HOW TO FIX LEAKING KERDI SHOWER ---No Need to Remove Entire Shower!!!

This homeowner saved about $10,000 when we were able to repair this leaking tile shower. Instead of having to remove the entire shower, we were able to just remove the pan, the curb, and the bottom row of wall tile. While this repair is done routinely on older types of shower waterproofing, it is much more difficult to do correctly when using a Schluter Kerdi or foam system. This video explains in detail how to do it the right way.
If you would like to see the forensic diagnosis of why this tiled shower leaked, here is the video link: • SCHLUTER KERDI SHOWER ...
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If you need help on your tile project, please visit www.tilecoach.... to book a 1 on 1 session with me.
For an older video on how to repair a kerdi shower like this without having to remove the entire shower, watch this video: • How to Repair Schluter...

[@jerryhernandez5122]

I love how all this new way stuff needs repairs. I've never needed to repair the old Oatey rubber membrane. I spoke with a Shluter rep, asked him why Tile Coach put up a video on Schluter leaking after the 24 hour test. Repairs said its not a pool. It's made to withstand 24 hours bit no one ever keeps water in a shower that long. Very poor answer. The main thing is that it eventually leaked. Sometimes the old way seems like it works best. That rubber pan just won't leak as long as you don't puncture it with nails or screws

[@AJourneyOfYourSoul]

It's also much more forgiving for a DIYer to install.

[@PlucharC]

The original Kerdi system was likely installed incorrectly, nothing to do with new or old. Wedi, KBRS, and other similar foam board systems are easy to use, but an installer still needs to educate themselves on how to make it work right. Clearly they didn't in this original install.

[@fireace9045]

Ive yet to pull out a rubber liner that hadnt leaked. Thing is, thats why i called in to tear them out. Leak at the drain and at every corner. All comes back to proper installation, regardless the product

[@Chanmantroop10]

Did you even watch the original video showing why it failed? The installer wasn't experienced with kerdi and this was his first time using it and didn't use a corner band in the area it was leaking. So don't blame the product. There's pros and cons to different methods but if kerdi was always leaking and inferior, they wouldn't be in business

[@russelljochim8607]

Honestly it’s people who don’t know how to do kerdi correctly what causes these new showers to fail. If you do it right, it won’t ever happen. Take extra steps to make sure there are backups to a possible failure and your fine. I’ve never had a bonded shower fail since I’ve started using them. It’s all about time and effort put into your job.

[@andreww6738]

I absolutely LOVE the way you diagnose the problem, though I like the Schluter system, I have always wondered the defined importance of following every installation detail. Customers ask why it has to take so long to build a shower and man I feel like wackin them one, quality has to take careful planning and most of all careful, careful Installation. In the long run it is cheaper to do it right the first round...don't I know it! Great work you guys do, absolutely awesome walk-through. Have a great week! Andrew. Ontario 🇨🇦

[@roczilla6834]

Thanks for the tutorial. This video has given me the confidence that a shower pan can be repaired without tearing out the whole thing. Way to go, you guys rock and keep up the great work👏🏽👏🏽👏🏽

[@GS-lh2nx]

The more I watch these the less I want a tiled shower. That said I love your enthusiasm and attention to detail. You are a great teacher and a master of the craft. Looks like you even got to endorse those RSS products. That's really saying something and if I ever did put in a tiled shower or had it done I would certainly demand everything you use. Thx coach and well done

[@dougSUNLOVER]

Thank you,Isaac! I ordered Flo FX drain for a very reasonable price. It delivered on the exact day,promised and was super easy to install. The square design and ease of last minute adjustment made for a big help as I at moms not a professional! Thanks for all your instructive videos.

[@EDHBlvd]

I enjoyed the instrumental “Oh Holy Night” music. Kinda of a goodbye to the holidays. Cheers Isaac.

[@lisac7386]

I just did some investigating and will probably need to do this repair. The problem will be finding a contractor - few people want to try to fix someone else's mistakes. And fewer still will be happy when I am watching every step of the waterproofing process!

