Rough Plaster in New Pool

chrisclark

New member
Jun 24, 2022
3
Northwest Florida
Hello,

My new gunite/plaster pool was completed and filled about 30 days ago. I first started to use it about 2.5 weeks in and noticed some of the plaster is extremely rough and abrasive, particularly on the vertical walls of the benches/ledges. We’re talking rough enough to scrape and cut bare skin. The floors and horizontal surfaces feel pretty typical—certainly much smoother than the walls.

At startup, the contractor treated the pool with an initial round of chemicals and then I followed all of the contractor’s instructions from startup until now: running the pump around the clock for the first two weeks, brushing all plaster surfaces twice a day for the first two weeks and using muriatic acid every few days to bring the pH down to the desired range (7.2-7.8). (The pH had a tendency to creep back into the 8.0+ range between treatments but all of the professionals I spoke with told me that’s to be expected for the first few months with new plaster.) I’m still brushing the pool at least every other day and the pool is now being professionally maintained (trial service provided by the contractor). Salt was not added until today (30+ days after plaster).

Is this a craftsmanship problem with the plaster or something else?
 
Welcome to TFP.
Can you provide the type of plaster that was applied.
Some new plaster can be rough, some complain of rubbing the skin off of their toes.
Have you discussed it with the PB or the company that applied the plaster?
Please see the article
I'm not sure about the specific type, but what I can tell you is that it's not PebbleTec. We used Blue Haven's standard plaster finish. Let me know if you'd like any more specifics or details.
 
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The pool walls can be sanded to smooth it out. Either by hand with 80/100 grit wet/dry sandpaper or powered sanders with diamond pads.

Don’t let them acid wash the pool to try and satisfy you. It will etch the plaster and reduce its thickness.

Take some sandpaper and sand an area of roughness and see what it takes to smooth it out.
 
@ajw22 Can the sandpaper method be used while the pool is still full?

@HermanTX I forgot to mention that I did notify the pool contractor about this potential warranty issue today. Until today, I thought perhaps it was simply a new plaster issue that would work itself out with continued curing, brushing and balancing, but the service tech who was out today felt it, too, and said it's abnormally rough.
 
@ajw22 Can the sandpaper method be used while the pool is still full?

@HermanTX I forgot to mention that I did notify the pool contractor about this potential warranty issue today. Until today, I thought perhaps it was simply a new plaster issue that would work itself out with continued curing, brushing and balancing, but the service tech who was out today felt it, too, and said it's abnormally rough.
Yes you can use sandpaper while the pool is full. Try an area that is rough and use circular motion to sand it down.
 
This is a diamond pad sold by NPT, I supply one to every customer so if they find a rough spot on the plaster surface it can easily be removed.
 

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This is a diamond pad sold by NPT, I supply one to every customer so if they find a rough spot on the plaster surface it can easily be removed.
Now, that's something I didn't know existed available at the DIY level for touch-up areas. I guess if you had some mixed in glass beads and abalone it would not be advised?
 
Now, that's something I didn't know existed available at the DIY level for touch-up areas. I guess if you had some mixed in glass beads and abalone it would not be advised?
I have that in my Wet Edge Primera plaster - they actually used hydraulic sanders on mine because that is part of the process. They left me a couple of pads to use for any future need.
 

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