Ceramic Tile Advice Forums - John Bridge Ceramic Tile

Welcome to John Bridge / Tile Your World, the friendliest DIY Forum on the Internet


Advertiser Directory
JohnBridge.com Home
Buy John Bridge's Books

Go Back   Ceramic Tile Advice Forums - John Bridge Ceramic Tile > Tile & Stone Forums > Tile Forum/Advice Board

Sponsors


Reply
Thread Tools Search this Thread
Unread 06-20-2019, 01:43 PM   #1
deb_ohio
Registered User
 
Join Date: Jun 2019
Location: Columbus, OH
Posts: 2
Tiling over micore 300 (indirectly) for fireplace surround

Hi all. Long time lurker who learned much about bathroom tiling from reading your forums. Thanks so much to members about that!

We have removed an old crappy fireplace and installed a new direct vent. Per install instructions we used micore 300 mineral fiber board as a noncombustible backer.

Now onto the finishing. We will be using 3 x 6 marble tile with unmodified thinset.

What is the best option to use on top of the micore board - Durock or metal lath with a scratch coat of type S mortar? Why?

If anyone has done either method, please share your experiences!
__________________
Deb
deb_ohio is offline   Reply With Quote
Sponsored Links
Unread 06-20-2019, 06:27 PM   #2
Davy
Moderator -- Mud Man
 
Davy's Avatar
 
Join Date: Jan 2003
Location: Princeton,Tx.- Dallas area
Posts: 31,758
Hi Deb, welcome. It depends what the marble tiles look like. Can you post a pic of what you have? Usually, the cement board would be best for 3x6 tiles.
__________________
Davy

www.davystephenstile.com
Davy is online now   Reply With Quote
Unread 06-20-2019, 08:25 PM   #3
cx
Da Home Builder
 
cx's Avatar
 
Join Date: Jul 2001
Location: Boerne, Texas
Posts: 88,415
Welcome, Deb.

I think you'd do best to contact USG for a specific recommendation on that. They do not recommend tiling over the Micore 300 and I expect that would apply to using it as a backing material for your proposed mortar bed, but I don't know that for sure. And I know they don't publish any installation method for applying their Durock cement board over such a backing material, nor would any other CBU manufacturer.

I'm curious about your stove/fireplace installation (could we have a make and model there?) requirements. If the specification was for a "noncombustible backer," I'd think the Durock would suit that purpose as well as being a suitable backing material for your stone tile as Davy has indicated.

My opinion; worth price charged.
__________________
CX

Y'ALL NEW VISITORS READ THIS HERE!

Last edited by cx; 06-20-2019 at 10:39 PM. Reason: typo
cx is online now   Reply With Quote
Unread 06-20-2019, 09:26 PM   #4
deb_ohio
Registered User
 
Join Date: Jun 2019
Location: Columbus, OH
Posts: 2
Davy, here are pictures of our fireplace install and the tile. It is statuary marble.

The tile is on the stove because I just baked it. While I ordered a honed finish what I got is a semi polished and I wanted to make sure there was nothing on it that would change color on high heat.

CX - our fireplace is a Mendota FV34. I think it puts out almost 32k btu. We used the micor because of the R value. Durock was on the list but a much lower R value.

We had taken the temperature of the fireplace metal which extended above the viewable glass before micore install and it was in the 300 - 350 range. With the micore the surface temperature is now about 115 so the Micore
Is doing its job.

The online version of the install manual and the one that shipped with our fireplacce are a little different. The online version states you can sandwich a metal lath between micore and durock and fasten with screws. My print version just shows a picture of metal lath but no detailed instructions so I had assumed (perhaps incorrrctly) it got mudded in.
Attached Images
  
__________________
Deb

Last edited by cx; 06-20-2019 at 10:11 PM. Reason: Add Link
deb_ohio is offline   Reply With Quote
Reply

Stonetooling.com   Tile-Assn.com   National Gypsum Permabase


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tiling a fireplace surround jstepien Tile Forum/Advice Board 3 09-11-2013 08:43 AM
tiling fireplace surround active5467 Tile Forum/Advice Board 16 11-29-2009 06:53 PM
Help with Tiling Over Fireplace Surround KSD Tile Forum/Advice Board 5 08-02-2009 10:08 PM
tiling a fireplace surround punty Tile Forum/Advice Board 3 07-04-2006 08:04 PM
Tiling a Fireplace Surround keithj2 Tile Forum/Advice Board 3 04-03-2005 03:07 PM


All times are GMT -6. The time now is 06:22 PM.


Sponsors

Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2018 John Bridge & Associates, LLC