Hi all, First time poster long time reader on the forum! I have formed a concrete hearth in my lounge for a fire place and have bought some natural oyster slate floor tiles to tile the hearth with. I hav also bought a small 5kw multi stove and had a flue liner installed. My question is can i use a mortar mix (say 4:1) to bed the tiles to the concrete hearth or do i need a specialsis product? I have a load of sand and cement left over from other projects i could use. Thanks for any help. I have had a good search on the forum but could find the answer.