Due to clay/water expansion, the concrete slab forming our patio is rising
just enough to impinge on the stucco slab siding of the house, causing it to
crack.

I'm thinking of getting some kind of power grinder and take off 1/2 inch of
the concrete slab's edge.

Any thoughts on this? What kind of tools and grinder will I need. Probably
rent them, right?

Thanks