What THINSET Should You Use???

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  • Опубликовано: 28 сен 2024

Комментарии • 157

  • @MarkAlbert
    @MarkAlbert 2 года назад +37

    Your explanation here was the best I ever found about using modified vs. unmodified thinset mortar. Last year, I was asked to replace a bathtub and tile surround. Based on my research and knowing the client, I chose Schluter Kerdi-Board as backing for the tiles, but was thrown off by them requiring unmodified mortar, really hard to find. Struggled with this quite a bit, but good to know for future jobs that modified also works for Kerdi-Board now. You really know your stuff, Isaac! Thanks for sharing it with the world!

    • @kurtbilinski1723
      @kurtbilinski1723 Год назад +2

      Schluter changed their story on that... now saying to use "All Set" for all applications.

    • @johnwhite2576
      @johnwhite2576 5 месяцев назад +1

      @@kurtbilinski1723yes it’s good for a thin set-BUT it still providing a sue fire waterproof bond between overlapping Kerdi membrane

  • @cj886
    @cj886 2 года назад +14

    Isaac
    I’ve always appreciated your honest and straightforward approach, glad to see you doing well brother, great job.
    -Carlton

    • @mzerk1021
      @mzerk1021 2 года назад

      Great video - I've been watching loads of them over the last 4-5 weeks - just starting to tile my bathroom and your video's have helped me immensely - and I appreciate your tone, insights and knowledge! Keep on, keeping on!

  • @karenpayne3946
    @karenpayne3946 Год назад +3

    Love your stuff you are dead on, I have been tiling for 35 years and one good point to make is never tile a backsplash over drywall mud ever, the GC doesn't even know it must be primed. Thanks Karen. Sealtite Groutworks Colorado!

  • @KyleDearth
    @KyleDearth Год назад +4

    I just started using Tri-Lite. Love that it's light weight and spreads easily. Just easy to work with compared to some other mortars I've used. My only gripe is the short open time. I essentially have to mix small batches because I learned the hard way, the stuff firms up pretty quickly. I'll probably try the Multimax Lite on my next job since it seems to have a much longer open time.

    • @marcgambone4240
      @marcgambone4240 Год назад

      Kera flex does the same thing and probably a little worse

    • @googleisskynet7312
      @googleisskynet7312 8 месяцев назад

      @@marcgambone4240 Keraflex is way cheaper though. So when I have to waste some, I don't feel so bad.

  • @flightlessboid
    @flightlessboid 3 месяца назад

    Straight to the point. Thank you. Every other video I looked at vacillates in their recommnends to the point where I had the same question(s) coming out as going in.

  • @orvsr4me2
    @orvsr4me2 2 года назад +4

    Very nice, coach. I haven't done the math yet, but notch trowels should just have a tile square inch rating to know where they are appropriate. I have also switched to the Schluter all-set for basically everything. A little more spendy, but it works great everywhere.

    • @professorkaos2781
      @professorkaos2781 2 года назад +3

      i absolutely hate all-set...its literally non-existent on big union sites after its initial launch. Many tried and most gave it up after a single order. You sir are one of a kind in my experience but if it works for you stick with it. If I had to pick an all-purpose mortar for floors I'd probably go with good ol' LFT mapei or Laticrete gold but for walls almost always Mapei Ultralite.

  • @whentosayifgoodorbad2948
    @whentosayifgoodorbad2948 Год назад +2

    I broke in soaking the tile. Everything was set in a fresh setting bed with neat cement. When thinset mortar first came out we were skeptical. My boss was very slow to accept it. I remember the original thinset was plenty sticky and had pretty good workability. In the Bay Area we called it Bond On. A few years went by and Custom came out with the recommendation to add a liquid polymer to the thinset powder instead of water for extra strength. It looked to me like they reduced or removed the original ingredient in the dry powder and sold the liquid as 'value added'. Marketing genius! They later tried recommending that the polymer be added to colored grout (with disasterous results) and quickly got away from that recommendation. It looks now like the industry has pretty much given up on liquid additives altogether. Thinset mortars are basically back to square one in my opinion.

    • @mathusvaiaoga9787
      @mathusvaiaoga9787 Год назад

      If only industry can go back to old school float and set. Lol.
      Everyone here in Florida uses crooked azz bend-a-board. Lol

  • @rrsblack2
    @rrsblack2 Год назад

    So glad I found this video. I've been combing the internet for alternative kerdi thinsets other than their own brand. Thank you!

