Hearth on screed?

[junglejim]

We’ll soon be preparing the concrete slab in our timber frame build for screed ie; insulating the floor then pouring screed. I’m wondering whether the hearth for fireplace is ok to be laid on this later or whether we need to build this directly off the  slab or anything else that we should pre-empt?

 

 Thanks

[ProDave]

That won't be a "constuctional hearth" but will be okay if you choose a stove where the manufacturer certifies it for use on a (usually) 12mm hearth, which usually means the stove is raised off the floor a bit.

 

Lots of stoves like that available and all you need is a 12mm or more thick hearth of some sort that can even be laid on top of wooden flooring.