So I laid the floor bricks last night and granted I was thirsty and it was getting dark but I swear that in the night my bricks shifted a bit and left bigger gaps between them than when I laid them. Should I mix up a batch of refractory mortar and fill the gaps or will they be fine. There is a solid 4 1/2-5" of percrete underneath. Also if anyone is planning on building and running a thermocouple under the floor I beseech you to put a straw in the structural hearth layer to run the wire through. I tried for an hour to drill through the concrete before giving up and going from the side through the percrete.
Forum Issues Update
Things are progressing in getting things back in order on the Forum! User avatars should be showing up. Attachment and inline images are in the process of being uploaded. We are still looking for a migration path for the Photoplog gallery. Thank you for your patience!