[@roberthager369]

Thanks Issac for the informative and instructional videos on how to do a pan replacement without a complete tear out. I also like your investigative approaches to such failures and the cause of the failures. That insight helps us in our approach and product selections. I had a much larger company with several crews and fully subbed out all my tile work. We generally only roughing in the shower framing and there forward the tile person would do the waterproofing tile setting grouting, etc. My person retired and I can’t find any qualified individuals in my area in York Pennsylvania that can do the high-end work to the degree we need them for so we have taken on that aspect ourselves. Since Covid, I have downsized and I’m doing the showers myself and our company has fully focused on kitchen and bath work entirely mainly bathrooms. I’m very interested in the revolutionary shower system and sheet membrane. I’ve also directed some others in the trade to the Flow FX drains. Keep doing what you’re doing and thanks again from another brother in the field!! Your awesomeness astounds me!!

[@SG-jc2hr]

KBRS and GoBoard make for an easy and rock solid install, not to mention, waterproof!

[@S0ul5Hun73r]

can you use hydroban liquid to go under/over/inbetween the sheets/fabric and the kbsr basin for 100% waterproofing?

[@sylkiastewart6098]

Is just a preference! We use Schluter Kerdi for all our showers and we never had any problems.

[@engrxtn]

That’s why I applied aque defense on top on my kerdi joints, bench and pan. Working perfectly so far.

[@bartosullivan8050]

I just ordered a RSS Pro Shower System and look forward to installing in a remodel. Love that it's an American Company based in Idaho and supporting American is a priority in all my purchases. They'll also make the pan to your exact size which to me was important as I did not want to move the existing drain location. Thank you for introducing them to me and I hope you continue to support them so that more of your viewers and subscriber's like me will do business with them. Loved the music choice and God Bless.

[@Mike-om4tv]

This is amazing, exactly what I needed to see to repair. Got a wood 2x4 curb that failed, got swollen with water and started popping tiles and grout. Gonna try it myself, and worst case half the demo is done if I fuck it up lol.

[@kevinhornbuckle]

Why did the curb fail?

[@scottkouns8578]

Another fantastic video. Thanks for the forensic breakdown of what happened and the fix! Well done.

[@ryanodonnell1892]

Man! You are a Pro! Been watch for a couple of years and have learned so much about new tile products from experimentation and onsite work. Your contributions to my skills is much appreciated!

[@jeanclaudevandam4974]

Hey Tile coach. I hope im not being intrusive with this question. If I remember correctly in one of your videos you talked about being sober. Maybe I am not remembering correctly. But if that is true I give you alot of credit. I'm also getting sober. About a week now. I look forward to the sober life. Thanks for the videos.

[@Carlos-uo4ox]

You the man! You gave me confidence to do mine. I’m definitely calling you if mine fails thanks for your videos . Love you too bro .i live in Fresno so it won’t be that far of a drive

[@BlameSomeoneElseForTheRest]

Funny how I just did this type of work in a bathroom, this shower had subway tiles it was a pain to remove them. I’m working go on a second shower in the same house. I used the Schluter pans and membrane for both. Both pans passed the flood test but after seeing your videos I ran out and bought some red guard and applied it on top of the membrane. I haven’t got any call backs on other showers I’ve done but it doesn’t hurt to be safe. Thank you for your videos keep on spreading your knowledge.

[@billycarson3408]

Awesome video as usual. I’m not sure why installers think the directions don’t apply!! It’s so very important to do a water test, people around here in Kentucky don’t seem to. I do, it helps me to stand out. Keep up the good works coach

[@Ninjump]

So I've been to Schluter's installation workshop where you can see ~15 teams working on the same shower pan assembly. It is awesome training but one thing I noticed the most? People putting down too little or gone off thinset on the joints where two boards come together. They give you a specific size trowel but if you don't hold it correctly you can end up with very little thinset under that band, and then it's pretty much guaranteed you'll get a failure there. Two inches of band either side of the joint is not enough coverage in my opinion. I'd use more thinset and do 4 inches (8inch wide bands) to give yourself a little more forgiveness and ensure a good install. Very interested in the RSS board. Cool video

[@beachboardfan9544]

Tileredi for the win! Great example of the flaws with the kerdi system.

[@ShawnDog211]

This is a great video. I love the step by step communication and forward and backward documentation within the video. Love it!

