Here's some pics of my foundation...help!
So here are some pictures I took of my foundation (an older 1920's home in Ottawa Canada) after some crappy drywall and insulation was removed (the drywall was touching the concrete floor and thus wicking up moister...bad):
1) So my first question is whether this is a rubble concrete foundation or something else? Note the yellow stuff seems to be some sort of interior parging.
2) Upon closer inspection, there seems to be a "hole" in the corner of the foundation (i.e. an area about 12" in diameter that seems to have 2-3 inches of "stuff" missing).
3) The area of the window under the window and closest to the ground appears to be soft, moist, and crumbly to the touch. However, if I whack a hammer against most of the other portions of the foundation, it has a nice solid "tinny" sound...vs. the spongy sound of this small area of foundation under the window.
4) Realistically, is there anything I can do about this...or need to do about this? Is this something the previous owners should have disclosed to me (i.e. I took possession of the house 30 days ago and could not inspect that part of the foundation until I took off the drywall they placed over the foundation).
I am putting up eavestroughing and ensuring the sides of the house are properly graded AWAY from the foundation. I'm just hoping this is all I need to do as I question whether modern foundation repair techniques would actually make things better or worse for me at the end of the day.