Mythbusting Porosity

Original Presentation Date: October 7th, 2020

Some people in the pool industry have believed that porous concrete pool shells are acceptable because they are lined with a waterproof plaster. This is wrong on many levels and recent updates to the International Building Code based on ACI 318 bolster Watershape University's position that the pool shell must be watertight prior to applying interior finishes. This is the first in a series of webinars discussing pool tile.

1:00 hour -Watershape University is authorized by IACET to offer 0.1 CEUs for this program.

CEUs are awarded for successfully logging completion of this webinar through the course curriculum page after viewing the lecture. Further instructions for registering your completion of this course are posted on the course curriculum page below the webinar recording.


  1. List recent updates to ACI 318 Building Code Requirements for Structural Concrete that affect cast-in-place concrete, wet-mix shotcrete and dry-mix shotcrete watershapes.
  2. Explain the importance of ICRI Concrete Surface Profiles as they pertain to waterproofing and interior pool finishes.
  3. Discuss concrete chemistry such as pH and alkalinity and how these affect waterproofing applications.
  4. Identify problems associated with porous concrete watershapes.

A free Wolfpack Webinar

This course is part of our Weekly Wolfpack Webinar series, conducted live every Wednesday at 3pm Eastern/Noon Pacific, and archived as a recording shortly after the live session concludes.