[@bvictory5698]

Hey issac, nice job. I have had to do this twice in the last two years, both showers were like 8-10 years old and both had failed at the drain and had cracked grout on the curbs, I was not the original installer. I had never done this type of repair before both home owners didn’t have the money to do a complete shower redo so I repaired them with kerdi in this same fashion. It worked out great! Had zero reports of issues. Glad to see I’m not the only one willing to roll the dice and repair the floor and curb and replaced bottom row of tile as you did here. Only difference was I used red guard along the joint on the wall just to be sure it wasn’t gonna be an issue down the road. Again, nice job bro.

[@HaroldRutila]

Thank you for this video. I have 2 showers done by a flipper where the tiles over the pan were done after the wall tiles. The pan tiles are peeling up on all 4 sides. (We don’t use either shower, because we have a shower tub as well.) This is what I was thinking of doing in late winter to fix them both.

[@Doinprettygood]

I wish I would have went with this system. I still haven’t installed the pan but I’ve already bought the shower kit and used the kerdi on the walls. So can’t take it back. I do need more curb tho. Wonder if I could use these curbs up against my Schluter pan that I can’t take back. Anyone have any insight on what I could or should do? I love watching these videos tho! Guy has a great spirit about him that makes him nice to listen to. You can hear the integrity in his voice. IMO.

[@kimgoforth4180]

Enjoyed both videos on 5his shower! Very informative! Have parents and a sister who had a stroke who have a bathtub old shower they cannot use sadly, so trying to figure out some way I can tackle this myself! You seem like a Awesome guy! Will look for more tutorials from you before I try and tackle anything! Lol Thank you for playing a beautiful background song also! One of my favorites of all time! 😊 God bless you and yours!!

[@florianm3838]

Thank you for your great videos. I have seen your processing error in your old schlüter Kerdi video. The strips in the edge area must always overlap. That is, the edge strips must be led all the way into the corner. The Kerdi waterproofing membrane may be glued with flow adhesive. The edge strips and corners must be glued with a two-component resin, otherwise it is not tight. The thin membrane has the advantage that it is very flexible and therefore remains tight for a long time when the fundation moves.

[@oxdogoxSF]

The woodworker in me cringes every time I see you using that wood chisel. Always good information in your videos totally appreciated!

[@disel1983va]

MAN THAT WAS A STUNNING FIX VERY NICE AND VERY GOOD VIDEOS!!

[@totheknee]

2 days. Damn. It's taken me a week so far and I'm only at the "expose backing behind tiles" stage. 😅 We've been using a dishwasher hose rigged up to our sink, connected to a handheld sprayer taped to our shower curtain rod while the shower is out of commission... (I'm only removing part of the wall so a plumber can move our shower valve. The shower is still usable with plastic sheeting taped over the 2'x3' hole.)

[@_K_W]

Beautiful music on the speed up. One of my favorite songs.

[@kyle.brandon]

I agree the flowfx drain and the solid curb are nice. However, the RSS seems like the exact same system WITH and extra step of applying the membrane on the pan. My understanding is the failures in any of these systems is in the corners and seams. Not with the overall structure or thickness of the membranes. I know redgard/aqua defense etc probably void warranties. But it really is safe insurance to just throw a few coats down on the finished pans to ensure you have a nuclear proof shower.

[@BADMONTESS]

Also use Anti-hydro in your grout to waterproof it too, but thats too old school. Liquid Insurance is what I call it. Been in the tile game since 83, do mostly high end custom residentials. I copy you. I feel you can never go too overboard by simply adding a couple layers of a wp memb, simply pennies and minutes versus a failure. You give water somewhere to go, it will find it.

[@marcgambone4240]

Hardi backer walls is a plus in this situation....I find that it delaminates the first layer when you have to do a repair on it opposed to cement board that is damn near impossible to pull tile off of without ripping it to shreds. Unless the cement board has a waterproof membrane, then you can get tile off without total destruction

[@seanmellows1348]

I have done very similar repair work, it’s possible, but it’s extremely laborious. It never fails to amaze me how incredibly shoddy some of the installers out there are. Like, a lot of them.

[@scorpio6587]

Great video. I enjoyed the Christmas music during the timelapse.

[@shoegum7362]

This channel honestly made me worried about any shower being installed in any of the houses we own and manage, just going to stick with the common tub.

[@bri0013]

Just don't hire the 1st Joe that gives a bid. Ask questions and references.