  • @KJ_nyc
    @KJ_nyc Год назад +1

    Thank you! Thank you! Thank you! You are the first tile professional to mention 2" x 2" mosaic sheets (at 13:50). I've been trying to get specific questions answered but no one answers. So glad you offer private coaching classes. I plan to contact you there.

  • @stevenschuster
    @stevenschuster Месяц назад

    This was great!! Thanks so much.

  • @mond0133
    @mond0133 2 года назад +4

    Awesome very informative Thankyou!!

  • @AGueroAFuera
    @AGueroAFuera 6 месяцев назад

    Well done Isaac and class!!

  • @Aepek
    @Aepek 2 года назад +1

    Thanks! And keep going, even when things seem rough, cheers✌🏻

  • @omarbrown2416
    @omarbrown2416 Год назад +1

    Would you recommend Tri-lite for schluter membrane?

  • @ScottyLo
    @ScottyLo Год назад

    Some great information in this video. Thanks for sharing your knowledge.

  • @JeoP-b4n
    @JeoP-b4n 18 дней назад

    A friend of mine installed a tile size 12x24, over plywood and Ironmash, using a regular versabont thinset.
    You think will be a problem there?

  • @GM-xb6hy
    @GM-xb6hy 2 месяца назад

    Great content Isaac
    Quick question:
    I'm building our bathroom vanity in our new home and we're trying single piece of 3/8 porcelain (24 × 48) with vessel sink. How thick should I apply thinset and what size trowel? I'm putting it over 3/4 inch RTD plywood with 1/2 inch durock on top....much thanks!
    Great channel...Greg

  • @mariorrodriguez535
    @mariorrodriguez535 19 дней назад

    Is glue ok for tiles?
    I applied on a shluther a glue from Lowe's and didn't dry in days, now I removed and looking to apply something to dry faster

  • @gateslattes4686
    @gateslattes4686 Год назад

    Wish we had a guy like u here.
    Would have loved to take lessons from u

  • @bmarkie4103
    @bmarkie4103 2 года назад +1

    Coach I have a question about grout and thinset. First I am not a professional tiler. I have renovated two bathrooms for myself and the last one I did I keep getting a lot of thinset filling up the space between the tiles so I would to go back and scrape it out clean between the spaces. I got tired of doing that so I just used it like grout, smooth it with a damp sponge and let it dry . Well it came out pretty good although it was a little more sandy than sanded grout. It been a few years now but it still looks good with no cracks. Also this was done on walls not the floor. What is your opinion ?

  • @randolphmangosing9209
    @randolphmangosing9209 3 месяца назад

    What size of trowel is could use for 4x16 subway wall tiles?

  • @SkillfulScott
    @SkillfulScott 2 года назад

    Nice job for trowel size I always use whatever the thickness of the tile is

  • @harrypoker09
    @harrypoker09 Год назад +1

    What modified thin set you can recomend for tub surround cement board? ( before water proofing)

  • @erik1514
    @erik1514 2 года назад +9

    Really enjoyed this video. This is exactly what I needed to see to motivate me to tile above my shower insert. Thanks man!

  • @view05nys
    @view05nys Год назад

    I have a "Warmboard" radiant heating flooring, which has an aluminum surface. I want to tile over it, with a decoupling membrane below the tile. Requesting a recommendation on the type of thinset to use.

  • @bayareatrucking
    @bayareatrucking Месяц назад

    Hello hello hello. I want to attend one of your trainings. How may i do this.

  • @raymondjackson6069
    @raymondjackson6069 2 года назад +1

    Hello, I have a situation with an older house and I intend on redoing the tub surround. I have all the old tile down and intend on using Hardie Board as a backer. THe problem I have ran into is parts of the tub edge is so far from the stud, that the Hardie Board does not sit on it, and would actually slip behind it by about 1/8 to 1/4 inch. This would be the back wall. Then on the wet wall, the studs are actually against the tub edge, and when you put the Hardie board on it, it sits out proud the thickness of the Hardie Board. I know this can't be rare, but how do you handle this. Thanks and thanks for the video. I found it very instructive.

