Hiya, Gonna start gearing up to build a courtyard wall at the entrance to my house. I'm planning on using adobe and am pretty familiar with that aspect of it. I'm curious to know where I can find out what my frost line is? Silly question I know but every garden center, home supply, etc... company can't give me a definite answer. I'm in ABQ New Mexico and as near as I can tell, it's 18" but not sure. I assume the top of the footing should be no higher than 18" below grade correct? Finally, looking at a 4-5' wall. Was thinking a 6" thick foundation would be enough....thoughts?
Thanks much, cc