I have more questions about materials.
I have found that the standard concrete block around here is 8x8x16 (BTW is it the same as cinderblock?). That size will completely mess up the design, which is for 6x8x16. Still looking for the right size. Is 6 the High or width?
FireBrick: It seems easier to find the 9 x 4 x 2 1/4. Is it ok to replace it or do I continue to look? I am just starting to make measurements for the hearth slab.
The instructions says the hearth slab will need 3.5cf of castable refractory, but I do not see where, unless it refers to the cinderblock.
I also want to verify:
The BrickBox Subbase/hearth slab calls for:
- High Strength concrete mix (12x60lb bags or 9x80lb)
- It also has 3-cinderblocks with insulation mix inside and possibly a couple small ones
Refractory Slab insulation Panel
- stainless steel fibers
- Castable refractory
- Insulation (Cement and Perlite)
Quantities: Materials state High Temperature Mortar 110 lbs, and page 44 show 100 lbs. I imagine the 110 includes 10%?
Is castable refractory mortar the same as refractory mortar?
I found this product:
but I have no idea.