Ardex 740 Flexbone uncoupling membrane Install

[@cvalla7343]

Thanks Sal, you are worth your weight in gold. Your videos are the best I have found and have referenced them often. Just laid 12x24 tile in kitchen....you made it do-able. I used Ditra, you were right on with your instructions. If I were younger I'd consider it as a vocation...but boy was it ever a work out. Thank you for EXCELLENT videos.

[@SalDiBlasi]

+C Valla Installing tile for a living is hard work, but someone has to do it.

[@LandbergTileTV]

This looks much more flexible than ditra...maybe for small spaces like this is best?

[@Mrdubomb]

I have to level my plywood floor, its got a good half inch dip in the middle and some lippage from sheet to sheet even though its T&G. I plan on going 5/8 underlay on top of 5/8 subfloor to get a good solid base. Should I use self leveling cement between ply sheets, or on top of the underlay before uncoupling membrane. This may be a dumb question, but can you mix different uncoupling membranes having them butt up with each other?

[@SalDiBlasi]

Not a good idea to mix different brands of membranes, stick with one. Check what you need for a subfloor for your application, here is the ditra handbook, pdf.lowes.com/installationguides/4011832035982_install.pdf Self leveler goes under the membrane, not between plywood sheets. Some spot patching may be all you need. kzbin.info/www/bejne/d4Cmq5x6n5uBac0

[@specter6182]

I have used detra and strata mat also prova. usg makes a nice one but whats your height on it after tile and how thick is the tile? I am doing a floor and need to go as low as possible bit I don't prefer the mapei Crack isolation mat I need to go thin match up to some floating plank

[@Toolstilediy]

Is this cheaper than ditra and strata?

[@Mrdubomb]

When installing flex bone on plywood do you use modified or un modified, the entire plywood floor has been primed with a sika primer and patched with self leveling cement in various spots

[@SalDiBlasi]

Watch this kzbin.info/www/bejne/iWmTeImdab5ng7c

[@samados1]

I use a radiant heat mat on my wood floor, I use Ardex x5 thin set on the bottom of the mat and also for the 12x24 porcelain tiles . One year later I got called back the tiles are moving not cracking, if you walk on the floor you can feel the tile separating from the thin set i picked up the tiles the thin set bed is a little thick maybe 3/4 to and 1” in some areas, and there’s cracking all over the thin set mortar bed! The guys did set the bed in blobs of thin set then push the tiles down into the thin set where did we go wrong?

[@SalDiBlasi]

There is your problem, the spot bonded the floor, a big mistake, it will always result in a failed install. kzbin.info/www/bejne/f5nMmJp9qMlkiLc

[@eamonnmcstravick2721]

Sal do you not need to leave a gap around the perimeter ?? With this one The one I use tells me to leave a gap

[@SalDiBlasi]

Always leave rome for movement.

[@youtoob8166]

Isn't using fc tiles underlay and a good glue cheaper and stronger

[@SalDiBlasi]

❓❔

[@baltazarromero9772]

can it be installed directly to the subfloor ?

[@SalDiBlasi]

+Baltazar Romero Yes, that is the point of an uncoupling membrane.

[@richardvera9946]

Do you recommend this membrane for floor installed mosaic tile

[@SalDiBlasi]

All thew uncoupling mats work the same way, they all have a minimum tile size limitation. so check if you tile is suitable for the mat.

[@richardvera9946]

@@SalDiBlasi I forgot to mention I have linoleum as my subfloor and plywood under that. I was looking at the ardex 740 didn't see a minimum size the only downside is I have to remove the linoleum in order to attach membrane to plywood

[@SalDiBlasi]

It is probably true that you need to remove the linoleum no matter what you do.Might have to also remove the plywood underlayment if it is Luan or only 1/4". Get back to the subfloor.

[@coreyadams1982]

So is it any different than schuter ditra?

[@SalDiBlasi]

+Gumbo Jambalaya Today there are many difference uncoupling mats.

[@kyletornquist9999]

Sal, what is your preference after using both?

[@SalDiBlasi]

Kyle Tornquist Only used the flex bone once, but i think it will depend on the circumstances of each job.

[@randymathews3348]

where are the new knee pads??

[@williamdewey9568]

Ardex doesn't show the thinset being used on substaight. They just show it as a floating overlay.

[@williamdewey9568]

Never mind I was looking at the 720 floating system.