ironspider
Member
Greetings all, first off a big thank you to all the people that responded to my fireplace demo thread. I have removed the hearth and scraped up all the loose mortar and such. I'm having the chimney cleaned and buttoned up and after that (and cleaning/up reworking the sexy temporary attic blocking pieces of wood) it's on to building the new wall. So I now basically have this concrete "slab" in front of the fireplace that is a tad *lower* than the plywood subfloor that would have butted up against it when it was in place (see attachment #1). My goal is to now construct a partition wall about 16-18" out from the original wall. I will frame this out so that we can do built-ins and a middle section for a bioethanol burner channel and a TV above it.
So, the existing concrete runs the entire length of the wall and is, of course, not level. So I was wondering if my best bet would be to use some form of "self-leveling" mix to bring this concrete slab thing to a level height, so that I could then attach the sole plate to it? I've never worked with that stuff before but I'm going to need some kind of level surface here correct? If it's a go that I should be leveling the surface with some self-leveling mix, do I bring it right up to the plywood subfloor? Or stop it 3/4" or 1" before it? Once the the leveling compound has cured/setup is it just like going into concrete/masonry at that point? I would use tapcons to attach the sole plate to the leveler-concrete underneath?
Also, on an install like this, what do you all recommend for the best way to make this wall "straight"? Just measure the sole plate a set amount of inches from the existing wall (the wall the heart was built-out from)? Use something like the 3-4-5 rule to the outer wall? Measure the top plate out a set amount of inches from the existing ceiling edge to make its line?
Thanks!
So, the existing concrete runs the entire length of the wall and is, of course, not level. So I was wondering if my best bet would be to use some form of "self-leveling" mix to bring this concrete slab thing to a level height, so that I could then attach the sole plate to it? I've never worked with that stuff before but I'm going to need some kind of level surface here correct? If it's a go that I should be leveling the surface with some self-leveling mix, do I bring it right up to the plywood subfloor? Or stop it 3/4" or 1" before it? Once the the leveling compound has cured/setup is it just like going into concrete/masonry at that point? I would use tapcons to attach the sole plate to the leveler-concrete underneath?
Also, on an install like this, what do you all recommend for the best way to make this wall "straight"? Just measure the sole plate a set amount of inches from the existing wall (the wall the heart was built-out from)? Use something like the 3-4-5 rule to the outer wall? Measure the top plate out a set amount of inches from the existing ceiling edge to make its line?
Thanks!