Hardibacker Down, Ready For Tile-wait?

buildenterprise

I just finished up laying the 1/4" backerboard at 7 pm, bedded down in mortar over 3/4" plywood.. Should it sit for a day or can I start tiling in the morning?

angus242

It's kinda hard to go against manufactures recommendations. If you follow them, chances are very little for something to go wrong.
OK, I know if I don't ask someone else will.......you did screw it down (or nail), right?...

JazMan

You can start installing the tiles as soon as you've finished fastening the CBU. Don't forget the mesh tape on all seams.

Jaz

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KERDI Shower
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buildenterprise

Yes, I used 1 1/2" ring shank nails in my Hitachi coil nailer. Worked like a charm! I tried using the backer screws but they were splitting the edges of the boards when I tried to screw them down flush.
I don't know how you tile guys do this day in and day out. Is that why tilesetters retire so young? I'm whooped! Well, I did put in a 12 hour day, laying all the 3/4 ply then all the cbu.

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Graeson

up and down, up and down - I'm getting bionic knees installed next month!

cleveman

The biatch about floors is that they are down so close to the ground.

Ceramictec

Imagine if you did 1/2' !!

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-Brian-
Brandon Lutz Bradenton Tampa Oldsmar Westchase New Port Richey Seminole St. Pete Wesley Chapel Sarasota
website: www.ceramictec.com

Bill_Vincent

Ummmmm, you might want to rethink using ringshank nails in the future. Them little bitty heads on those nails aren't hardly enough for holding down CBU.

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buildenterprise

Ummmm, ok.

kevjob

hardy backer wants either the screws or galvanized roofing nails because the of the head size.

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Kevin
Basement Finishing Highlands Ranch Colorado
Littleton Colorado, Basement Remodeling
Kitchen Remodeling Denver

buildenterprise

I understand, but where is it going to go? It's mudded down to the subfloor. I can see the necessity of using screws on wallboard.
Took me all day but I got 'r done.

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Bill_Vincent

Keep in mind-- the mortar between the CBU and the subfloor isn't there to bond the two surfaces together, nor is it expected to. It's there as a cushion.

Nice looking floors, though.

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"Whether you think you can, or you think you can't, you're probably right."

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JazMan

I know you didn't mean to say cushion. Also, most CBU makers recommend using modified thinset, and so it does bond the CBU to the subfloor.

Jaz

__________________
Tile 4 You llc
KERDI Shower
specialist...DITRA Installs...
www.tile4you.com

Bill_Vincent

Actuallly, I DID mean to say cushion, and regardless of whether it's modified or not-- I don't know about your area, but around here, most of the subfloors are Advantec. K/K won't stick to it, much less anything else. It's not there to bond one surface to the other. Ask your area rep. Just for the record, TCNA recommends UNmodified, even if they qualify it by deferring to manufacturer's recommendations.

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"Whether you think you can, or you think you can't, you're probably right."

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Dan_Watson

http://www.fcimag.com/CDA/Archives/b...100000f932a8c0____

Dan_Watson

and i forgot to ask for a clarification of 'cushion'?

buildenterprise

Should I bother sealing the tile before grouting? I'll be using a pretty neutral color grout, something light gray or ivory to blend with the tile.

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Bill_Vincent

If you go to the article you cited, you could use it as a substitute where they use the word "bedding".

You're already holding one panel to the other by means of screws or nails. The thinset is to eliminate the paper thin void that would otherwise exist between the layers, causing a minute vinbration that would shorten the life of the floor. The very last thing you want to do is bond one layer to the other. Do that, and you've basically created a single layer, and eliminated all the benefits of a multi-layered floor, which is why TCNA goes against manufacturer's specs recommending the unmodified thinset.

Over at John Bridge's site, someone put it very well-- screws hold the cement board down, while the thinset holds it up.

BE-- it depends on how absorbant the stone is. Polished stone usually doesn't need to be presealed.

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"Whether you think you can, or you think you can't, you're probably right."

http://www.creativeceramicandmarble.com