I just watched a new video by Schluter System's training department that showcases the benefits of a Kerdi Shower design vs a Traditional Shower design. In the video the narrator says that a Kerdi shower dries out completely between uses. I have often wondered this and wonder how Schluter has tested or proven this. Jim do you know where I might find the research data on this?
Did they show you any studies in any of the Kerdi Training classes you have attended?
In my own testing I have found that Kerdi (and NobleSeal TS) wick water a few inches. This ultimately increases the evaporation zone and increases the speed in which a shower test box will evaporate. But if for example you have some 12"x12" tile in a 3'x5' shower are we to believe that all water getting below the tile is going to weep or evaporate to the Kerdi Drain in say a 24 hour period?
I'm sensing another head to head battle looming.....
What's your take on this claim Jim? I'd call Bull-Shit and that there is no way it can be true. I would however say that head to head in a week dry out period a Kerdi shower would dry faster than one build with a traditional style. I get my knickers in a knot when Marketing Teams make such general claims and the detective in me wants to do a little "Myth Busting". I have been wondering for a while now if a improved weeping system with a standard shower build would or could actually out preform a Kerdi or Noble Shower build. Time to make a few more mock ups I think.
If I take a 2'x2' mini shower base and built it with a Kerdi Drain I can flood out this box. I can then weigh it and see if it in fact does dry completely in a 24 hour period. Likewise I can do the same with a regular shower drain. That could be on version.
Or I could build a 4' x 6" shower mock up and place a container of water into the design. Maybe core a hole and leave the container to dump out below the tile elevation. Do the same with a mortar bed and see what drains faster.
I'm going to go out on limb and say there is no way a shower dries out completely between uses unless it has floor heat installed below it.