Yes, the seller would have to address this. "As is" is often misunderstood--what it real means is "as is" in regards to obvious or visible problems which the buyer could have seen when he or she first viewed the house, like if there was a bathroom which had been demolished for renovation but never later re-assembled or restored. However, "as is" does not apply to issues, conditions, or problems which the buyer would not have readily seen for him- or herself, such as issues only found later by a qualified inspectoer doing a professional inspection.