Please proof this new article on efflorescence.

[gromicko (Nick Gromicko, CMI)]

http://www.nachi.org/efflorescence.htm

[mboyett (Michael Boyett, TREC #7290 (Ret) Boerne, TX)]

Water can originate from rain or sprinklers, or arrive from behind the material from household leaks.

Is that punctuation correct? I really don’t know, but it looks weird to me.