Should We Be Concerned? Discovered Large Tree Root Against House

For several years we had a 50-square foot slab of concrete that had multiple cracks in it - cracks all the way through the slab. When we would get hard rains, we would get water in the downstairs den, just below the area of where these external cracks were in the slab. We assumed we were getting water in the downstairs den because of the cracks in that concrete slab, so we would plug the cracks (as best we could) with some kind of concrete caulking sealant every year or so to try and...

Should We Be Concerned? Discovered Large Tree Root Against House