    • @davidbrown3602
      @davidbrown3602 2 года назад

      Fur out the walls and use a waterproof board

    • @raymondjackson6069
      @raymondjackson6069 2 года назад +1

      @@davidbrown3602 OK, fur it out for the gap, but what about the overhang. Then there is the tile that goes to the tup. Is it ok for it to hang in space with that gap between it and the tup wall, and grout at the bottom? Thanks again, pal!

  • @tiletheworld
    @tiletheworld 2 года назад

    Thanks for teaching good accurate information!

  • @johnwhite2576
    @johnwhite2576 5 месяцев назад

    Is Schlueter thin secret good for LHT tiles. ?

  • @vinhgolf
    @vinhgolf 2 месяца назад

    just see if you have any class in East coast or south Area.?

  • @420somewhere4
    @420somewhere4 Год назад

    I usually use the most expensive thinset in the store for floors and one notch down for walls.

  • @margaretbear
    @margaretbear 2 года назад

    Great basic info! Thank you.

  • @Illsky9
    @Illsky9 4 месяца назад

    Hey man, why don't you move to Florida so I can attend you classes, ha. 😛

  • @ronpilchowski9898
    @ronpilchowski9898 8 месяцев назад

    What size notch for 6"×25" porcelain on Kerdi board shower wall?

  • @frankiemartinez1755
    @frankiemartinez1755 7 месяцев назад

    Hey when do you or how do we enter these classes!? We would be happy to be there. 😅

  • @thekickingwolf5115
    @thekickingwolf5115 2 года назад

    This is gold! Thanks coach!! 🙌

  • @NickBen11
    @NickBen11 Год назад

    What about trowel size for a 2x10 subway tile? Supplier said to use an 1/8 x 1x8 but that seems pretty small to me, so I was going to try and check coverage and then maybe go with a 3/16” or 1/4”, if needed. Also does trowel size differ if you’re using an adhesive vs a thinset? I’ll be doing a backsplash in a kitchen. Thanks!

  • @jeffdupre6255
    @jeffdupre6255 7 месяцев назад

    what size of trowel for a 6x 24 plank wall application. also was wondering best thinset to put on kerdi membrane heated floor in shower.

    • @TileCoach
      @TileCoach  7 месяцев назад +1

      Probably 3/8” with a backbutter. Maybe 1/2x1/2” depends on how flat the tiles are.

  • @RawTakes
    @RawTakes 2 года назад

    I use white wall grout most of the time. works well with subway

  • @quarrystuart9243
    @quarrystuart9243 Год назад

    Great information thanks so much

  • @Dimakool
    @Dimakool 2 года назад

    Amazing videos boss, very informational ❤

  • @skdrcr
    @skdrcr 7 месяцев назад

    Do you back butter large tile if it's for the walls? And are you still using a half inch when you back butter?

    • @TileCoach
      @TileCoach  7 месяцев назад +1

      Usually just a skim on the back of the tile.

  • @kevingawelko6454
    @kevingawelko6454 2 года назад

    Good evening,
    Do you have any recommendations on some budget friendly software for someone who is starting up their business again.

  • @mcclurep77
    @mcclurep77 5 месяцев назад

    What brand of thinset do you use ?

  • @michaeltaylor3745
    @michaeltaylor3745 7 месяцев назад

    You didn’t mention 1/4” x 1/2” trowel. That’s my go to trowel.

  • @fordford21007
    @fordford21007 Год назад

    what is the best modified thinset for installing the RSS shower pan?

  • @MrStonedgolem
    @MrStonedgolem Год назад

    Hey where are you located? Really like your videos and been cranking out Tiffany work in Rockland county NY and Bergen county NJ for 10+years. Network?

  • @paulunger1798
    @paulunger1798 2 года назад

    Thanks for the video! Would anything change if securing kerdi board to a concrete wall? Still use modified?

  • @Dean5
    @Dean5 2 года назад

    Thanks for all you do, it is greatly appreciated. Is there any particular reason you recommended the Tri-Lite over the Multi-Max Lite? My bathroom is just about ready for tile and I have 5 bags of Multi-Max Lite and was going to use it to set my Laticrete Strata Mat on concrete, 12x24 floor tiles and 12x24 wall tiles. Thanks again and God Bless

    • @ssl3546
      @ssl3546 2 года назад +1

      Multi-Max Lite basically god-tier, it's amazing. (Only caveat - I don't think lite thinset can be used for heated floor installs.) MML is so sticky that it's actually a pain to clean the mixer paddles - normal thinset can just be spun in a bucket of water to clean but MML needs to be cleaned with a sponge.

