​

1. The layer of pebblecrete that was applied to your pool when it was first built was too thin, this usually occurs over the edge of stairs in the pool. Pebblecrete that is applied to the wall is usually 7-10mm thick. When the surface applicators apply it up and over the stair edge the thickness drops leaving a very thin layer on the stair edge which can eventually crack after being exposed to chemicals and foot traffic.

2. On the day the pebblecrete was applied to the pool concrete shell the temperature of the day may have been too hot causing the concrete mix to dry out too quickly forming a hairline crack. It is always advisable to apply any pool surface first thing in the morning or late in the afternoon when temperatures are lower to allow for proper curing without rapid dry out of the aggregate mix.

3. The pebblecrete mix was made too bony. A bony mix is when there is too much pebbles and not enough concrete to bind the mix together. A bony mix is very weak and can be brittle. Consisting mainly of pebbles not concrete.

4. The pool water pH was not kept in check. If the pool water pH falls low (becomes acidic) over an extended period of time the water becomes corrosive and the end result is the concrete that binds the pebblecrete together is eaten away resulting in worn patches and cracks.

5. An air bubble was in the pebblecrete mix when it was first applied to the pool. You may first notice this as a spot or line of white calcium. The calcium is being drawn out by the water in your pool from the concrete shell behind the pebblecrete. Over time water builds up between the pool shell and the layer of pebblecrete causing delamination to occur. Delamination is when the pebblecrete comes away from the concrete pool wall.

6. The pool was left empty without water in it for an extended period of time, the pebblecrete expanded and contracted with the heat of the day causing it to crack and delaminate.

7. General wear and tear. Over the years of owning a pool the pebblecrete is exposed to corrosive chemicals, pool cleaners and foot traffic wearing it down to the concrete shell or cracking.

​

It’s always better to get onto pool repairs sooner rather than later otherwise more damage could occur to your concrete pool such as concrete cancer or delamination. We also supply repair kits if you would like to try one of our DIY Pebblecrete Repair Kits.

​

 

For a Free Quotation and Guaranteed Fast Friendly Service Call 0400 310 498