Replaster, how many layers are OK?

tolian21

Active member
Mar 27, 2019
27
NJ
Hi,

I had my pool replastered. The new coat went on top of two existing coats. The contractor cut under tiles and pipe fittings, applied bond coat and then new plaster on top. He said he checked all existing plaster and it was in good shape (no delimitation/hollow).
I read conflicting opinions, some say that two existing layers is too much, and full chip out would significantly increase the cost and potentially a risk of damaging gunnite
 

Geebot

Well-known member
Aug 19, 2013
895
The bigger concern would be the integrity of the layers below. It seems like you're inviting the risk of delamination. When we redid our plaster a few years ago we had the old surface sandblasted off to the raw gunite. The advantages were that we were able to visually inspect the 40+ year old structure (looked like new) and knew that we were starting with a clean slate. The sandblasting added $1,500 to the overall cost but was well worth it.
 

tolian21

Active member
Mar 27, 2019
27
NJ
The bigger concern would be the integrity of the layers below. It seems like you're inviting the risk of delamination. When we redid our plaster a few years ago we had the old surface sandblasted off to the raw gunite. The advantages were that we were able to visually inspect the 40+ year old structure (looked like new) and knew that we were starting with a clean slate. The sandblasting added $1,500 to the overall cost but was well worth it.
Yeah, unfortunately I made a mistake without clarifying this first before signing a contract. I also read that it seems regional, and in some northeast areas like NJ dont want to do it. The contractor is from well established pool company and said he did number of pools with two layers with no issues. I am sure if he wanted to profit, he would advise me to do it.

The prices here are crazy expensive for pools. I am sure it would be a lot of money to add complete chip out.
 

Geebot

Well-known member
Aug 19, 2013
895
Yeah, unfortunately I made a mistake without clarifying this first before signing a contract. I also read that it seems regional, and in some northeast areas like NJ dont want to do it. The contractor is from well established pool company and said he did number of pools with two layers with no issues. I am sure if he wanted to profit, he would advise me to do it.

The prices here are crazy expensive for pools. I am sure it would be a lot of money to add complete chip out.
As noted, our sandblast was fairly priced (took about 4 hours and left a spotlessly clean gunite shell). A chip out would likely be as or more expensive depending on the labor involved.
 

tolian21

Active member
Mar 27, 2019
27
NJ
As noted, our sandblast was fairly priced (took about 4 hours and left a spotlessly clean gunite shell). A chip out would likely be as or more expensive depending on the labor involved.
As noted, our sandblast was fairly priced (took about 4 hours and left a spotlessly clean gunite shell). A chip out would likely be as or more expensive depending on the labor involved.
unfortunately here prices are expensive, it cost me $14K for 25g pool to put polished stones capes.
 

tolian21

Active member
Mar 27, 2019
27
NJ
.. and that's without chipout, I got 3 layers now! to be honest, existing layer was good and solid, it just got stained and pitted in number of places and we got tired of how it looks and wanted fresh look and color. Its not like I waited until it became un-usable, so I am really hoping there are no issues with 3 layers. The contractor said they checked for hollow spots everywhere, and found nothing. keeping my fingers crossed. The new finish looks beautiful.