Deck drainage issue suggestions

[offtheclock]

Well getting new liner installed, wall foam, floor repaired and water behind liner issues fixed. PB is going to look at concrete drainage and or sealing liner track. Also having a EasyTouch and screen logic installed.

Also what is best solution to fix floor soft spots and pot marks? Will they should use vermiculite again or something else to fill and smooth out?

 

[Bill1974]

Did you figure out how water is getting behind the liner? Or what is the builder's plan for fixing it?

Hindsight would stay put a drain in the concrete slab under the pavers and have the slab pitched toward the drain and away from the pool. To do that for your pool patio is a fair bit of work.

Is the new liner because of the floor? Hard to tell from the photo, but the floor looks normalish to me (looks better than mine). Mine is sand it's not smooth or level, I probably have an inch or more variation in my shallow end. But you can only notice it if you are looking for it. Even with the light on at night it's very apparant. I would guess concrete or vermiculite you could get smooth. To get sand smooth would take a few rounds of compacting and leveling.

 

[Casey]

My expansion joints on my fiberglass pool allow worms and debris to get into my pool. When it rains hard, I get hundreds of worms and dirt that enter. I think your water is coming from the horizontal expansion joints and maybe the patio. If they'd of put a sump pit between the patio and the pool, I don't think you'd be dealing with all that constant water. There is no where for it to go during a heavy down pour except behind the liner. I believe it's ground water. The slopes between the patio and the pool meet and it's got to go somewhere. It seems that the water isn't running off fast enough. I mean... I could be wrong but if you had a sump pit in that area, it couldn't hurt. I think you'd be surprised at how much water is collecting from the patio and pool. As far as the water collecting behind the deeper end wall... you said the pool level is off. Water travels the least resistance. Maybe you can pull several of those patio pavers and have a sump pit installed there so you can pump it out before it gets behind that wall.

 

[Casey]

One more video before I put cover on.

The video I'm referring to. Pull the pavers up where it meets the concrete and dig a hole. I wouldn't be surprised if you hit water. Get yourself a 10-12" pipe and set it with stone about 6-7' deep. I believe, with seeing your slope on the actual pool deck that your pool builder missed the mark. He didn't acct for the ground water that is coming from the sitting area up against the pool. He only addressed the drainage on the retaining wall.

 

[Casey]

You can lift the patio stone here in red or (I just saw this) dig on the left hand side on the outside wall near the pool deck to add the sump pit.

 

[offtheclock]

Did you figure out how water is getting behind the liner? Or what is the builder's plan for fixing it?

Hindsight would stay put a drain in the concrete slab under the pavers and have the slab pitched toward the drain and away from the pool. To do that for your pool patio is a fair bit of work.

Is the new liner because of the floor? Hard to tell from the photo, but the floor looks normalish to me (looks better than mine). Mine is sand it's not smooth or level, I probably have an inch or more variation in my shallow end. But you can only notice it if you are looking for it. Even with the light on at night it's very apparant. I would guess concrete or vermiculite you could get smooth. To get sand smooth would take a few rounds of compacting and leveling.

PB mentioned looking at concrete and/or sealing liner track. I am happy with either solution as long as it prevents water getting behind liner and not causing too much disruption like redoing slab.

Doing to the new liner because the wall foam wrinkled, the floor as a large soft spot area with a bowling ball size indention right next to the last stair and there are 4-5 divots I would like to fix. Also eliminating top boarder as I hope to minimize visual effect of the slightly deeper side on the skimmer where pool is off by 1”.

 

[offtheclock]

My expansion joints on my fiberglass pool allow worms and debris to get into my pool. When it rains hard, I get hundreds of worms and dirt that enter. I think your water is coming from the horizontal expansion joints and maybe the patio. If they'd of put a sump pit between the patio and the pool, I don't think you'd be dealing with all that constant water. There is no where for it to go during a heavy down pour except behind the liner. I believe it's ground water. The slopes between the patio and the pool meet and it's got to go somewhere. It seems that the water isn't running off fast enough. I mean... I could be wrong but if you had a sump pit in that area, it couldn't hurt. I think you'd be surprised at how much water is collecting from the patio and pool. As far as the water collecting behind the deeper end wall... you said the pool level is off. Water travels the least resistance. Maybe you can pull several of those patio pavers and have a sump pit installed there so you can pump it out before it gets behind that wall.

The patio and the pool deck all have a slope towards the pool. When raining hard the water does run off the patio in a couple different directions. One of them towards the pool deck. Patio size is roughly 20x20. also patio is behind walk out basement. I really do not think it’s ground water as this issue can occur with moderate rain after weeks of a dry spell. All my gutters are ran around out and around the pool so the only area is the small patio.

 

[offtheclock]

The video I'm referring to. Pull the pavers up where it meets the concrete and dig a hole. I wouldn't be surprised if you hit water. Get yourself a 10-12" pipe and set it with stone about 6-7' deep. I believe, with seeing your slope on the actual pool deck that your pool builder missed the mark. He didn't acct for the ground water that is coming from the sitting area up against the pool. He only addressed the drainage on the retaining wall.

