Chemical smell after new concrete
We had new outdoor concrete stairs laid down in July. The stairs (6 stairs) go down into a 3 season room that is halfway underground. Ever since this project was done, our 3 season room has a chemical smell. At first it was only strong when it rained. Now that it’s colder (midwest) it smells all the time. The stairs are outside the room. Door has been shut. Is this from the concrete ? Sealant? How do we get rid of it ??