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-   -   Thinset over greenboard?? (https://www.johnbridge.com/vbulletin/showthread.php?t=65974)

01sesedan 08-30-2008 11:58 AM

Thinset over greenboard??
Been searching but couldn't find what I was looking for.

I'm about to install 12x12 tiles on the walls of the bathroom but I think I screwed up. I installed greenboard on all the walls, except the shower...that's all Durock.

I'm planning on bringing the tiles up about 48" from the floor but I finished it with regular compound. Will thinset (Customblend Standard Thin-set Mortar) work? According to this it indicate it will. Your thoughts......


If not, what type of thinset do you recommend?

If it can be used. Will have have to seal the walls first? OR just set the thinset on top of it?

How about Mastic, will this work.


Mike2 08-30-2008 12:47 PM

Joe, return the CustomBlend and pick up some VersaBond instead. You can use it directly on greenboard but if you have seams finished with compound, I'd recommend you prime those first.

Mastic could be used outside the shower, but I'll not recommend it. VersaBond is ideal for your project.

01sesedan 08-30-2008 02:58 PM

Do you thing, removing as much compound will also help?

Mike2 08-30-2008 03:02 PM

Joe, assuming this greenboard is outside a shower or a combo tub/shower, I'd leave the drywall compound as is but apply a good coat of primer over it. Let dry, then tile.

01sesedan 08-30-2008 04:44 PM

Will any primer do? I've seen Behr, Kilz and Glidden Gripper. I've used Gripper and seems to work but which to you guys perfer?

Greenboard in surrounding area, Durock inside shower...


Mike2 08-30-2008 04:52 PM

I happen to like Zinsser 1-2-3 but I tell ya Joe, for your application I think any of those you mention will be just fine. All you need is a coat of primer to eliminate the possibility of your thin-set re-emuslfying the drywall compound. Doing that does not require a high-tech, stain sealing coating.

01sesedan 08-30-2008 05:02 PM

Thanks again...

Will be heading to HD to pick some up and some thinset. Hope to be able and start tiling tomorrow...

01sesedan 08-30-2008 07:14 PM

Was talking to some people and I'm being recommended Jamo GTS thin set. I assume the Versabond thin set is better, correct? Not sure way I'm told they are all the same, something doesn't seem right.

What's your take, could your guys tell me the difference?


Mike2 08-30-2008 07:22 PM

Joe, I for one have never used, or seen Jamo products. While Jamo is owned by Custom Building Products, makers of VersaBond, I think Jamo might be an east coast, Florida thing. Maybe someone else will come along with the actual experience.

VersaBond on the other hand I've used many times. That I know is a good product for a project such as yours.

cx 08-30-2008 07:54 PM

What Mike said.

We hear about Jamo products now and then, but I've never actually seen any. And I just don't know what is what in that line.

And except in the Northeast, everyone seems to be happy with VersaBond and has been for many, many years. Good, consistent, easy to use pookey, that. :)

My opinion; worth price charged.

jdm 08-30-2008 11:49 PM

I'm in the Northeast, and I believe that VersaBond works the same here as it does everywhere else :)

I see it rolling out of Home Despot all of the time.

01sesedan 08-30-2008 11:51 PM

Versabond must be better. It goes for $12.xx per bag. Jamo GTS, $4 per bag. Somethings up... I don't want to go cheap and end up with problems in the future...

Just wanted to make sure there was an advantage/benefit...going with Versabond. Didn't want to end up paying more, if they were the same with different name...

jdm 08-31-2008 12:17 AM

A peek at Jamo's website reveals that GTS is an economy unmodified (no latex additives) thinset. It's OK at best, as economy means cheap, and cheap meas that there is a minimum of portland cement in the product.

VersaBond is a modified thinset. It contains both latex additives that improve the properties of the mortar, and a reasonable amount of (expensive) portland cement.

And, at least in white, VersaBond is JB's favorite.

01sesedan 09-01-2008 02:41 PM

Was able to put full tiles on most of the walls. Now I have to start working on the cut tiles. Got most of the joints on the Durock completed, ran out of mesh tape.

I have to give you guys props... This is some serious work. I've tile off and on for some time but man, it is back breaking work. Guess I'm not use to it. No wonder, here locally it cost about $2 a sqft just to install. The amount of prep work and actual work that's necessary is alot.

I'm doing it all by myself and taking my time. But in the end it's all worth it when you see the project completed. And feel the pride of having completed the job... Also, the amount of money that is saved.

Thanks to everyone who replied and to the forum. I would have been lost without it..

Thanks. Again...

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