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thoroseal bond beam question

16 years ago

Friday was shotcrete day and on the advice of my plaster contractor I had the shotcrete crew carefully level the bond beam using a lazer level. I want to set my concrete cantilevered coping blocks using thinset--that way no mortar joint to crack. I'm not using waterline tile. Yes I know, the pebbletec/plaster will look funny out of water and will be hard to clean, etc., but I can live with that. And besides we dislike the look and expense of tile. I have a couple of questions:

Should I coat the top and sides of the bond beam with thoroseal to just below the water line before setting the coping? And how soon can I set my coping blocks? The shotcrete guy seemed to think a week of curing would be fine. This is a narrow rectangular lap pool and when I get a breathing space, I'll post some pictures.

Thanks for the help.

Waterouzel

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Comments (3)

golfgeek
16 years ago
waterouzel,
You will need to seal the skimmer opening and make sure there are no voids around the throat.
You should use a mortar bed for the coping stone so you can make sure it is level. Thinset doesn't work well for this type of application. Use a mastic behind any portion of the stone where you pour concrete to the back of the stone. If you get a good bond between the beam and the coping you should have no problems with the pebbletec. Good luck.
waterouzel
Original Author
16 years ago
Golfgeek, thanks for the response. I do have a small void where the shotcrete meets the skimmer throat. Any recommendations for repairing it?

After taking a close look at my bond beam I think it will be difficult to level my coping blocks with thinset. I'm strongly inclined to take your advice and use a mortar bed. Do you suggest any additive to the mortar or just the standard mix for this application? It will be a swg pool.
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golfgeek
16 years ago
waterouzel,
Use the standard mix. You can use this for the patch also.
I've never had a mortar problem due to swg. If that's a concern in your area you could substitute Type V cement for the standard Type II. Good luck.

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