Am new to this site and hoping there are some fellow DIY'eys out there who can help me out as I go through the process of doing what I can in my new house. Good to have a sound board to ask a few questions. :-)
So issue is this:
I have taken out an old iron fireplace as I want to brick it up and plaster board it all and underneath the concrete hearth I removed is a strange archway of bricks sunken below the floor boards which stop at the main beam about 1.5 feet out from the fireplace. At the back of this, inside the fireplace and against the back wall, is an 7 inch drop off of dust and rubble which I dug down on and eventually came across bits of the laven plaster ceiling from the basement so I stopped digging.
I am assuming that the archway of bricks is something to do with the fireplace on the floor below but I can't see how they match up?
I have all the bricks and air brick ready to go but don't know how to prep the floor now that there is this strange archway. Previously it has all just been filled with concrete but now I have taken this all out. Do I just fill it with concrete again? Do I add new floorboards and place a 2x4 timber beam at the back in the drop off to connect them to?
Any help would be greatly appreciate.
House: 3x floor, 1900 built.