[@IFLYRCHELICOPTERS]

Thanks for both of these video series of Kerdi Board done wrong. After watching this video, I had plan to DIY a Kerdi system but now on the fence for 2 reason. The possibility of doing a repair in the future seems delicate than the old way and how the Kerdi curb is hollow. I was replacing my tub drain and broke the pvc drain pipe. One thing led to another and now the tub and walls are removed. The goal now is to make it into a shower. Tile coach, I need your expertise … Tucson, AZ.

[@johnoconnor9742]

Always great videos, its interesting how different the methods you use differ from how its done in Europe, we used tanking and slot in shower trays

[@paulurmanski4745]

This was very impressive and as you mentioned a great "less extensive" repair then a complete removal and install. When you are finishing the wall tile to the floor, what is your recommended process? Thanks!!!

[@jwhartwayne]

Another great video. Love watching this stuff.

[@ckva7888]

Too much thin-set between the membrane layers creates a wicking path for water and leads to water retention / mold behind the tile. There was way too much thin-set behind that tile and between the membranes. It looks like the old school installer floated a mud bed over the kerdi. You have to flatten foam board systems from the back by fixing the framing, Shimming or wet setting the board and fastening after the wet set hardens. Also let the install fully cure before flood testing. Some times more is not better follow the instructions and the system will work. For every failure there are tens of thousands of successful installs for every system out there.

[@angelonearth8498]

I love watching your videos!

[@Geeven1]

Nice video Isaac you make the world bedder and bedder❤

[@jonviall5566]

THANKS FOR WHAT YOU DO

[@ryankendrick3541]

Love your videos, keep up the good work ! God bless

[@NickHaddan]

thanks coach! much appreciated!

[@mohammedazeem]

Beautiful working time already s good work and your management working to the this job is good

[@Geeven1]

Isaac is the best ❤

[@TR4Ajim]

I would really like to see you do a KBRS or Tile Redi pan install, and compare to a “board” style pan.👍

[@phillipaddicks]

i know you're a pro, but damn, cover up that shower drain man! you're living life on the wild side. Thanks for the content.

[@AlexeiTetenov]

Thanks for sharing!

[@askthisoldtileman8264]

Great job trying to do it right as always. I notice when you trowel the back of tile you clean edge. Be careful not to close up your ridges check out Tcna guidelines just a thought. Good job as always. If I get a chance to go out there I will pay for your golf fee. Lol

[@marcosvalencia8039]

I appreciate all your videos. Thank you for all the videos.

[@rogerghiardi7723]

Awesome stuff

[@aaronm3400]

Tile guy. Why don’t you use a topical application after you install the corners and bands. I thought thinset wicks. So it might make its way thru under the bands and corners. Thanks. Love the channel.

[@jamestom2510]

Awesome !!!

[@Alex.smiffy]

A good reminder that storing extra square footage of your tile can make a difference if the shower fails in the future.

[@Phantoma3]

I agree and have two boxes of every wall and floor tile used in the house as spares and they're stored in the attic where they're not disturbed.

[@redneckforeal6901]

What a great video and knowledge from someone who clearly loves his job thanks enjoyed and subscribed

[@jimgale8465]

So as a newbie, I haven't got all the buzz words down yet, let me stumble through this.... the shower is a 3x5 with a center drain... one of the kits available... I'd like to lower the curb, say to about 2" above the highest part of the foam pan... With out measuring I'm guessing this would lower the curb a couple of inches, maybe a little more, to easy entry for someone who has balance and lifting issues...

[@robertpost8939]

Thanks for all the awesome videos! Getting. ready to demo a leaking shower pan in my bathroom and wanting to know which is the best system. PVC liner or Kerdy, RSS?...

[@jonviall5566]

MANY THANKS

[@thehealerguy]

Thanks for these videos. I'm a DIY'er and watching your channel has given me the courage to tile my shower. Question, I'm using Schluter board ( 2Walls). Is there any con to using Hydro Ban as an additional protection after I've sealed the schluter board as per instructions?

[@cliffordalbritton8517]

Awesome video...thank you

[@vicentamartinez]

Nice job

[@doofusmaguilacutee4998]

Did you bring the pan & drain down with you from Sacramento or purchase from a local tile supply house? I'm a GC from San Luis Obispo who has been watching your videos and was interested in trying that RSS system on the next shower install , but so far I haven't seen it around here.

