Plaster question
- Thread starter crosby1612
- Start date
Crosby,
It varies as they use the plaster to cover up any defects in the gunite..
My guess is about 1/2".
Let's ask someone that knows... Calling @JamesW
Thanks,
Jim R.
It varies as they use the plaster to cover up any defects in the gunite..
My guess is about 1/2".
Let's ask someone that knows... Calling @JamesW
Thanks,
Jim R.
Plaster will typically have thickness of 3/8” to 3/4”.
The larger the aggregate, the thicker the plaster.
The larger the aggregate, the thicker the plaster.
Thickness.
The cementitious surface coating should have an average minimum ‘thickness’ of ⅜" and an average maximum thickness of ¾".
Though some fluctuation may exist across the cementitious surface coating, most of the cementitious surface coating thickness should remain within these tolerance levels.
Small areas of highs and lows, spanning no more than several inches in diameter per occurrence, are allowed an additional
tolerance.
This would include the filling of small holes, pits, or dig-outs (indentations around plumbing fixtures or lighting fixtures) in the substrate.
The cementitious surface coating should have an average minimum ‘thickness’ of ⅜" and an average maximum thickness of ¾".
Though some fluctuation may exist across the cementitious surface coating, most of the cementitious surface coating thickness should remain within these tolerance levels.
Small areas of highs and lows, spanning no more than several inches in diameter per occurrence, are allowed an additional
tolerance.
This would include the filling of small holes, pits, or dig-outs (indentations around plumbing fixtures or lighting fixtures) in the substrate.
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Ten Guidelines for Quality Pool Plaster
There are proper steps to follow for the making of durable pool plaster. There are also improper practices that can lead to early deterioration or discoloration. Following is a ten-point checklist that will help achieve a lasting and discoloration free plaster. 1. The best cement/aggregate...
www.troublefreepool.com
ANSI/APSP/ICC/NPC-12 2016 American National Standard for the Plastering of Swimming Pools and Spas
This standard covers the material and application for the plastering of cementitious finish coatings for in-ground swimming pools or other cementitious water-containment vessels (see Appendix). Except to the extent specified in the Standard, the terms specified by contractual agreement shall...
How to Ensure a Quality Pool Plastering Job
For pool owners, pool builders, remodeling companies, and pool plasterers that want the best chance to obtain a quality and discoloration-free pool plaster job (including white, color, and quartz aggregate pools), the link below is to an article in WaterShapes (a pool industry publication) that...
www.troublefreepool.com
Thank you for all the information. Very helpful indeed.Ten Guidelines for Quality Pool Plaster
There are proper steps to follow for the making of durable pool plaster. There are also improper practices that can lead to early deterioration or discoloration. Following is a ten-point checklist that will help achieve a lasting and discoloration free plaster. 1. The best cement/aggregate...
ANSI/APSP/ICC/NPC-12 2016 American National Standard for the Plastering of Swimming Pools and Spas
This standard covers the material and application for the plastering of cementitious finish coatings for in-ground swimming pools or other cementitious water-containment vessels (see Appendix). Except to the extent specified in the Standard, the terms specified by contractual agreement shall...issuu.com
How to Ensure a Quality Pool Plastering Job
For pool owners, pool builders, remodeling companies, and pool plasterers that want the best chance to obtain a quality and discoloration-free pool plaster job (including white, color, and quartz aggregate pools), the link below is to an article in WaterShapes (a pool industry publication) that...
Thank you again. Along these same lines, how much plaster thickness on average can I expect to lose with an acid bath (non pool draining). Just average, I know there's no way to predict. And how much plaster life is forfeited with an acid bath?
Crosby,
I'll guess again, and we can see how close I can get..
I would think about a 1/16th of an inch...
Thanks,
Jim R.
I'll guess again, and we can see how close I can get..
I would think about a 1/16th of an inch...
Thanks,
Jim R.
Assuming about 1,000 sqft of plaster, 10 µm is 89 oz of plaster.
1 µm is 8.9 oz of plaster.
158 oz acid = 10 µm (micrometers) loss of plaster thickness or 89 oz of plaster.
1 gallon of acid removes about 8 µm of plaster or 71.2 oz (4.45 lb) of plaster.
10 gallons of acid = 80 µm of plaster = 712 oz or 45 lbs of plaster.
80 µm of plaster = 0.00315 inches
1 µm is 8.9 oz of plaster.
158 oz acid = 10 µm (micrometers) loss of plaster thickness or 89 oz of plaster.
1 gallon of acid removes about 8 µm of plaster or 71.2 oz (4.45 lb) of plaster.
10 gallons of acid = 80 µm of plaster = 712 oz or 45 lbs of plaster.
80 µm of plaster = 0.00315 inches
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Note that even though the loss is thin, the difference in roughness can be quite significant because the surface is not evenly removed.
The aggregate is left exposed and this is a significant reason to avoid acid washing whenever possible.
The surface can be like sandpaper.
When you account for the aggregate, the loss of surface will be about double the predicted amount.
1 gallon of acid removes about 16 µm of plaster or 71 oz of cement and 71 oz of aggregate for a total loss of 142 oz or 8.9 lbs of plaster.
The acid only eats the cement, which exposes the aggregate quartz or pebble and the aggregate falls out.
The aggregate is left exposed and this is a significant reason to avoid acid washing whenever possible.
The surface can be like sandpaper.
When you account for the aggregate, the loss of surface will be about double the predicted amount.
1 gallon of acid removes about 16 µm of plaster or 71 oz of cement and 71 oz of aggregate for a total loss of 142 oz or 8.9 lbs of plaster.
The acid only eats the cement, which exposes the aggregate quartz or pebble and the aggregate falls out.
Well, so much for an acid bath. I guess we just learn to live with the discoloration and random black specks in the white plaster?
