I want to build a small house--1000 sq ft--on a very rocky lot. How do you pour footings or piers in this type of terrain? Is it possible to place piers directly on the rock? These rocks are limestone and very large.
Homes are built on rock all the time. The challenge is that you need to bear the footings on solid rock, not displaced or broken rock.
The best advice you can get is to spend a couple hundred bucks and have an engineer come out and evaluate your home's bearing conditions before you build. They can determine if the rock is stable and can make recommendations that might save you money in the long run (footing dimensions, etc).
I have to demolish an existing house that was built about eighty years ago. The original foundation is a pillar and post, and the pillars are dry- stacked stone. Sometime in the sixties a concrete block wall was added to two sides of the house, but it has a couple of large cracks due to settling. It seems like the most stable surface is the stone. That's why I was wondering if I could attach steel or wood piers directly to the stone. I've had a couple of local excavating contractors look at the site, and they told me that this area is mostly solid rock with pokets of soil here and there.