    • @TileCoach
      @TileCoach  2 года назад +1

      Multimax is very good. We use it mostly for sheet membrane waterproofing. For setting tile it is good too, but it can be a little messy because it is so sticky. Just make sure to keep your tools clean. Tri-Lite is a little easier to keep clean while working.

  • @paradoxdea
    @paradoxdea 2 года назад

    There's a boatload of science & technology that's packed into modified thinset mortar. It dries as hard as cement, so if you're laying tile, please work fast, or it will set up hard.

  • @jbrady5979
    @jbrady5979 11 месяцев назад

    So you’d recommend LHT on top of Ditra membrane for an 18x18 granite tile?

    • @johnwhite2576
      @johnwhite2576 9 месяцев назад

      I’d just use laticrete s own decoupling membrane better cheaper and as it’s clear can confirm it’s evenly stuck without lifting for inspection

  • @Stevesbe
    @Stevesbe Год назад

    I use versabond for everything

  • @danielshallal6441
    @danielshallal6441 2 года назад

    Where are you located? To take course.

  • @Trahloc
    @Trahloc 2 года назад

    FYI truwerk is going to a 403 error, google kicks back truewerk.

    • @TileCoach
      @TileCoach  2 года назад

      Oops I misspelled it. www.truewerk.com. Code TILECOACH15. Thanks!!

  • @michaeledwards8215
    @michaeledwards8215 2 года назад

    I wish I could go to these classes but FL is a little far away from you.

  • @davidribeca1745
    @davidribeca1745 2 года назад

    I believe new york subway tunnel have 4 1/4 x4 1/4 tile installed on the walls in a running bond pattern. No sure hoe the 3x6 tile evolved.

    • @frankcatrini4816
      @frankcatrini4816 2 года назад +1

      when your speeding thru the tunnel, vision is slighty warped, so a 4-1/4 can look like a 3x6, lol.

  • @fooddude9921
    @fooddude9921 Год назад

    I was under the impression that Schluter's warranty is voided if you don't use unmodified.

  • @AnthonyFloresCPA
    @AnthonyFloresCPA Год назад

    We’ll done, I think you just need to use a brand new marker when teaching on the white board ;)

  • @spotonndiyvids6065
    @spotonndiyvids6065 2 года назад

    Hi Isaac what you do think of Custom Building Products VersaBond 50 lb. White Fortified Thinset Mortar it’s a homedepot product but the price of $13 is insane cheap but reviews are great I would like your professional opinion thanks.

    • @TileCoach
      @TileCoach  2 года назад

      I've used Versabond off and on for 20 years! We use the Versabond LFT for 12x24's.

  • @ericgonzalez9843
    @ericgonzalez9843 2 года назад

    Where are u located

  • @sgrasmick82
    @sgrasmick82 9 месяцев назад

    Is laticrete lht ok for using on Ditra? I see your video says schluter came out with their own modified but is stupidly expensive compared to lht
    Thanks!

  • @rizzotto139
    @rizzotto139 Год назад

    What is the ANSI or what mortar/thin set should I get from Lowe/hd ?
    Thanks so much!!!
    BTW
    I’m doing kerdi pan over basement concrete and plan on using that red cement board (have water proof of some sort) and kerdi ban with kerdi fix to pre seal all seems before kerdi ban.
    Opinion is greatly appreciated 😊

  • @MrTooTechnical
    @MrTooTechnical 2 года назад

    That is why megalite is the best. Woohoo

    • @TileCoach
      @TileCoach  2 года назад

      Very good thinset. Orange bags though :/

  • @wayneroach6736
    @wayneroach6736 Год назад

    Trilite

  • @asiridesigns5344
    @asiridesigns5344 Год назад

    What are your thoughts on building science corporation's article on stone and polymer modified thinset mortars and hydrolysis if an air gap isn't provided? buildingscience.com/documents/building-science-insights-newsletters/bsi-113-stoned

  • @mrscott01
    @mrscott01 2 года назад +1

    Definitely not TEC

  • @gsweater9172
    @gsweater9172 Год назад

    Modified, don't know jack about it, but gonna give a workshop on it. LMAO amateur.

  • @67Swepty
    @67Swepty 11 месяцев назад +7

    Can't tell you enough how great a dude you are for your knowledge and help in teaching the world this craft, Keep up the great work!

