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DaveRicheson's picture

What do you tape the joint of Durock to a drywall ceiling with?


I've used the mesh tape on the walls seams. It doesn't seem right for that inside corner, where the cement backer board meets the ceiling.


I thinking paper dw tape and quickset  jc like Durabond. Finish off the ceiling, then lay up the tile to it using thinset.


Anything wrong with my thinking here?


 


Dave

(post #105122, reply #1 of 17)

Mesh. They move at different rates and paper could tear.


 


 


oops. I might be wrong, I was going from memory of a long ago job.



Spheramid Enterprises Architectural Woodworks


"If you want something you've never had, do something you've never done"


Edited 11/6/2007 6:57 pm ET by Sphere

www.richmondrenovationsandrestoration.com  

(post #105122, reply #2 of 17)

 


gotta be mesh for durock/thinset mortar      the regular sheetrock mesh gets eaten up chemically by the mortar     the portland can leach thru the tape, even if it's bedded in joint compound first and the joint is dry  


 


"I'm not responsible for my actions."


 

"I'm not responsible for my actions."

 

(post #105122, reply #5 of 17)

I've used the Durock mesh tape on all the joints except the ceiling to wall  joint.


I'm not a fan of mesh dw tape anywhere, and corners are a garrentied failure point with that junk IMO. The cement board fiber tape doesn't feel much different to me, maybe it is, I just don't know.


The tile will butt right up to the ceiling so any crack in the corner will be hidden by the tile. I just don't want a crack at all, even if I can't see it!


 


Dave

(post #105122, reply #7 of 17)

never knew that. thanks

"it aint the work I mind,
It's the feeling of falling further behind."

Bozini Latini

www.ingrainedwoodworking.com

"it aint the work I mind, It's the feeling of falling further behind." Bozini Latini www.ingrainedwoodworking.com

(post #105122, reply #3 of 17)

Dave,

Paper tape and Durabond will work just fine. I have done it many times with great success.

Bill

(post #105122, reply #4 of 17)

Anything wrong with my thinking here?


No, you're right on the money.


 

 

"When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking." — Sherlock Holmes, 1896

(post #105122, reply #6 of 17)

Thanks for the endorsement.


I gonna run them in Durabond 45 in the morning. I'll finish out the ceiling side of the joint, but leave the cement board side with just the bed coat and tape. There should not be enough jc and tape on the cement board to have any adverse affect on the tile.


 


Dave

(post #105122, reply #8 of 17)

I don't use mesh tape in corners when they will be finished, only if I am tiling over, then I usually stick it on and coat both sides at once with thinset.


I find a heavy weight BLUE mesh at Depot. Works nice.


 

 

"When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking." — Sherlock Holmes, 1896

(post #105122, reply #10 of 17)

DW picked up the mesh tape for the cement board at Lowes a few weeks ago. The package says it is for cement board, but it looks like and handles just like the self- adhesive dw mesh tape.


I just can't trust the stuff after having multiple failures with the dw mesh tape.


I'm not to concerned about the flat joints on the cement board. It is 1/2" durock over 16" o.c. studs.


I taped the ceiling joint this morning with paper tape and durabond 45. My goal was to create an airtight seal at that joint. The tile surround is for a dog wash station, and I don't want any moisture migrating into the attic and the cellulose insulation up there.


 


Dave

(post #105122, reply #11 of 17)

This is actually for all that would use paper tape behind the tile.

Why?

I really don't know because I have done very little tile work.

But it seems to me that intentionally placing anything paper under tile and grout in a wet/humid environment is just asking for problems.

where is my thinking wrong?


They can't get your Goat if you don't tell them where it is hidden.

Life is Good

(post #105122, reply #13 of 17)

If you are talking about the above Daves post, notice he only used it in the corners at the ceiling.


Do you believe that area will see much more humidity than some other part of his bathroom that is paper taped with paper faced gypsum board?


 

 

"When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking." — Sherlock Holmes, 1896

(post #105122, reply #14 of 17)

Good Point.

I will have to think about that.


They can't get your Goat if you don't tell them where it is hidden.

Life is Good

(post #105122, reply #16 of 17)

I'll see if I can post some pics of this thing when I'm done. It is a dog wash station in the new kennel building/studio I'm finishing for DW.


I came across a 25x72" stainless steel sink from a photo processing lab several year ago. It is only about 6" deep, so it may not be deep enough for her. I also bought a faucet with a spray hose hookup, like you see in commercial kitchens, for her to use.


If you have ever bathed a dog, you know  how much water is going to get slung around. Fortunately she has short dogs, so I don't think they will get the ceiling or top area of the tile surround wet.


I haven't set any  tile in the last 15 or more years, and this will be my first  experience with cement backer board. DW is a perfectionist to the 9th degree. (I thought I was picky untill I married her.)


I'll likely have more questions as I go along, so keep your ears on for me.


 


Dave


 


Dave

(post #105122, reply #15 of 17)

Exactly what Eric said. It is only a few inches at the ceiling. This is not a steam shower, or the ceiling would be tile on CBU to handle the moisture.

Bill

(post #105122, reply #12 of 17)

I just can't trust the stuff after having multiple failures with the dw mesh tape.


If you are talking about failures you have had using mesh on drywall.............did you set it or first coat with taping compound or d-bond?


It's a no no to set mesh tape with compound, it has been discussed at some lenght here.


Eric


 

 

"When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking." — Sherlock Holmes, 1896

(post #105122, reply #9 of 17)

I use Straightflex tape and Durabond

 


 


 


 


The awful thing is that beauty is mysterious as well as terrible. God and the devil are fighting there, and the battlefield is the heart of man.
- Fyodor Dostoyevski

 

 

 

 

The awful thing is that beauty is mysterious as well as terrible. God and the devil are fighting there, and the battlefield is the heart of man.

- Fyodor Dostoyevski

(post #105122, reply #17 of 17)

caulking ... if anything.


then cover that with tile ... then caulk the tile as per the norm.


Jeff


    Buck Construction


 Artistry In Carpentry


     Pittsburgh Pa

    Buck Construction

 Artistry In Carpentry

     Pittsburgh Pa