Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: Salt Water causing slow deterioration of limestone retaining wall

  1. Back To Top    #1

    Join Date
    May 2013
    Location
    Austin, TX
    Posts
    3

    Salt Water causing slow deterioration of limestone retaining wall

    I have a salt water pool in my backyard and I'm not gonna lie, I love the minimal maintenance and complete lack of algae. Sure I have to pour in acid on a regular basis, but beyond that the pool mostly takes care of itself.

    Downside is my limestone retaining wall (picture below) is starting to really show some wear. There are some stones that have holes in them all the way through. I'm not concerned about structural integrity as the limestone is just a veneer in front of a concrete/cinderblock but I'm curious what my options are. Wall is about 13years old, so this is nothing that has happened rapidly. However I've only been the owner for the past 2 years. So I'm not sure if anything has been done to mitigate this damage. I know I haven't done anything though.

    I'm tempted to just have new limestone put in where stones are worn real bad. There are plenty of places that show no wear though. Then I'll just have to keep doing this every 5-10 years. However I also thought about just replacing the veneer rock with something else or stuccoing the limestone (if that's even possible). It's hard to tell in the pic but this wall is REALLY long. Its about 90ft or so with ~40ft directly in front of the pool. So I'm a little reluctant to throw in the towel on the limestone, but wasn't sure if anybody knew of any options?

    Has anybody else had to deal with this kind of premature stone wear from salt and have any ideas?

    FullSizeRender.jpg

  2. Back To Top    #2

    Join Date
    Aug 2014
    Location
    Austin, TX
    Posts
    74

    Re: Salt Water causing slow deterioration of limestone retaining wall

    In the part of central Texas I live in, our pool builder did not recommend SWCG because of the lime locally quarried and used in so many concrete products plus the limestone we have all around our decks and house. But last year when I was trying to decide, many here talked about using a sealant to protect your rock work. I didn't like that idea since some said the sealant could make the rock slippery when it's wet, so I didn't go with a SWCG. The sealant could work well in your case though with the vertical wall nobody will be walking on.
    12300gal IG PebbleTec w/7' raised Spa & Waterfall. Built Aug 2015
    Pentair IntelliFlo VS Pump, Pentair 420 Cartridge Filter, Ultra UV, Auto Fill
    EasyTouch control w/ Remote, Infloor Cleaner w/1.5HP Pump and Leaf Canister
    Stenner 45MPHP10 w/15gal tank, Rainbow 320 Chlorinator, TF-100 Test Kit.

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Salt Water causing slow deterioration of limestone retaining wall

    Welcome to TFP!!!

    Only took you 3 years to make your first post

    Please add your location (City, State or City, Country) to your profile and pool details to your signature as described HERE as it will help us help you.

    I agree that sealing might help in your case. Maybe others will have a thought.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  4. Back To Top    #4
    Mod Squad Jimrahbe's Avatar
    Join Date
    Jul 2014
    Location
    Bedford, TX
    Posts
    5,318

    Re: Salt Water causing slow deterioration of limestone retaining wall

    My question would be is the salt the problem or just water in general? I know it is not the same, but the Grand Canyon doesn't have salt water yet it has eroded a bunch of rock. I suspect that any water near limestone, for 13 years is going to have some impact.

    Is there a tile line at the water level or is that limestone also?

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Calder Spa.

  5. Back To Top    #5

    Join Date
    May 2013
    Location
    Austin, TX
    Posts
    3

    Re: Salt Water causing slow deterioration of limestone retaining wall

    Quote Originally Posted by jblizzle View Post
    Welcome to TFP!!!

    Only took you 3 years to make your first post

    Please add your location (City, State or City, Country) to your profile and pool details to your signature as described HERE as it will help us help you.

    I agree that sealing might help in your case. Maybe others will have a thought.
    Alright I threw what I could think of in my sig. I'll fill in further details later.
    33k gallon IG pebbletec built 2003
    DE filter, SWG (details coming)

  6. Back To Top    #6

    Join Date
    May 2013
    Location
    Austin, TX
    Posts
    3

    Re: Salt Water causing slow deterioration of limestone retaining wall

    Quote Originally Posted by Jimrahbe View Post
    My question would be is the salt the problem or just water in general? I know it is not the same, but the Grand Canyon doesn't have salt water yet it has eroded a bunch of rock. I suspect that any water near limestone, for 13 years is going to have some impact.

    Is there a tile line at the water level or is that limestone also?

    Jim R.
    I thought the same thing, but all the areas of wear are right up against the pool. They are also mostly centered around the center fountain that is in the pic. The rest of the retaining wall (50ft not behind the pool) is fine. Additionally a lot of the stones up against the pool are fine as well. Oddly enough some of the stones that are in the best shape are directly under the waterfall where they are getting constantly bombarded by splash from the waterfall. If I had to guess, the stones that are the worse are the ones that might get a little bit of splash or water spray from wind/etc, but don't get regularly wet. The stones that are worn down are actually very chalky and are dropping sand/rock dust into my pool.

    My coping is hard tile. It has some damage to it but very minor. I've noticed no increased damage to it while I've owned the pool. I suspect the minor damage/pitting it has is from somebody spilling acid and not cleaning it off rather than damage from salt. I know I've got some acid splash on it myself, but I also make sure to wash it off immediately.
    33k gallon IG pebbletec built 2003
    DE filter, SWG (details coming)

Posting Permissions

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