The floor in my living room (original yellow pine) is unlevel (about 1.5 inches)on the rear side because of the natural stone foundation crumbling over the years due to exposure from improper water drainage from the roof. Although the floor has been reinforced by a previous owner, the floor itself is solid but it still bothers me. To get a better idea of what Im talking about this part of the foundation cant be seen from the exterior of the house as its under the floor.
Ive crawled under the house and viewed whats left of the foundation in the area and found crumbled stones and reinforcements. Also there is a bathroom, the backdoor, linen closet and bedroom all of which arent original parts of the house. The bathroom, linen closet, and backdoor were added not too long after the house was built as it has the same type of stone foundation. The bedroom was added in the late 70's early 80's as it certainly doesnt have the solidity of the rest of the house nor does it have natural stone foundation, it has concrete blocks (YUK)!
1) Can I have this repaired without it causing more damage to the walls and existing structure? Common sense tells me that If I jack up the floor everything above it would have to move also.
2) Would I have to tear off the added portions of the house to have the floor leveled? I wanted to replace those rooms anyway evetually.
The picture I provided isnt the best. From where Im standing its level but slowly starts to get lower as you get to the wall. As you can see the door casing isnt level either as it slopes to the left compared to the backdoor casing.