My install has begun... Now for a few questions.

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naehring2000

naehring2000

New Member
Feb 12, 2012
67
North Shore, MA
Hi everyone, I finally got my Micore in and started my install tonight. As you can see in the pictures I have 2 layers of Micore and durock, my question to you is what do you think the best way to attach durock to the edge of the micore would be? I will be wrapping the edge in tile. I am beyond minimum hearth size, so could I liquid nails the durock to the micore?


filling in the hole left by my other hearth for the gas stove.

IMG_0081.jpg


2 layers of Micore 300 nailed down.

IMG_0082.jpg


Durock down and seam mudded (just for peace of mind)

IMG_0084.gif
 
Nice.. Looks good. The 13 seems to be a solid choice around here. Having the Pellet stove increases the chance of not needing Oil, LP, Electric, Etc...

Looking forward to the finished product.
 
Thanks, ya I can actually heat the whole house with the Harman, This is for the sun room specifically so I can get all four seasons out of it, I don't plan to heat it 24/7, just small fires at night until bed, so lots of cold starts.
 
Wow, i'm surprised I had no opinions on this, so my next question is, do you think liquid nails would off gas if I used it to adhere the backboard to the Micore?
 
naehring2000 said:
Wow, i'm surprised I had no opinions on this, so my next question is, do you think liquid nails would off gas if I used it to adhere the backboard to the Micore?
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Sorry, but I'm a little bit lost. It appears you've already adhered backer board to micore, no? Did you use Liquid Nails? I would think use of Liquid Nails or any organic adhesive would be a big no no in a heat situation such as your hearth. There is really no other good way to adhere the two dissimilar layers. Nailing/screwing through all layers to subfloor is the best you can do in this situation.
 
Thanks for the response WoodNStuff, I actually meant adhering small strips of backerboard to the perimeter vertically (to put bullnose tiles for trim), but have since decided to trim it out with wood, and no I didn't use construction adhesive on the backerboard, I screwed it into the sub floor.
 
naehring2000 said:
Thanks for the response WoodNStuff, I actually meant adhering small strips of backerboard to the perimeter vertically (to put bullnose tiles for trim), but have since decided to trim it out with wood, and no I didn't use construction adhesive on the backerboard, I screwed it into the sub floor.
Click to expand...

Excellent. One thing you could have done to get a cementitious edge through all the layers would have been to make a 4-6" wide strip around the Micore board and then cover the Micore and cement backer board edge with your top layer of backer board.
 
I would use longer screws and screw the durock through the micore directly to the wood below it. Note that durock recommends a screw every 8".
 
Close to the fireplace I would use screws. It's not so much an off-gassing issue, but more of a flammability issue.
 
Somebody chime in if you don't think this would work, but I'd be inclined to just parge the edges of your hearth sandwhich with thinset and skip the durarock. I did that on mine, but I didn't add any tile or stove veneer to the edge, so I can't vouch for that working. But, I can tell you that thinset sitcks like a mutha to the edges of durarocka and micore. I can't see how it would present a problem for the finish adhering as well.
 
ploughboy said:
Somebody chime in if you don't think this would work, but I'd be inclined to just parge the edges of your hearth sandwhich with thinset and skip the durarock. I did that on mine, but I didn't add any tile or stove veneer to the edge, so I can't vouch for that working. But, I can tell you that thinset sitcks like a mutha to the edges of durarocka and micore. I can't see how it would present a problem for the finish adhering as well.
Click to expand...
In My Experience (IME) thinset doesn't flex that well and may crack or craze with the temperature differentials.
 
madison said:
? Are you covering the rear wall/windows? Sorta seems the stove is going to be close to that area AND that is going to suck alot of heat off the stove?
Click to expand...

It is what it is with the windows, I know i'll lose alot of heat, the whole room has windows like that. That's something i'll have to deal with to get 4 seasons of use out of my sunroom.

Thanks again everyone for the input, however I decided to just trim the perimeter out in wood.
 
Will the stove have the rear and side heatshields? That would help with concerns about the glass. I would also connect with double-wall pipe for the same reason.
 
BeGreen said:
Will the stove have the rear and side heatshields? That would help with concerns about the glass. I would also connect with double-wall pipe for the same reason.
Click to expand...

It comes from the factory with the rear welded in place, I wasn't planning on putting side shields on though.... Should I? What would be the benefit?
 
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