Pool mottling the variations in the color of cement or pool plaster is a common concern among pool owners and pool remodelers alike.
What is mottling of pool plaster.
It is not caused by improper water chemistry.
The pool may need to be left empty a day or 2 to air dry.
Drain and lightly acid wash pool then heat affected areas with a propane torch.
While pool mottling may sound.
In some cases chemical balances may be off when a new pool is.
Follow the magic marcite pool water chemistry letter without fail for the first 12 months of your pool finish life.
There is nothing wrong with your plaster.
First of all you are talking about two absolutely totally 100 different things.
For your pool plaster supplies pour in premixed white portland cement and marble dust.
Ranging from unnoticeable to severe the mottling of pool finishes like quartz and plaster as well as cement decks is unpredictable and can happen to any pool.
But adding calcium chloride cc to a color pigmented plaster can also lead to blotchiness and mottling which pigment manufacturers and the portland cement association pca warn about.
It is normal and unavoidable.
Use the bonding additive to mix the plaster with and wet the area to be patched.
There is also normal mottling of plaster where the white plaster surface has very slight shade differences from one white area to another.
The concrete cement industry has determined that late hard troweling can cause cement concrete white or gray surfaces to darken mottle and become spotted.
Even the cal poly npirc test pool studies on color pigments provided confirming results.
White pool plaster sometimes becomes a mottled gray or grey color either immediately or a few months after the new plaster pool is filled with water.
It is not a defect.
One common cause of plaster deterioration is improper pool water chemistry.
Again this slight difference still has to do with the fact that plaster is made of a mixture of water cement and aggregate and is a hand crafted product.
This should be under warranty and no charge to home owner.
Trowel smooth with a round ended trowel.
What causes that to happen.
Mottling is an inherint characteristic of any colored or even white plaster.
One of several factors may be the culprit.
Discolorations new pool plaster can discolor darken or turn gray from adding excessive calcium chloride set accelerator from late hard troweling from thin and thick areas due to an uneven shell etc.
Out of balance pool water chemistry.
Gray or grey mottled discoloration also known as water entrapment or hydration is difficult to remove may be remedied by.
The only thing.