Found this pic. Patio is built on a compacted crushed stone base. Almost like concrete. I asked before about ground water and PB did not think it was but I will bring it up again.

 

[offtheclock]

Pool update. New wall foam, liner and floor repaired there was some rust but most is dirty water. Note the area of the floor that is wet by the stairs. The darker areas were where my floor was soft. Please watch my video for better explanation:

 

[Newdude]

Looking GOOD !!!

If changing the patio sand was to affect anything, it would be less ground water not more. I experimented with the polymeric when they did my patio and put some in a cup. Water turned it into a hockey puck somewhere between rubber and cement. It won't let water through it, and you'd be flooding over the top.

How old was the patio sand ? After a couple of years it was probably gummed up with dust and debris and pretty impervious also. I'd wager it was a neutral swap that cancelled itself out of the equation.

The pop up by the stairs could totally be saturationg the area above the pool, and the water flowing downhill below grade to the pool area where it breaks through behind the liner. A root system, a mole tunnel, looser soil around sprinkler lines, or 100 different ways it could get from A to B.

I'd reroute the pop up further down past the pool ASAP.

 

[offtheclock]

Looking GOOD !!!

If changing the patio sand was to affect anything, it would be less ground water not more. I experimented with the polymeric when they did my patio and put some in a cup. Water turned it into a hockey puck somewhere between rubber and cement. It won't let water through it, and you'd be flooding over the top.

How old was the patio sand ? After a couple of years it was probably gummed up with dust and debris and pretty impervious also. I'd wager it was a neutral swap that cancelled itself out of the equation.

The pop up by the stairs could totally be saturationg the area above the pool, and the water flowing downhill below grade to the pool area where it breaks through behind the liner. A root system, a mole tunnel, looser soil around sprinkler lines, or 100 different ways it could get from A to B.

I'd reroute the pop up further down past the pool ASAP.

The patio is around 5 years old and was only paver sand. The pop up by the stairs is new with in the last week. They installed it with the catch basin by the new stone steps to keep water from running down the hill. prior to the water ran from down the drive way and then down the hill. Also had the water run off from neighbors house as well.

I’m wondering if the water shedding off the pool deck by the chairs and into the border between the deck and wall is over running the drainage and that’s what’s keeping the shallow area floor wet or if the shallow area floor being wet is from the wall water just draining down there because of the least resistance.

Also this issue would happen with no rain for weeks and then just getting even a little bit of rain.

 

[Newdude]

The pop up by the stairs is new with in the last week. They installed it with the catch basin by the new stone steps to keep water from running down the hill.

OK I misheard that part in the video then. Here's to hoping it helps.

How high does the hill go ? Across the street or across the neighborhood ?

Also this issue would happen with no rain for weeks and then just getting even a little bit of rain.

Maybe sprinklers, or sprinklers at properties further uphill (if applicable) ?

 

[offtheclock]

The patio is around 5 years old and was only paver sand. The pop up by the stairs is new with in the last week. They installed it with the catch basin by the new stone steps to keep water from running down the hill. prior to the water ran from down the drive way and then down the hill. Also had the water run off from neighbors house as well.

I’m wondering if the water shedding off the pool deck by the chairs and into the border between the deck and wall is over running the drainage and that’s what’s keeping the shallow area floor wet or if the shallow area floor being wet is from the wall water just draining down there because of the least resistance.

OK I misheard that part in the video then. Here's to hoping it helps.

How high does the hill go ? Across the street or across the neighborhood ?

Maybe sprinklers, or sprinklers at properties further uphill (if applicable) ?

My front yard levels out and then across the street there is another hill with houses. Their houses have for yards that look like my back yard.

 

[Newdude]

Well it's not coming from downhill, so.

But yeah. Anywhere above pool grade could be resurfacing again at the pool.

 

[offtheclock]

Any thoughts on the built up white soft chalk like substances that was caking up behind the liner?

 

[Bill1974]

Good to hear that it looks like things better and hopefully solved. Any one or all those changes could have been reason for the improvement. Hopefully it solved or if it comes back it significantly smaller.

I'm guessing the white paste behind the liner was efflorescence from the concrete. I have a good bit of it on a retaining wall around my pool from the concrete slab under the pavers. Was it noticable through the liner visually or just showed as wrinkle. I have one area where I get water behind the liner after heavy rains from water coming off a gazebo. Mine goes away in a day or two and is only a foot long section puffed out a 1/4" or so.

 

[offtheclock]

We have received an additional inch of rain today and so far so good. Very happy. Do you think that my floor will stay dry now and not get soft? Or could that be a separate issue?

 

[Newdude]

Do you think that my floor will stay dry now and not get soft? Or could that be a separate issue?

I'm thinking the drainage issue had an awful lot to do with it.

 

[offtheclock]

Total of three inches of rain and no water behind the liner! I am convinced this is resolved!