A lot depends on the purchase contract, the conditions for purchase (such as correcting problems), and deadlines in the contract. If the contract is written to depend on completion of the corrections, then you may be safe -- again depending on the contract content.
It would be best for your to review all of the paperwork with an attorney. If the contract requires that you accept the conditions on closing you may be letting the contractor off for additional repairs. So, check with an attorney. I may be able to assist, if you want.
Answered on Sep 26th, 2016 at 9:18 AM