Chicago is rough on buildings. The weather can be brutal, and lake effect wind, plus summer humidity,. can wreak havoc on building materials from cinder blocks to wood stairs. And for fixing wood stairs, looking into the wood stair repair services at HQ is a good first step. They have carpentry contractors in Chicago that specialize in many forms of carpentry, but have a crew of very specific woodsmiths than only repair and replace wood stairs, and they are the best at it in all of Chicago, and the surrounding suburbs. They have the experience to know when a stair can be saved, and when they must be replaced, and will give you a fair and honest assessment.