Foundations and weird water table
Posted: Tue Sep 11, 2018 11:57 pm
Greetings!! Sorry for the long absence. We needed a break after finishing the Bungalow, then I ended up back full time and life happened.
So, we are finally ready to tackle the cottage disaster. It has no basement. Floors are out due to a lot of water infiltration issues. The middle of the floor used to rest on a line of cinder blocks with no foundation below. So, we want to put in piers. Now this causes a few things I need to discuss with y'all.
Dirt isn't super deep, it gets to clay pretty quick.
There is a sump hole (@ 30" deep) with trenches ranging from a few inches to about a foot at the sump hole.
#1: I can't find a guide to how deep the frost line would be inside of a structure. I want to dig the piers deep enough, but I can't figure out how deep, deep enough is!! I don't want them to heave. I can't really say the cinder blocks ever did, but they did sink into the dirt a bit and eventually became kind of wavy.
#2 We started drilling 6" diameter holes (because that's the size auger we had, we are discussing enlarging them but we have a complication). We drilled 12 holes. 4 down the center and 4 on each side about 2 1/2' from the outside wall foundation. The outside 8 holes were just to help keep bounce out of the floors. Here's the part where it gets weird, even for an old house. Like kind of defies what I know of science. Some of the holes have standing water, some do not. Weirder yet, one hole has about 28" of standing water, only about 2' from the sump hole with 1" of standing water. So that hole has about 17" MORE water. The surface is dry, it didn't run in the house and into holes. The water level varies in all the holes. Water seeks it's own level, right?? Except in that house?? How is that possible??
So, we are finally ready to tackle the cottage disaster. It has no basement. Floors are out due to a lot of water infiltration issues. The middle of the floor used to rest on a line of cinder blocks with no foundation below. So, we want to put in piers. Now this causes a few things I need to discuss with y'all.
Dirt isn't super deep, it gets to clay pretty quick.
There is a sump hole (@ 30" deep) with trenches ranging from a few inches to about a foot at the sump hole.
#1: I can't find a guide to how deep the frost line would be inside of a structure. I want to dig the piers deep enough, but I can't figure out how deep, deep enough is!! I don't want them to heave. I can't really say the cinder blocks ever did, but they did sink into the dirt a bit and eventually became kind of wavy.
#2 We started drilling 6" diameter holes (because that's the size auger we had, we are discussing enlarging them but we have a complication). We drilled 12 holes. 4 down the center and 4 on each side about 2 1/2' from the outside wall foundation. The outside 8 holes were just to help keep bounce out of the floors. Here's the part where it gets weird, even for an old house. Like kind of defies what I know of science. Some of the holes have standing water, some do not. Weirder yet, one hole has about 28" of standing water, only about 2' from the sump hole with 1" of standing water. So that hole has about 17" MORE water. The surface is dry, it didn't run in the house and into holes. The water level varies in all the holes. Water seeks it's own level, right?? Except in that house?? How is that possible??