon the step configuration. But regarding a liner made out of two different mil thicknesses is not really needed. Just choose either a 20 or 27 mil. 20 Mil does stretch the best for new liners in spring and fall.
    PremierPoolProducts.com
    Premier Pools and Spas | Omaha, NE
    Stanger General Contracting | Omaha, NE
    Swimming Pool Design/Build Specialist | Consultant | Repair | Parts | Service
    Certified Warranty Station for Pentair | Hayward | Zodiac/Jandy | Aquabot | Polaris

  4. Back To Top    #4

    Join Date
    May 2010
    Location
    SW Georgia
    Posts
    298

    Re: Liner Thickness

    The way it was explained to me when I built my pool was that the part of the liner that suffered the most abuse was the part that was out of the water and therefore you would benefit from having a thicker wall than bottom. To the me (first time DIY pool) it made sense so I ordered 30 mil walls and 20 mil bottom. If I remember correctly it did not cost that much extra.
    35K IG Vinyl 20 x 40 self built pool, Hayward Pro Series High-Rate Sand Filter 31" 98gal/min, Hayward TriStar 1.85hp, Hayward 400btu heater, BBB method w/Hypo, Jazz light w/matching fiber optic rope lighting around coping w/syncronized color wheels. Concrete Paver deck.

  5. Back To Top    #5

    Re: Liner Thickness

    Out of the 100s of pools I have built, the parts that are out of water only get ruined from an improperly stretched liner. Or one that is continuing to stretch from some type of settling. The liner that is in the water gets the most abuse. Constant contact with chemicals, vaccuums, and debris... is why they are always more faded and more brittle than the part that is out of the water, when you go to replace the liner.
    PremierPoolProducts.com
    Premier Pools and Spas | Omaha, NE
    Stanger General Contracting | Omaha, NE
    Swimming Pool Design/Build Specialist | Consultant | Repair | Parts | Service
    Certified Warranty Station for Pentair | Hayward | Zodiac/Jandy | Aquabot | Polaris

Posting Permissions

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