[@kenbagwell8551]

He has a link to their website in the description. You have to contact them for a quote. Probably expensive, but I agree that it looks like a great system.

[@jasonward759]

Great but i still would of put red guard or adex 9 .

[@bigbob9702]

I did not see the requisite kerdi band connecting the floor to the preformed seat. That would have helped to prevent the wicking I think.

[@ES-yi8vv]

Quick question. Why do you put the board on the wall before the pan goes down. I thought you wanted the wall to come down to the foam pan? I guess it just doesn't matter since you are waterproofing all the seams.

[@MrTooTechnical]

Great vid. Did u add any liquid applied waterproofing on the floor before the pebbles went down?

[@MasterBojangles]

The kerdi board act as the membrane, no liquid membrane is added

[@Chanmantroop10]

No flood test for the repair? Also, this was a chance for the owners to get rid of the pebble tiles that will cause so much grout problems and up keep!

[@stephenedwards9872]

May I ask why do they not use a plastic shower tray like they do in the uk.

[@nickhickson8738]

I guess they like fancy.

[@Michaellove85]

So what makes your stuff better then schluters

[@AA-sq1xz]

different color. It still uses thinset which will wick water over time.

[@robertdrew5978]

Check to see if shower door has screws going into top of curb. If so, look no further.

[@robertdrew5978]

If the shower door track is screwed to the top of the curb it's all over and going to leak.

[@markegan1690]

I like the Christmas music

[@JM-io4vb]

I recently did a DYI bathroom reno and decided to try out the Kerdi system. I'm not a professional, just a dumbass who watches KZbin videos and thinks he can do stuff (it usually turns out pretty good!). Anyway, my take on it is that I will never use a foamboard product like Kerdi again. My reason - the stuff is really lightweight, and I worry about how a repair (like this one) will be affected by the "fragility" of a product like foam board. In fact, in my project, I had to re-solder some piping after the board and tile was installed because of a pin hole leak. I had access to the piping via an access panel in a closet behind the shower, but I can tell you that sweating a pipe near a foam board product wasn't fun. Maybe these are good products for pros, but I'd stay away from them if you are a DYI-er and do a bathroom once every 10 years or so.

[@BlacGyver]

I don't know why people still use Kerdi, it was great when it first came to the US because there were not many other options, now with technology advancing so much, there's better, assessable cheaper options. I use a foam cement board from floor and decor, sentinel. you can tile the same day after installation. just pay attention to all the bottom seems and your done. Good professional seal, half the cost and time.

[@adamnorthville5636]

Thanks

[@esaualonso1568]

I have a question, can I use ditra over my plywood subfloor, then dry mortar pan and then kerdi on top? My house is very old and the foundation is not the strongest so I am afraid that the movement of the house structure may affect the tile.

[@lukebryant6110]

Great video as always! Do you have any thoughts on the tile redi tile able shower pans ?? At first glance it looks like it would save a load of work but perhaps it is quite pricey

[@marka2449]

No flood test before tile? What about the seat waterproofing since the original installer clearly did not do the corner water proofing. How do you know the seat was waterproofed correctly?

[@shanemaitland8010]

I am currently building a shower for my mother. I did my research and seemed like Kerri was the best way. Have I made a bad decision or is this stuff just caused by improper installation. My project needs to be the last time there is a shower put in her house.

[@fly4fun24]

nica video as always, have you tiled a wall with a round window about 28" diameter. I looked all over could not find a single tip about it

[@flavioforteoficial]

This guy is really good at what he does. But the feeling is that Schluter didn't want to sponsor him and now he insists on badmouthing and finding problems in ALL their products.

[@jasonknight219]

Question if you have a second. I’m putting in a full Schluter-Systems system with there foam floor as well. Would you recommend coating the floor and drain and floor corners with a hydro ban to try and keep that Kerdi drain from breaking down in the long run?

[@Tacompton425]

Why not sponge down concrete prior to thinset to give concrete a drink and promote better bonding?

[@mikemike9747]

I have a shower like this but i believe it's leaking from the drain/drain seal(square 4inch ish drain). Is it possible to replace just the drain seal(from above the shower, no underneath access)? Is it as "simple" as popping out just the drain assembly and tossing in new seal or will I have to excavate some river rock flooring around it first?

