Determining Depth of Existing Footer/Foundation
I have a 1930's DC brick rowhouse and will soon be adding onto it. It is necessary for me to ascertain the depth of my existing footer/foundation. Seems obvious to me that I should dig next to the foundation of the house until I reach the bottom.
Is this this right way to go? Are there any risks? I would assume I'd like to fill the hole ASAP, do I need to do anything special? Any suggestions, tips, warning would be much appreciated.
Also, any thoughts as to what I will find? What sort of footer/foundation was typically employed? Current min/req foundation depth is 30", is the current depth likely more or less than that? Thoughts? Wagers?