Pre-Slope, Slope, Drains, Membranes....I'm confused.
itltrot
10 years ago
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anna_in_tx
10 years agocatbuilder
10 years agoRelated Discussions
Help with pre-slope removal and drain
Comments (13)Thanks for taking the time to find that link enduring. I think that I'm leaning towards the mud bed vs the SLC + kerdi pan. The "tinny" sound of the kerdi pan had me worried (my wife is picky about things like that) lol. The article you linked was a good read and it pushes me further toward the mud pan route. I finally got all of the wonderboard hung today so I will have to make a final decision in the morning when these beers wear off :-) Unfortunately, I messed up hand cutting the kerdi curb so I will have to make a trip to the store in the morning for the materials to do a traditional 2x4 curb. Above: the curb lines up fine on the top plane...just like the 2x4 template I made Below: Unfortunately, i guess I cut the curb at a pretty severe angle...guess this is why I don't do this for a living ;-) I was going to try to cut a wedge or fill in the gap with the dry-pack or something but since this will essentially be load bearing (shower glass door) I feel like that isn't a good option. I figure I will just grab a couple of the curb perfect kits...it seems like the "for dummies" version of shower building so hopefully I cant mess that up...I am so tired of going to the tile store lol....See MoreAny reason not to slope the shower subfloor?
Comments (9)I do recommend the Noble Drain on occasion to my clients. I have a current client in the US now doing a slope subfloor and Noble FreeStyle Drain. Here is a drawing I worked on two months back What I have learned over the years is that the ease of cleaning these drains is key. The linear drains from many company's have raised grates. This leaves the thin-set and grout open to every shower. This gets nasty in time. Drains from Laticrete, Noble, Proline and Schluter are all much like this. On my current steamer I had a Kerdi Line drain to deal with. So I tweaked it some and framed it. This will improve the maintenance of the shower drain I think and make the Kerdi Line drain more like a ACO Plain Edge. I do not think water is migrating to the drains like we are led to believe. I have been design my showers with improved weep hole and weep channel technology. Lots of theory - not a lot of showers to study. So far my initial builds with my new design are showing great success and looking pretty. Ditra Heat. Wow - I can not go there. I think you will see this product off the shelves in less than five years. You will never see it in any of my builds. When you study the cross section it contradicts everything we where pitched about Ditra. That with the restrictions in the wire choice and thin sets and you have really dog of a sku in my mind. I would not use it. When you plan your wet zone plan on slope outside thew shower back the the shower 4"-6". Plan a capillary break if you think my style (adopted from the Aussies) is worth it. Plan on 1 1/4" of grade change to the top of the drain grate. Skip the tile insert grate for added safety and skip the hair strainer at the same time. I have helped a lot of people plan these showers. Most of the key planning is in the tile layout and material selection. This past year I have recommend mostly ACO drains but have on certain jobs recommended Schluter, Noble and Quick Drain USA. It depends what the hurdles are. It is this reason why the first five years I was diligent about working with and understanding all the drains and their limitations. No one online to my knolwledge has installed anywhere close to the number of drains I have. Lots of men have opinions. But I always wonder where they take their data from. Me - I have learned the hard way. In the field. Building these showers. it does not take much research on the subject to see most men talking about have maybe installed one or two. And then they are the expert. When heating a shower floor we always add the waterproofing over the heating. Not under it. Ditra would not be wise choice. To get the best heat transfer you need to do a little creative planing and design the shower like a divot method. This gets tricky and to do this I would be recommending a NobleFlexFlashing and standard drain. Then you could do something like this job. The picture below shows a heated shower floor. The tile edging is Pro-Parts by Butech. I call this a Kwaywk Style shower Drain. Rod Kwawk is one of the Countries top installers and I was inspired to do this build after following his work for many years. In order to achieve the grading with a regular point drain and large format tile I used a medium bed thinnest from Ardex. X32. The drain is by california faucets and comes with a powder coated cast iron rough in. Sexy. Good Luck....See MoreDoes 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 MoreMaximum slope of perforated collector / French drain
Comments (15)Thank you, Yardvaark. This is super helpful. I took some pictures of the area this morning. See below. Light was very low, but I hope it gives you a sense of the layout. I was planning to slope the swale away from the house and create a space of about a foot between the v-/u-shaped channel and the house. I posted a drawing of cross sections of how I imagine the swale being built below, which illustrates how the swale is the deepest at the top (to be below the pipes that come from the patio collector drain) and how it becomes more shallow toward the bottom of the hill. Our property ends 5 feet from the wall of the house, so unfortunately I can't move the swale any further away. Our house was built in the 50s and there is no drain placed next to the foundation. I am worried about getting closer to the foundation without the consultation of a structural engineer. My hope is that the drain will capture any water that seeps through the gravel bed from the patio drain and therefore will run below the swale while also intercepting any water that is trying to move laterally toward the foundation. I assume that the sealed surface of the concrete swale will prevent any water from entering from the surface. Given the situation and also the fact that I already dug the trench, do you suggest any important changes to the design of the drain/swale that I need to incorporate to make the installation effective?...See Moreitltrot
10 years agoanna_in_tx
10 years agoitltrot
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10 years agoMongoCT
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10 years agoMongoCT
10 years agoitltrot
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10 years ago
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