Micore 300

[Karjudd]

Trying to determine if Micore 300 is considered “non-combustible”? I see in their documentation that it is considered “flame resistant” but nowhere does it say non combustible. Wondering if it can be used against the surround around a gas fireplace (not a insert).
Thanks!

 

[DAKSY]

If you can put sheetrock against a gas fireplace, I don't see why you
can't use micore, other than it has virtually NO structural strength.
What are you planning on putting over it?

 

[Karjudd]

Yep, don’t need it to be structural. Sheetrock can go next to gas fire but not over the face of it. Hardibacker will accomplish that. I am building a raised hearth for a fireplace xtrordinair 564 that will be a clean face install. That means the 5 3/4 inch lower area below the glass face needs to be constructed of totally non combustible material. I bought 2 x 4 aluminum stock to attach cement board too not realizing the cement board would corrode the aluminum. So looking to see if the micore would be a non combustible bond breaker between the Aluminum and hardibacker.