Horizontal bondbeam crack at tile above water line repair.

jjmosc

Member
May 12, 2022
19
Philadelphia
Pool Size
28000
Surface
Plaster
Chlorine
Liquid Chlorine
Hello all,
I have a 23yr old 20' x 40' oval plaster that is due for a renovation. With 2 in college I'm trying to kick this can down the road for a couple of years. The pool has held up well over the years and I am not the original owner. After a few seasons of a few loose and some tiles coming off I found the expansion joint had failed. I replaced it and caulked it nicely. I have 2 sections that have loose tiles and apparent minor bondbeam horizontal cracks above the waterline. Right now I have a section about 8' with the tile off and started removing loose material. It looks like the beam cracked length wise and the upper half moved outward towards the deck. A clear void is visible between the coping and the beam and several red brick coping is hollow underneath. My plan for a temporary repair is to pack the void as best as possible with hydraulic cement then use the same cement to even the upper section of beam with the lower section then reset the tiles. The question is how much of the the old brown coat do I remove and how much effort to repair the crack? Do I need to grind down to the shotcrete even anything loose was grinded off and since we have no leaks do I need to cut a V and epoxy the crack? Will post pics tomorrow. Any advice appreciated, thanks.
 

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Your plan to temporarily repair the cracks in the bond beam sound reasonable, grinding down to the Shotcrete and cutting a V grove will better insure a longer lasting bond. You will already have time invested in the project so just a little more work will be beneficial in the end.
 
Thanks for the advice. Much appreciated. Maybe you can answer one more question for me. The gap between the coping and beam is very narrow and several coping bricks are hollow. Trying to get cement in there looks next to impossible. Would a polyurethane expanding foam help at all or just leave until reno time?
 

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I think the foam might expand and pop the bricks off. You could try pumping some Vulkem 116 or other sealant in there to help seal it up and keep it in place. Probably better than nothing and not a lot of extra work.
I afraid of the expansion so that's why I put it up as a question. I'm just looking to fill the void so either I take a shot with expansion or leave it hollow. I will use some type of urethane caulk for a final seal between the coping and tile.
 
I afraid of the expansion so that's why I put it up as a question. I'm just looking to fill the void so either I take a shot with expansion or leave it hollow. I will use some type of urethane caulk for a final seal between the coping and tile.
Take a picture showing the width of the expansion joint. That’ll maybe reveal why the bond beam broke.
 
Here are some additional pics. Thanks for looking.
 

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Update: Over the weekend I tried Great Stuff pond and stone foam spray between the coping and the beam and it did a fairly decent job filling up some voids where the coping was hollow. Don't get me wrong, this is not a long term solution but I'm optimistic it's better than nothing and will help bye me some time before a complete reno. Anyone have thoughts about grout. I am considering trying the epoxy grout. Anybody have any experience with it?
 
Quick update, Project turned out better than I expected. I used Starlike EVO epoxy grout and it's easy to use and a great product. A big thanks to everyone who offered advice and with some skill and great people helping anyone can make a quality repair. Thanks again TFP
 

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