I was in a similar situation with a house I SOLD on Calhoun, Single family on a 50/100 lot.
It was an estate the sellers got some damage on the roof but replaced the entire roof. They just got an invoice from the roofer. They did tell me they had gotten warranty for a 20 year roof, when it came to closing the sellers couldn't get or even provide that document.
We tried contact the roofer but nothing. Please if hiring any contractors make sure there licensed and get all documents upfront, it just saves you any liability. But your Realtor could have gotten this information too!
We where fortunate it was a conventional loan and we closed but buyers really wanted that warranty.
If the inspection was done and on the report came back satisfactory you shouldn't have a problem but If so, and your not able to fix it, It can cause you the deal.
I always ask buyers what type of loan and conditions because I know how tight FHA rules and guidelines are.
I can recommend you call Mark Fisher from United Northern Mortgagers for more details on FHA Loans but the buyers have options they can also ask for a 203K Loan?
Are you working with an agent? The agent can find out this for you?
Best of Luck!
Sales and Marketing Specialist
Exit Realty Search
3928 E. Tremont Avenue
Bronx, NY 10465