Big chunk of fell of plaster/gunite fell off

coilerman

Bronze Supporter
Sep 29, 2008
155
Toronto, Ontario, Canada
Forgive me if I'm using the wrong terminology but over the winter, a chunk of the gunite layer on my spillover pool fell off. You can see it laying there under the gap.

Any advice on how to repair? I was thinking of using epoxy to re-attach the broken off pieces and then grouting any remaining gaps. If that's a reasonable course of action, what sort of grout would I use?

If I call in a pro, can they just patch the damaged area? Thanks.

plaster (2).jpg
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
16,299
Northern NJ
You have delamination of the plaster from the gunite shell. You are not going to glue that piece back.

You or a contractor can chip out any other loose plaster around the area, then prepare the gunite with a bonding coat, and put a plaster patch down. The color is not going to match. See...

 

JamesW

TFP Expert
Mar 2, 2011
18,510
What's the history of the plaster?

Has the pool been replastered?

It looks like the plaster did not get a good bond.

If the plaster was left dry, the heating and cooling would cause expansion and contraction, which can cause bond failure.

I suspect that the whole area is unbonded.

Tap on the plaster with the plastic handle of a screwdriver to see if it sounds hollow.
 

coilerman

Bronze Supporter
Sep 29, 2008
155
Toronto, Ontario, Canada
That's original plaster from 15 years ago. It's never been replasterered. Is that something you're supposed to do?

That part of the plaster that broke off was under the winter level of water. I'll give it a tap to check out the surrounding area.

I don't mind if a patch doesn't match. It's underwater and hardly visible.
 

tstex

Silver Supporter
Aug 28, 2012
1,778
Houston, TX
You might want to get a reputable professional to give you an option if the patching will be a continuous project? if the bond is bad, it all needs to be redone...
 

tstex

Silver Supporter
Aug 28, 2012
1,778
Houston, TX
A great original plaster job and excellent chemistries can put a plaster job to 25 yrs; just the opposite could last 3-4 yrs...hard to tell w out good data