I want to reopen a recently closed-off fireplace, but there's not very much information on the web to guide me. It was closed off earlier this year after I had the backboiler taken out. Now, if I remember correctly, after I take out the breeze blocks there's a rather large hole left behind with a throat from the old fireback keeping up the front of the fireplace, and that's it. I need to fit a new clay fireback under the old throat. I suppose I could take some more brickwork out from on top of the throat, and even the throat itself, but I'm worried that the brickwork above it might collapse because, from what I've read so far, the throat acts as a concrete lintel and keeps the interior wall from collapsing. The best links I've found so far are
Does anyone here have any better sites that I can visit for guidance, or advice of their own to guide me? There's one question in particular I would like to ask; do I need to completely remove the chimney lining which was fitted for the earlier gas backboiler, or can I just remove as much as my arm can reach?