Still another hearth pad build question

[brider]

Two things:

A previous posting gave a link to an on-line Micore board supply house, but the board is only available (at that source) in 20" widths.

Is it valid to lay sections of 20" width board butted together to form the required width, then another layer 90 deg to the first on top, to get the required thickness? My concern is hot spots from heat traveling right thru where the two layers cross, and also along the butt seams, where my required 1" thickness will be theoretically reduced to 1/2".

What kind of bullnose trim have you guys used? I took a quick look at HD for edge trim, and couldn't find anything with a good profile that I could screw into the edge of the Micore stack and tile/grout up to it.

 

[begreen]

That'll be fine. The tile is a good thermal K barrier, the micore is an insulative R barrier. If really concerned, put a sheet of metal between the micore and the durock tile underlayment.

 

[Tfin]

I bought some oak molding type trim from HD. Stained it and it looks really nice. I have a 3/4" plywood base to my hearth pad that I used to also secure the trim to.

 

[brider]

Can I tile right over the Micore, or do I need to add Durock over the Micore? I'm thinkin' 3/4" plywood, 2 layers of 1/2" Micore, then tile, unless there are prohibitions to tiling over Mocore.

 

[Tfin]

Can I tile right over the Micore, or do I need to add Durock over the Micore? I'm thinkin' 3/4" plywood, 2 layers of 1/2" Micore, then tile, unless there are prohibitions to tiling over Mocore.

You definately want Durock/Wonderboard ontop of the Micore. Then get some Durock screws to sink down through everything into the plywood to secure it all.

THEN apply your tile with adhesive.