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Material Selection Conference: Panel Discussion No. 1

Monday, July 17, 2017

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Durability + Design is set to launch its inaugural Material Selection Conference, a one-day seminar on Tuesday, Sept. 26, at the Hyatt Regency Pittsburgh International Airport in Pittsburgh. Be sure to register here.

Photos: KTA Tator Inc.

Eight building scenarios involving the use of coatings and water repellents on CMUs will be addressed, covering issues ranging from application on new construction with damp walls or in cold weather to maintenance of existing coatings where paint is blistering and peeling or existing water repellents where color must be retained while removing efflorescence, calcite stains and lime.

The conference program will be divided into two sessions, featuring panel discussions and presentations. The panel that closes out the first session is titled, “Performance on Exterior Walls of Specific Coating and water Repellent Brands” and will be moderated by Ken Trimber, president of KTA-Tator Inc.

Discussion

The panel puts a new spin on typical conference discussion by incorporating specific brand recommendations for multiple scenarios—a far cry from typical generic discussion.

Trimber conceived of the novel panel discussion format that has suppliers presenting the merits of their specific brands, and he developed the program first for an all-day workshop on Jan. 31 at the SSPC 2017 conference and exhibition in Tampa, Florida.

Members of the audience expressed satisfaction about the value of the session and said that the event helped them to distinguish among brands. On the basis of this success, Durability + Design decided to adopt the approach for its Material Selection Conference in September.

“I’m glad that Durability + Design has embraced the concept of allowing coating and water-repellent manufacturers the opportunity to openly discuss the merits of their specific brands for solving problems,” Trimber said.

Trimber noted that the audience will be encouraged to ask questions throughout the session, stressing that with the competitors keeping each other’s claims in check, the attendees will walk away with the names of specific products they can use to solve their problems.

“For anyone having questions regarding the treatment of their exterior walls, a few hours at this conference is going to save you days of research,” he added.

From left, panel members Chuck Duffin, Tyson Lodge, Tom Tipps, Michael Edison and Christopher Perego.

Panel members who will discuss the performance of their companies’ coating brands in these scenarios include Chuck Duffin and Tyson Lodge, of Sto Corp.; Tom Tipps, of Keim Mineral Coatings of America; Michael Edison, of Edison Coatings; and Christopher Perego, of BASF Corporation.

Panel Scenarios

In the upcoming September program, eight building scenarios involving the use of coatings and water repellents on CMUs will be presented to the panel, and the manufacturers will discuss the benefits of their product(s) in addressing the needs. At the end of the discussion, the attendees will have a better understanding of the advantages and disadvantages of specific brands of coatings and water repellents that are candidates for use on the exterior of buildings.

The format for each scenario is as follows:

  1. The moderator describes the scenario.
  2. Each manufacturer representative who chooses to respond describes one or more recommended solutions.
  3. Attendees are encouraged to ask questions during the presentations.

Brief descriptions of the various scenarios to be discussed follow.

Scenario 1: New building in Pittsburgh to receive water repellent
Unique challenges: None

A new CMU building will be constructed in Pittsburgh. Integrally colored block will be used. The wall is single wythe. Water repellent is to be applied to the exterior of the walls and is the primary weather-resistant layer. The schedule will allow the walls to thoroughly dry prior to applying the water repellent. Objectives are to prevent moisture intrusion and to have long-lasting performance.

Scenario 2: New building in Pittsburgh to receive coating
Unique challenges: None

A new CMU building will be constructed in Pittsburgh. Standard block will be used with no integral water-repellent admixtures. The coating is to be applied to the exterior of the walls and is the primary weather-resistant layer. The schedule will allow the walls to thoroughly dry prior to applying the coating. The objectives are to prevent moisture intrusion and have long-lasting performance.

Scenario 3: New building in Pittsburgh to receive water repellent or coating
Unique challenges: Damp walls

A new CMU building will be constructed in Pittsburgh. The wall is single wythe. The owner will accept integrally colored block with water repellent or CMU that is painted. The water repellent or coating will be the primary weather-resistant layer. The schedule will not allow the walls to thoroughly dry prior to applying the treatment. Objectives are to prevent moisture intrusion and have long-lasting performance.

Scenario 4: New building in Pittsburgh to receive water repellent or coating
Unique challenges: Cold temperatures during application

A new CMU building will be constructed in Pittsburgh. The wall is single wythe. The owner will accept integrally colored block with water repellent or CMU that is painted. The water repellent or coating will be the primary weather-resistant layer. The schedule requires that the treatment be applied during the winter, with temperatures as low as 20 degrees Fahrenheit. Objectives are to prevent moisture intrusion and have long-lasting performance.

Technology Publishing Company

Moderator Ken Trimber conceived of the novel panel discussion format that has suppliers presenting the merits of their specific brands, and he developed the program first for an all-day workshop on Jan. 31 at the SSPC 2017 conference and exhibition in Tampa, Florida.

Scenario 5: Maintenance of existing coatings on a building in Pittsburgh
Unique challenges: None

CMU walls were originally painted with block filler and two coats of elastomeric acrylic. An additional two coats of elastomeric were applied during subsequent maintenance. The building is being repainted to change the brand. The owner is concerned with the reduction in permeance that occurs each time additional coats are applied and the resulting potential for moisture to be retained within the wall assembly. The owner has funds for two more overcoats within the next 20 years in the long-range budget, with no allowance in the budget for full coating removal. Future maintenance painting will need to consider the breathability of the system so water content does not increase to the point that it causes moisture damage to interior and exterior finishes. The permeance of the existing system is believed to be approximately 16, and there will be problems if the system falls to 2 or below. The walls are dry and the existing coating is in good condition. Painting can be performed during the summer.

Scenario 6: Maintenance of existing coatings on a building in Pittsburgh
Unique challenges: Existing paint is blistering and peeling; walls are damp

Same conditions as Scenario 5, except that the existing paint is blistering and peeling within the original block filler. The blisters are filled with water. The walls have been tested and are damp, and it is expected that they will be damp at the time of application.

Scenario 7: Maintenance of aged water repellent (siloxane) on a building in Pittsburgh
Unique challenges: Retaining the color when removing efflorescence, calcite stains and lime prior to installing new water repellent

Integrally colored block exhibits efflorescence, calcite staining and lime run on both the exterior and interior. The walls received a water-repellent treatment a few years ago with a water-based siloxane with 7 percent solids, but Rilem tube testing shows that it is no longer effective. The owner wants to maintain the current appearance by using a clear water repellent. The owner is also concerned that removal of the efflorescence might change the color of the block and wants to make sure the color is restored before applying the water repellent. It is anticipated that 40 percent of the wall surface will need color restoration prior to treatment with the water repellent. The walls will be dry at the time of application.

Scenario 8: Maintenance of aged water repellent (siloxane) on a building in Pittsburgh
Unique challenges: Retaining the color when removing efflorescence, calcite stains and lime prior to installing water repellent; walls will be damp

Same as Scenario 7, except the walls are damp.

For more information on the conference, visit durabilityanddesign.com/materials.

   

Tagged categories: Conferences; Performance testing; Water repellents

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