Hi all - we just moved into a new house with a freestanding fireplace (similar to this http://www.mid-century-modern.com/pr...lminaction.jpg) . Thinking about lighting it last night, I noticed the floor of the hearth, or what the grate sits on was not hard stone, but some kind of soft, porous board - it even had a couple of holes worn in it from the grate.
Any ideas what this could be? Someone suggested it was Homasote NCFR board - if this was true, is that adequate as a hearth floor? Thanks!