Has anyone had concrete underpinning done?
Sorry for the length of this post - it's hard trying to explain it all.
We bought this house in March. It's a brick veneer bungalow, built on concrete piers (or stumps, as they're called here in Australia).
The pre-purchase house inspection guy noted that there were a couple of vertical cracks in the brick on the front corner of the house, so we called in a structural engineer. They are not wide cracks - I can't fit a finger into them. The engineer said that the cracks in the front corner were there because the brick exterior wall had sunk, due to the dryer weather over the past several years. He said concrete underpinning would fix that problem, for "around $3500". As the house was run-down and we bought it as a "renovator's delight", that amount of money wasn't unreasonable (given the price we ended up paying for the house). So, we went ahead with the purchase.
When the house was empty before we moved in, we noticed how the floors slope to one side (the previous owners were well-schooled in camouflage). We've since been advised not to make any substantial changes to the house until it's been leveled, because it's silly to pay for framing new interior partition walls, and plaster, only to have it crack when the floors are lifted. That's reasonable.
One company said they could level the floors (they jack up the house and put shims on the piers), and leave doing the brick walls for a later date (when we have more $$$). That way, we could proceed with renovations to the inside of the house. $1700 to level the floors.
Another company said that all of the brickwork needed underpinning, the entire perimeter (it's a 1700 sq ft house). He said the interior couldn't be done without doing the exterior, as the exterior brick walls are "tied" to the wood frame of the interior (I do know that brick ties allow some leeway for movement, but how much, I don't know). He claims if we went ahead and did only the interior floor/wall leveling, that it would put stress on the brick ties, which would pull down the exterior brick walls! He was throwing around numbers like $20,000 - 25,000, to do the whole thing! I was nearly in tears when he told us that.
I know they've got to rip up the driveway and concrete footpath that runs along part of the house. Then they excavate the footings, jack it up somehow, and pour in concrete.
I'm hoping that one side of the house can get away with only the hydration things being sunk into the ground (which will enable us to "water" the footings, and keep them from sinking).
There are two other companies in the area who do all of this sort of work, but it's next to impossible trying to get them to show up (I've worked out that it's easier to get tradesmen to show up if I get my husband to make the appointment, because they're much more reluctant to do a no-show for him. Sad, but true). We've left messages for those two other companies again today, so hopefully someone else will come and look at it. We need another opinion.
Has anyone here had to do anything to this extreme? Did the house crack badly afterwards? And how long does it all take?
And I hope I've been relatively clear in explaining all of this. :-(