Kerdi flood test failure - what now?
nc8861
15 years ago
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Avanti Tile & Stone / Stonetech
15 years agonc8861
15 years agoRelated Discussions
Does a Flood Test reveal definitively that there is enough pre-slope?
Comments (5)What to look for in a typical shower flood test. A typical shower built today in Vancouver or any city in North America for that matter is most likely a version of what you see above. The shower shown not one I tiled nor one that I waterproofed but a pretty good example of what you should look for and what many plumbers strive to achieve. The flood test above was at about the seven day mark. The shower’s inflatable test plug connected to the yellow extension hose was left in place for about two months and it took about 6 weeks for all the water to evaporate. This shower is in a basement and part of a rental suite in the home. We can learn some basics from studying this picture. For one the shower liner is installed with no wrinkle, no bulges or creases. But is that perfect? Had a proper periscope been installed under the liner the shower’s waterproofing liner would show signs of crinkling a bit. There was a pre-slope but not one that provided a 1/4” of drop per foot away from the drain. This is the minimum you should be searching for. Something that someone is going to need to do and something most likely not included in your budget. The inside corners on this shower where well glued and pressed tight. A good job there and I like how high the plumber brought up the membrane on the walls.The shower dam had no Outside Dam Corners and this is the huge mistake made by the plumber of this shower. Hard to blame him though since most stores in Vancouver selling the liner do not sell the outside dam corners. By the time the tile setter showed up to this shower a comedy of errors had taken place. The shower space was used as storage. I found nails, screws and all sorts of other HVAC wire and off cuts. The drywall crew used their ladders in there and screwed right through the shower dam’s rubber liner to install Denshield. Again, this is not the right way to build a shower but it is the way showers are being built all over North America. Next in was the tile guy. He gets paid to add concrete (4-1 mix or something like 3701 if the client is lucky) to the inside shower floor only and then the tile and grout. All the other work done by other people. So you have a framer for building the walls and setting the shower dam. Who’s fault is it if this shower fails? Who should be to blame? So the shower above was flood tested but the test itself only proved that the shower liner did not leak when tested. It did not prove that there was enough pre-slope but looking at the liner one can tell if you have seen enough done right prior to this one.......See MoreFlood test post-grouting
Comments (4)If Kerdi was used, you could. But you'd want to give the test more time than typical for it to be accurate. During a normal test, when you plug the drain and flood the membrane, there are no porous materials in the shower pan, so the water level is what it is.It's going to stay in the membrane or leak through a flaw in the installation. Flood testing an already tiled and grouted shower? You can flood it, but water will slowly percolate through the grout and saturate the grout and the thinset between the tile and the membrane. Some might even wick up the grout and thinset on the walls and the curb. So you'll have an initial water level, but the water level could drop a bit over the first day as water percolates between and under the tile. You might even see tiny air bubbles come up as air is displaced by water. Once the percolating and wicking is done, the level should stabilize. With the exception of evaporation....See MoreWhen and how to do flood test
Comments (1)You have a response in your other thread: http://ths.gardenweb.com/discussions/4637513/when-and-how-to-do-flood-test?n=1 This site has been acting up lately....See MoreBill, Mongo, etc Schluter Kerdi water test
Comments (1)This is a duplicate post. No answer needed. Can't delete my original post....See Morebill_vincent
15 years agonc8861
15 years agobill_vincent
15 years agonc8861
15 years agobill_vincent
15 years agonc8861
15 years agoAvanti Tile & Stone / Stonetech
15 years agonc8861
15 years agonc8861
15 years agonc8861
15 years agojohnfrwhipple
13 years ago
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