I am trying to build a fireplace, to put a wood burner in.
I intend to use clay flue liners. I intend to build a double skined chimney, initally from 7N blocks, but then into something that looks good once it comes out the roof.
So far I am up to lintel level, I have my lintels cut to size.
I have worked out how to hold my bottom flue liner in place, while I go up a level, but I have some puzzles ........
What holds the bottom flue liner in place? is it simply the fact that it has motar on the sides. If this is the case, then I assume I have to pack this in quite well.
Whats finishes the top of the opening ? I am thinking of putting a cement sheet in (like MDF but made of cement), all cut to shape, with a hole for the flue liner to protrud through.
Once I have the first flue liner in, am I supposed to fill between the flue and the brickwork with vermiculite or a "week lime mortar" ? If the liners are not held on the way up, then they all rest on the bottom one.
Do I seal between the flue liners with fire cement ?
Thanks Rick