[@phishertube]

Hey Coach I'm a subscriber and a new house owner i took your advice a few months back and went with Schluter and now I'm mortified. Lets use our heads here if you look back at your kzbin.info/www/bejne/rHfTZ6Sfi9OCaqc failed video at 13:23 of that video you mentioned the wicking properties of thin set, if you look at the video you will see the thin set is wet the whole entire run of the Kerdi band and is darkened so it was all wet, i agree but even if the inside corner was place the thin set is still wicking all around the Kerdi band because a thin layer of thin set adheres the Kerdi band to the floor pan and the Kerdi membraned wall so once the water hits that microscopic layer of thin set it will wick between the Kerdi band and the kerdi floor pan and delaminate. I agree that the missing inside corner made it fail quicker but it would have failed anyway (as you said wicking thin set). RSS will do the same, you need to start testing thin set and its wicking properties. Modified and unmodified. I just finished my shower a week ago doing Schluter to the tee as per instructions and using Schluter all set thin set , Schluter floor pan, inside corners, outside corners, and Kerdi band all per Schluter instructions, so I'm curious if it will fail. Modified or unmodified? i hope you do a test on wicking properties test of thin set. Maybe one week old cured thin set in a bucket of water , or better yet a one inch layer of thin set in a painters tray on a angle half in water half out and see if it wicks? Maybe this is a loosing battle and a fiberglass pan is the only way to go. I'm not blaming you I'm just playing Devils advocate, keep posting brother..

[@Faruk651]

There is no such thing as 100% water proofing with custom shower pan. People don’t understand this. If you follow the instructions and do a proper job. It will take years to fail, but it will eventually fail. If you do a mistake in the pan, it will be fast. In wood construction houses, custom shower pan should be banned by building codes.

[@phishertube]

@@Faruk651 I think you're right, unfortunately for me my shower is complete and even though i did it to a tee of Schluter's instructions and all their products i feel it will leak in a few years after seeing this video.

[@Faruk651]

@@phishertube If you didn’t make any crucial mistakes, I think you are fine for 5-10 years. If you start seeing a lot of kerdi failures in the next 5 years. Rip it right out. This system has no room for mistakes.

[@phishertube]

@@Faruk651 Thank you

[@chay2327]

I have a question. When you are putting those pieces in the corners and over the cracks what is being used to put those down?

[@blacksunshine5758]

This is why I’m afraid to have my fiberglass new construction 4 piece shower walls/floor replaced with tile. What if i get someone who cuts corners like the original installer on this job. My house is 16 years old and no leaks. It’s ugly but NO LEAKS. Function is better than beauty.

[@MistAtsiM]

That cement glue does not meet code here in midwest as far as I know they won't let us use that to meet the 2. I don't see why manufacturers don'take abs and Pvc for a piece of mind and cover Every1s rear.

[@chadhouse1375]

So where can a Revolution shower system be purchased? It looks similar to schluter but obviously better

[@jackspade2576]

I'm always trying to explain to new residents that these are normal CA weather systems and not to believe the hype but they would rather believe the news talking heads

[@brentsmith2384]

He said he got good coverage on his time.lmao.the tile popped right off.nothing stuck to the tile.looks like he used a v notch.unbeliveble.the bigger the tile,the bigger the trowel.i skim my wall and back butter tile too.cant beat a 40 mil rubber pan.AND,hardibacker is garbage.use permabase cement board instead of glued together,brittle cardboard.🍻

[@tonysosa6731]

Question? Does it matter if the mud you put on the floor flows one way and the mud on the tile flows the opposite way? And is it the same process when tilling a ceiling?

[@yodabomb2018]

Where’s the next video when they finish it ?

[@jjmo33]

Can you add Redgard over the Kerdi for redundancy?

[@jimsjacob]

Note to self: Do Not Use Kerdi Board products. I thought I was going to go with this product/process, but not anymore…. We’ve been sold an idea that may not do what it’s supposed to. I get that there could be installer error here, but it looks like the slightest mistake ruins the entire project.

[@rogerghiardi7723]

Do you use banding and corners on all the RSS pans you do. That one didn't have the morter type coating I think. 👌

[@caytonflooringllc8469]

Yeah, I'll stick with Oatey and Durock.

[@M.Jsmile]

I’m looking at putting in a culture marble base for the shower with tile walls. Is culture marble a good product in your opinion? Currently have a tile base that has failed similar to this video.