I have been using Kerdi Board for a long time and have noticed that mold grows on it if it is left outside in the rain and elements. But I wanted to prove it in a test so I put a sample in a bucket underwater for over a year. Watch the video for the results.

The Scientific Method:
1.) Make an observation: I tore out a Kerdi shower in Jan. 2023 and saw that the kerdi board was falling apart.
2.) Ask a question: Will Kerdi Board fall apart when it is submerged in water for prolonged periods of time?
3.) Form a hypothesis: I believe if Kerdi Board is submerged in a bucket for a year it will start to fall apart in layers.
4.) Test the prediction: See video.
5.) Iterate and use the results to make a new hypothesis or predictions: Use the same testing method on other brands of wall board to see if they have the same problem or if this is unique to Kerdi Board.

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Here is the video link for the video in Arroyo Grande:
   • SCHLUTER KERDI SHOWER FAILED --- LEAK...  

Here is the video on the Kerdi Board vs Hydroban Board testing:
   • Schluter Kerdi-Board vs. Laticrete Hy...