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Unread 10-22-2012, 05:41 AM   #16
HS345
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Quote:
Originally Posted by Wes
I wanted to see if anybody else has tested this.
I refuse to use hardie because when it first came out it would expand and dissolve when exposed to water.

Have they made changes to the product or is it still the same waste of time and money?
Hardibacker "came out" well before 2004 Wes.

I'm with CX, I gotta see this. Until then, I'm calling BS.

Since you went to the trouble of placing Wedi and lath in buckets of water for your experiment, surely you documented this. Do you have any proof whatsoever of the board dissolving?

Quote:
Originally Posted by Wes
We put hardie, concrete board, wedi, and lath in buckets of water.
Try it and see what results you get.

Concrete board wins.
Since "concrete" board won, what happened to the Wedi and lath? Did they dissolve too?
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Unread 10-22-2012, 08:15 AM   #17
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i know i'll get killed for saying this but i worked at home depot for a summer in college. all the stores have a piece of hardie encased in water (as someone mentioned earlier) to show how water doesn't affect it at all. the one at the store i worked at had been there for over 4 years...
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Unread 10-22-2012, 09:16 AM   #18
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I can find you one of those sample "jars" that's more than 15 years old, Pfeff, with the same result.

Serious questions have been raised in past as to whether a piece of the material hermetically sealed in distilled water is a good test, but my own real-world, year-long test was done with very hard well water and was open to airborne dust and dirt and such. Certainly not laboratory conditions at all.
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Unread 10-22-2012, 10:30 AM   #19
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If I get a customer who demands hardie, or find a scrap I will cut it and do it again.
It's possible a co-worker could have put something in the water to mess with us.

Being exposed to rain, is much different than being totally submerged.


Yes we tested all 4, the wedi looked normal, but in the bottom of the bucket we had a lot of blue wedi? Maybe from inside the board or something.

Lath rusted of course.

The durock Held a lot of water.

Permabase left begin some perlite floaters and a few fiberglass.

And Wonder boards sticker finally came off.



This wasn't a lab. It was buckets in a back room of a tile store.
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Unread 10-22-2012, 03:11 PM   #20
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You tellin' me it rains in Western Coastal Canada, John? Next thing, you're gonna say it rains in Western Washington (where I was born).
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Unread 10-22-2012, 06:56 PM   #21
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Quote:
Originally Posted by John Bridge
You tellin' me it rains in Western Coastal Canada, John? Next thing, you're gonna say it rains in Western Washington (where I was born).
Heh, you should try putting a mountain directly behind the city. Piles things up real nice, wouldn't want any of that liquid sunshine passing us by

I really cant complain this year though. Its been absolutely awesome weather since summer
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Unread 10-23-2012, 05:07 AM   #22
tilemanct
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Every shower repair that involved Hardie Board was the same. Board "shaled" and split in half. Mold was in the center of the board. Half of the board stuck to the tile, the other half remaining on the studs with mold in between.
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Unread 10-23-2012, 04:22 PM   #23
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Thank you Bob,
My terminology was from my 8th grade Earth Science Class. (Along time ago!)
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Unread 10-23-2012, 08:37 PM   #24
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I do recall problems with delamination several years ago, maybe as many as ten years. There were times when I cut Hardi-backer into four-inch-wide strips and then pried it apart with a margin trowel. The thinner strips worked well for packing out thinner borders, etc. As far as I know, those problems were resolved years ago, and besides, they had nothing to do with the material "dissolving" in water.

Are there any pictures of this experiment?
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Unread 10-23-2012, 09:05 PM   #25
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I ripped apart a shower that was 7 yrs old somewhat recently. was a typical bad install the bottom 4 in of the hardi walls had been saturated for probably about 6.5 yrs. The hardi was fine, moldy on the front, back and middle but not dissolved or delaminated. I'm of the opinion that the mold was not the board itself being eaten but a result of the water carrying nastiness, some of which was left behind as it traveled through the hardi.

My only beef with hb is the crazy fast rate at which it sucks the water out of your thinset.
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Unread 04-07-2014, 01:33 PM   #26
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I left bunch of hardi backer outside, left over from an old project years ago, which went through many rains and sun. I don't see any change to them at all.
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Unread 04-08-2014, 11:01 PM   #27
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just to add to this as i dont know if you guys get white green e board
its like smooth on one face and a cloth fabric on the other

well i can tell you this board does fall apart had some left outside on the deck
and during are brief winter more rain than snow a only a few weeks of below freezing temps it completely started disintegrate
all so my hardie off cuts same or more time left outside are still solid to this day

but most of my shower /bath board installs are red guarded or hydro banned
even dens-shield installs which most drywallers here prefer
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Unread 04-08-2014, 11:31 PM   #28
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Thanks for that John.

I use greeneboard quite often. It says on their website it can be used outside, but this gives me doubts. Maybe Ill switch to hardy for this one.
Have some tumbled? Granite stone to put up. Going to go cbu over rainscreen + hydroban + 255 multimax.

Btw, ive never noticed the green e board deteriorate, but I cant recall seeing it soaked. Ill have to toss a scrap outside where it will surely remain soaked in our "spring" weather..
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Unread 04-09-2014, 06:19 AM   #29
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Hey, this thread is supposed to be about Hardi-backer.
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Unread 04-09-2014, 08:47 AM   #30
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Sorry John
Ill throw a piece of hardy backer outside too! Better?
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