Damp spots on spa negative wall

d_red1

Well-known member
Jul 21, 2016
70
Keller, TX
Pool and hot tub was plastered on Sunday (after the rain passed). Finished filling it the same night. Went out to check on things this evening and noticed the negative wall of the raised spa had several damp spots.

The negative wall still needs to be finished as I have yet to install the stacked stone. Inside and outside of the spa was coated with two coats of MasterSeal 581. Damp spots seem to be at the same elevation as the spa jets. When gunite was sprayed they didn't do a good job of getting between the forms and the pipes. After the forms were stripped some of the more problem areas were chipped out in this area and patched with grout.

Is this weeping through from the positive edge? Could a pipe leak at atmospheric pressure cause this many damp spots? Pics were taken on opposite walls so I am leaning away from the pipe leak. What are my options? A third/fourth coat of the MasterSeal on the negative edge? Chip out and re-grout these areas?
 

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d_red1

Well-known member
Jul 21, 2016
70
Keller, TX
This morning brought severe thunderstorms so unable to check it. I did have a look at about 3am this morning when checking on the pool fill and took another pic. I also found some pic's of the gunite job around the pipes. These are the areas that had the loose gunite removed and repaired with grout. That front corner is the worst of the damp spots.
 

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bdavis466

TFP Expert
Platinum Supporter
Aug 4, 2014
5,529
San Clemente, CA
That's an odd way of shooting the spa wall. I don't see how the interior of the spa could have voids though and since it was waterproofed, that seepage shouldn't be happening.

Were the spa returns prepped well and waterproofed around the fittings?
 

d_red1

Well-known member
Jul 21, 2016
70
Keller, TX
Fittings were prepped, at this point and think it is up for debate if it was prepped well. It was waterproofed around the spa pipe stub outs as they are shown in the third pic. The plaster guy put the fittings on the morning of the plaster and filled the remainder of the opening with plaster as he worked on the spa.
 

bdavis466

TFP Expert
Platinum Supporter
Aug 4, 2014
5,529
San Clemente, CA
Fittings were prepped, at this point and think it is up for debate if it was prepped well. It was waterproofed around the spa pipe stub outs as they are shown in the third pic. The plaster guy put the fittings on the morning of the plaster and filled the remainder of the opening with plaster as he worked on the spa.
There's no issue with any of that. What's it look like now?