ETAG 022 is the code or test number for shower waterproofing materials in Europe. I discovered this code after a friend of mine in Greece send me a link to some various waterproofing products. In researching these requirements this morning a lot of interesting tests and processes have come to light.
The first is that the European's use a 50mmx50mm test sample to measure the shear testing. This is outstanding since I used 2"x2" test samples for my mock ups so the test data should be so close.
The second interesting point I found is that these tests are done with and without the other steps included. IE. A test of Ardex 8+9 would be preformed with and without the reinforcing mesh.
The third interesting point is that the tests are also done with a repair scenario in place and this of course would represent the weakest point in a shower build. I will need to re-set some of my test boards later to include this data.
The fourth point of interest is the introduction of heat cycles, lime water and water exposure to the testing processes. So the test that I'm running right now are not really the whole story.
I looked up some Ardex 8+9 testing online And the tests where done in newton/millimeter² [N/mm²]. I converted these numbers to PSI and found this out. Some of the European test where converted from Mpa to PSI.
Check this out. On this report Ardex 8+9 is put to the tests.
Ardex 8+9 was applied over an Ardex P82 Primer and the test sample set with Ardex S48. In the first test the S48 failed at 1.09 N/mm² or roughly 158 PSI. This is a massive weight over such a small (4 square inch 50mmx50mm) area. Here is where it gets interesting. After water contact this number drops a lot. The test after water contact the test failed at 0.66 N/mm² or roughly 96 PSI - this is almost double the North American requirement of 50PSI for bond strength. Then the lowest rating was a test preformed over the Ardex Sealing Strip STB 100-25. This test failed at the sealing strip at a weight of 0.66 N/mm² or roughly 64 PSI. This still beats the North America requirement by 15%. These series of test an the different requirements are very interesting.
I found Section No 126.96.36.199 Pass/fail for Bond Strength has two categories but I'm not sure exactly what they are for. I believe Assessment Category 2 is for concrete or possible commercial use requirements need to meet 72.51885 PSI and Assessment Category 1 is most likely for residential or non-concrete installations - here the requirement is 43.51131 PSI.
Bond strength No 188.8.131.52 Pass/fail
Assessment category 1 (> 0.3MPa) = 43.51131 PSI
Assessment category 2 (≥ 0.5MPa) = 72.51885 PSI
This is a valuable resource these European Requirements and I look forward to learning more about the different tests they preform. What I can take out of this research so far is the requirements for these materials should be in the 50 PSI - 75 PSI range. I have one more test to run today and that is the Laticrete 317 over drywall (1"x1") slate tile at the one week stage. I would assume here that I might see tile failure and that the slate will shear before the tile lets go. Tomorrow I will test the Laticrete 254 at one week with the same size tile and type.