  • @fireace9045
    @fireace9045 Год назад +2

    Prolite from Custom, my all time fav for setting tile. But dont try it on Schlter Ditra, boy oh boy. Just doesnt want to bond

  • @jameskim2007
    @jameskim2007 Год назад +2

    Thank god I found tile coach, returning my Mapei uncoupling thinset the Lowe’s guy told me to use. Luckily I didn’t use it yet. Gained years of knowledge in 1 day of education from your RUclips

  • @bennisim7949
    @bennisim7949 10 месяцев назад +1

    Hi can you still use lht thinset for small mosaic on the shower floor? I don’t want to buy more than one thinset if I don’t have to. Thanks.

  • @khaledbelhaj
    @khaledbelhaj 2 года назад +2

    Great job my friend, I wish you success. I am also a professional in installing tiles and marble. I have 15 years of experience. I am from Morocco

  • @Matt-my7pz
    @Matt-my7pz 2 года назад +3

    Certainly appreciate that knowledge and experience put into teaching.

  • @plainsbowhunter1346
    @plainsbowhunter1346 2 года назад +2

    Love you channel Isaac. Keep up the great videos. Couple questions. Would recommend using a modified thin set under Kerdi membrane other than the Schluter brand? Also where can we get the bucket liners that you use? I’ve seen them in your videos before. Thanks

  • @bayareatrucking
    @bayareatrucking 2 месяца назад

    Hello Sir. Do you have in person trainings in Sacramento. I'd like to attend one. Not sur how much you charge but I'm interested.

  • @gemtianleon
    @gemtianleon 2 года назад +1

    I have a big doubt I will install 24x48 tiles on the wall above the bathtub in a bathroom, I ordered 2 Schluter Kerdi - 54 SQ FT for an area of 3x8 5x8 3x8 each Durox cement board wall above the bathtub, but I don't know if I should use this type of membrane Kerdi, redguard, or aquadefenc, I am very overwhelmed with so much information and I do not want the tiles to start to detach from the wall, what is your recommendation

  • @frankcatrini4816
    @frankcatrini4816 2 года назад +1

    quarter x quarter for 1 inch mosiacs? that could be a disaster imo. personally would use a V notch on most small sheet tiles and a 3/16 is a bit small, so i modify which ends up being like a 1/4 to 5/16 V. As for 6x6 tiles i think 6x6 quarry is a good candidate for 1/4 X 3/8, especially wire cut. I also find 1/2 X 1/2 trowel a bit small for anything longer than 3ft, i use a lot of 4ft or longer plank tiles and always back butter and the half inch trowel just is not enough in the center of the plank because of the bows, so i modify the trowel and deepen it to about 11/16 . you also have to keep an eye for wear on the trowels because it doesnt take long before a 1/2 towel to loose depth quickly from scratching concrete even with a Marshalltown, so im always modifying my trowels, keeping them at the proper depth with an angle grinder and blade. i use those cheaper type thick grinder blades (i believe they are like 1/4 wide) that come with a new angle grinder to modify my trowels .

  • @irisapartments8156
    @irisapartments8156 18 дней назад

    I've been using the tile adhesive from Lowes. How does that compare to what you use?

  • @MrKaaz
    @MrKaaz 2 месяца назад

    So what type and brand thinset would you use if you removed sheet linoleum from a concrete floor and were setting ceramic tile over a small amount of yellow-ish glue? I scraped the glue like crazy with 4" scraping blades and I'd say I got probably 80% or more of it up, floor is smooth. what's left seems like staining and trowel marks of glue that soaked into the concrete. What would bond to this type of floor?? Thx!

  • @Aepek
    @Aepek 2 года назад +2

    Awesome Isaac, one day would love to take a class just to take and pickup any tips that haven’t learned already; as THERES always something you can learn and improve upon, no matter how long been in biz, imo.
    Think it’s cool that you do thee classes to help ppl as well, not too many out there that do things like this, o keep it up.
    Cheers bro✌🏻

    • @TileCoach
      @TileCoach  2 года назад +1

      Thanks for the Love Aepek!

