Technical Advisory
This Technical Advisory deals with TCNA methods for Pools, Water Features, Tubs and Fountains
POOLS AND WATER FEATURES (Ceramic, Porcelain and Glass Tile) - pages 183 – 186
This section has changed in many ways. Method P601 has been split into the following two methods:
P601MB
This is now the “mortar bed” version of the method. The details have been improved to reflect mortar bed detailing at the coping and base with several cove base options and coping / decking profiles. More detail is provided in the section; “Preparation by other trades, which includes recommendations for soil reports, engineering analysis, etc… to meet the requirements of ANSI/ APSP (Association of Pool and Spa Professionals). Another important note that appears within the method references ongoing pool water chemistry and balance. In addition, minimum cure times are acknowledged as a critical item to consult with the installation materials manufacturer. Weather protection is also mentioned as a concern during the surface preparation, installation and cure periods. An optional surface applied waterproofing membrane can be inserted into this method. The use of heavily pigmented cementitious grouts are discouraged (primarily blue, green and red). A much more comprehensive section on movement joints is also included in the method requiring more frequent placement of movement joints.
P601TB
This is now the “thin-bed” version of the method. The details have been improved to reflect detailing at the coping/decking and cove base areas.
An optional waterproofing membrane can be inserted into this method. This method can be utilized if the concrete / shotcrete tank meets 1/8” in 10’ and 1/16” in 1’ finish tolerance and has a concrete surface profile (CSP) of 3 or better. If the concrete / shotcrete cannot meet this criterion, method P601MB should be used. The same notes that pertain to water chemistry and balance, soil reports, engineering analysis, minimum cure times of installation materials, weather protection, movement joints, etc… are also part of this method.
A new method appears in this section:
P602
This method should be utilized when the concrete / shotcrete / gunite tanks are not watertight. They can be made watertight with a “cementitious waterproofing layer” applied to the concrete shell. It is important to note that this is not an ANSI A118.10 compliant membrane. These products are produced by Xypex, Aquafin, etc… The cementitious waterproofing membrane may require additional surface preparation steps prior to applying the leveling layers (e.g. power washing).
The characteristics of the cementitious waterproofing are; “recommended by manufacturer for use in positive and negative hydrostatic pressure applications and swimming pools. Must be able to support the weight of the bonded mortar bed and tile assembly; consult manufacturer for application suitability”.
The cementitious waterproofing must make the pool tank waterproof. A flood test should be performed after the cementitious waterproofing is applied and cured per manufacturer’s directions. An optional surface applied ANSI A118.10 compliant waterproofing membrane can then be applied over the cured leveling mortars. The same notes that pertain to water chemistry and balance, soil reports, engineering analysis, minimum cure times of installation materials, weather protection, movement joints, etc… are also part of this method. Compatibility issues could arise with certain cementitious waterproofing products. In order to avoid conflicts; it is best to secure a letter of compatibility from the cementitious waterproofing manufacturer to ensure that the desired performance is achieved. We are already noticing a trend to recommending this method from several of the glass tile manufacturer’s. Bear in mind that many glass tile manufacturers do not recommend the use of a waterproofing membrane directly under the glass tile finish. Therefore, this method reconciles the need for tanks / projects that require waterproofing and the glass tile manufacturer’s restriction on the placement of membranes directly under their product.
TILE TUBS, FOUNTAINS, AND POOLS (Ceramic, Porcelain and Glass Tile) – page 187
This method has remained essentially the same when compared to previous versions. However, the term “curbs” has been dropped from the title and replaced with “pools”. The “pre-formed curb” detail previously included in this sections has been relocated to the section entitled “common shower configurations” on page 170.
In the future we will discuss the stone methods. Please let me know if you have any questions or concerns.
Arthur Mintie
Technical Services Director
amintie@laticrete.com
Tel. +1.203.393.0010 ext. 326
POOLS AND WATER FEATURES (Ceramic, Porcelain and Glass Tile) - pages 183 – 186
This section has changed in many ways. Method P601 has been split into the following two methods:
P601MB
This is now the “mortar bed” version of the method. The details have been improved to reflect mortar bed detailing at the coping and base with several cove base options and coping / decking profiles. More detail is provided in the section; “Preparation by other trades, which includes recommendations for soil reports, engineering analysis, etc… to meet the requirements of ANSI/ APSP (Association of Pool and Spa Professionals). Another important note that appears within the method references ongoing pool water chemistry and balance. In addition, minimum cure times are acknowledged as a critical item to consult with the installation materials manufacturer. Weather protection is also mentioned as a concern during the surface preparation, installation and cure periods. An optional surface applied waterproofing membrane can be inserted into this method. The use of heavily pigmented cementitious grouts are discouraged (primarily blue, green and red). A much more comprehensive section on movement joints is also included in the method requiring more frequent placement of movement joints.
P601TB
This is now the “thin-bed” version of the method. The details have been improved to reflect detailing at the coping/decking and cove base areas.
An optional waterproofing membrane can be inserted into this method. This method can be utilized if the concrete / shotcrete tank meets 1/8” in 10’ and 1/16” in 1’ finish tolerance and has a concrete surface profile (CSP) of 3 or better. If the concrete / shotcrete cannot meet this criterion, method P601MB should be used. The same notes that pertain to water chemistry and balance, soil reports, engineering analysis, minimum cure times of installation materials, weather protection, movement joints, etc… are also part of this method.
A new method appears in this section:
P602
This method should be utilized when the concrete / shotcrete / gunite tanks are not watertight. They can be made watertight with a “cementitious waterproofing layer” applied to the concrete shell. It is important to note that this is not an ANSI A118.10 compliant membrane. These products are produced by Xypex, Aquafin, etc… The cementitious waterproofing membrane may require additional surface preparation steps prior to applying the leveling layers (e.g. power washing).
The characteristics of the cementitious waterproofing are; “recommended by manufacturer for use in positive and negative hydrostatic pressure applications and swimming pools. Must be able to support the weight of the bonded mortar bed and tile assembly; consult manufacturer for application suitability”.
The cementitious waterproofing must make the pool tank waterproof. A flood test should be performed after the cementitious waterproofing is applied and cured per manufacturer’s directions. An optional surface applied ANSI A118.10 compliant waterproofing membrane can then be applied over the cured leveling mortars. The same notes that pertain to water chemistry and balance, soil reports, engineering analysis, minimum cure times of installation materials, weather protection, movement joints, etc… are also part of this method. Compatibility issues could arise with certain cementitious waterproofing products. In order to avoid conflicts; it is best to secure a letter of compatibility from the cementitious waterproofing manufacturer to ensure that the desired performance is achieved. We are already noticing a trend to recommending this method from several of the glass tile manufacturer’s. Bear in mind that many glass tile manufacturers do not recommend the use of a waterproofing membrane directly under the glass tile finish. Therefore, this method reconciles the need for tanks / projects that require waterproofing and the glass tile manufacturer’s restriction on the placement of membranes directly under their product.
TILE TUBS, FOUNTAINS, AND POOLS (Ceramic, Porcelain and Glass Tile) – page 187
This method has remained essentially the same when compared to previous versions. However, the term “curbs” has been dropped from the title and replaced with “pools”. The “pre-formed curb” detail previously included in this sections has been relocated to the section entitled “common shower configurations” on page 170.
In the future we will discuss the stone methods. Please let me know if you have any questions or concerns.
Arthur Mintie
Technical Services Director
amintie@laticrete.com
Tel. +1.203.393.0010 ext. 326
Click on images to enlarge
posted by Henry @ Laticrete at 2:54 PM
0 Comments:
Post a Comment
<< Home