 Re: Refractory Mortar Vs. Regular Mortar
Don't forget the "mix your own" option in the FB plans:
3 parts sand
1 part lime
1 part fireclay
1 part Portland cement
Except for the fireclay (which can be had by grinding down firebrick scraps) the rest of it should be able to be sourced locally. I mixed a batch of this to coat my exterior and although it was much grittier than HeatStop, it has cured up very nicely.
I will echo dmun's point about the top of the dome being the high stress area - I wouldn't use standard mortar for this if you can at all avoid it. |