Questions on steel wall/vinyl liner pool back fill

[grant0830]

We are about to start our construction for a new inground pool that will have steel walls / vinyl liner.

We plan on doing a 24” poured concrete coping (thoughts/considerations on this vs paver coping??) and have been told different things by landscape contractors in regards to how far we should take the concrete underlay (beyond poured coping) to help prevent against water working its way through aggrate base under pavers to behind the vinyl liner and possibility causing bubbles or other issues.

What is the best practice for steel wall/vinyl liner construction in the Midwest?

thank you!!!

 

[kimkats]

I am sorry you have not received an answer yet. here is a bump to get this in front of more eyes!

 

[ia_soxfan]

Pavers when installed correctly, are somewhere in the vicinity of 97-99% impervious (I forget the exact percentage). I don't think run off is as much of an issue as ground water behind the liner is. We use a 3/4" clean stone (no fines) as backfill behind pools. The first benefit to using 3/4" stone is that the second it's dumped in is about 98% compact, and secondly is free draining. It's also good practice to have a drain tile at the base of the panels ran to daylight if possible.

Paver coping on a concrete collar works fine so long as A) you have 3/4" clean as backfill and B) you have concrete piers (sonotubes) every 3-4' around the pool connecting the coping collar and the concrete beam poured at the bottom of the walls.

 

[jimmythegreek]

Depends if u have high groundwater at times on ur lot. If so u need a perimeter drain to daylight or a well point w a pump and use 3/4 Clean stone. As said compacts great and drains. I see alot of ppl here repeat that but there's a catch. If u have any type of silty soils u need fabric protecting from native soils. What happens after years of water going thru dirt into the stone it brings fines and erodes a little in soil next to atone and it sinks a little bit. Some soil is fine one not so good. Cheap insurance to me. Did a drain on mine and wrapped up tight w septic fabric I'm cut into a hill so I dumped to well points w sump pumps in them no other options I have groundwater galore. Works perfect. It's hard to use road base materials next to pool because u can't run a plate against walls. In that case u plate 2 ft away in lifts then let it sit for months or a freeze thaw cycle and do ur decking. That's the beat way regardless but ppl wanna swim asap so not usually done. Those that wait almost never have a sink or heave issue