  • @tonycopelyn8730
    @tonycopelyn8730 Месяц назад

    What is a good thinset for 4x8 marbel tile

  • @joebinion1
    @joebinion1 2 года назад +1

    Great video with a ton of information,thank you for paying it forward,GOD BLESS

  • @mohdaiyan4242
    @mohdaiyan4242 2 года назад +1

    Please upload a vedio on full drainage systems

  • @carlosbrito7738
    @carlosbrito7738 2 года назад +1

    Thank you for this video. It cleared up some questions I had about thinset. Keep up the great videos.

  • @reyortiz5197
    @reyortiz5197 2 года назад +1

    what home depot brand thinset should I use for 12x24 porcelain tile for shower wall?. Prolite Premium large format?

  • @mainenorthwoodshunter3265
    @mainenorthwoodshunter3265 4 месяца назад

    Hello, I have a camp that I want to make a hearth for. The bottom is 5' by 5' and the back will be 5' by 6'. Do they have a pre-mixed motor that I can use? I am a paraplegic and my camp does not have running water so I am trying to find the easiest way for me. I plan on using 12" by 12" slate tile. This is all for a wood stove to sit on and have back wall protection. Are there any calking gun alternatives? All and any help is greatly appreciated. Thank you!

  • @squeekhobby4571
    @squeekhobby4571 2 года назад +1

    Great lessons. If we put tiles over radiant floor ( concrete floor) what do you recommend, modified or unmodified

  • @C2IT678
    @C2IT678 3 месяца назад

    😅😅😅😅😅😅

  • @Jubileejones
    @Jubileejones Год назад

    Is Sturdi Flex a good thinset for shower? 12 x 24 tile and foam shower pan.

  • @filcandiy
    @filcandiy Год назад

    thanks for explaining it helps me a lot ! that's my question all the time about the modified and unmodified, now you explained here very clearly! thanks 🙏👍

  • @sonofigoo
    @sonofigoo 3 месяца назад

    Thank you for your videos they are very informative. Our local tile store sold me laticrete 317 unmodified thinset to use with schulter membrane which I installed. You mentioned no need for unmodified? They also indicated I could use 1/4x1/4 notched trowel for 12x24 tile on shower wall. Wondering about the implications of using 1/4x1/4 vs. your recommendation of 1/2x1/2 notched trowel and using unmodified thinset. My walls are fairly flat with (1/8" tolerance)

  • @matthewholmes8638
    @matthewholmes8638 6 месяцев назад

    Can you use Tri lite under the pre sloped kerdi pan? Also can you use the multimax lite for the kerdi pan? Also what is the difference in tri lite and multimax?

  • @bobbys2160
    @bobbys2160 Год назад

    Do I need a membrane on the walls if I use hydroban on hardibacker walls. I will use a membrane on the shower floor sealed with hydroban

  • @Dennis-kj9qx
    @Dennis-kj9qx 10 месяцев назад

    Do the 12x24 tiles using the 1/2x1/2 trowel need to be back buttered ? ...ANYONE ?

  • @alieb580
    @alieb580 6 месяцев назад

    Finally all my questions are answered, amazing video thank you so much for explaining this

  • @muskateer10
    @muskateer10 Год назад

    I am having extreme trouble finding a thinset that will work with my kerdi membrane to ceramic tile. All the recommendations just do not seem to be available in ND. Any suggestions on a more common thinset to use? AllSet not available; Laticrete Hydro Ban - not available, etc. We have Homedepot, Menards ,and Lowe's in the area. None of them have the recommended.

  • @danielolson437
    @danielolson437 Год назад

    I've been using too small notched trowels. The largest I ever used was 1/4 x 3/8... and that on 24x24 tile. Too much work to get adequate and even coverage. This should make a significant improvement on time.

  • @basilbcf
    @basilbcf 7 месяцев назад

    I'm getting geared up to redo our shower/bath and was planning to use Kerdi. This has been very helpful!

  • @dianeunderwood3836
    @dianeunderwood3836 Год назад

    Have no idea what my contractor used on my tile floor over Ditra membrane because my tiles crack even when a very light object drops on it like a knife. Four drops, four cracks. Perhaps the type of the thinset was incorrect.

  • @lillithjones993
    @lillithjones993 Год назад

    I need to re-apply a tile that has a new section of plywood. There is no room for backerboard in order to make it level with all the other tiles. It’s in the corner of a closet on the other side of the water heater so I would like to waterproof the plywood with some aqua defense. Will Mapei modified thin set dry on top of a waterproof membrane needing air or is it going to dry via chemical reaction?