I paid off a HERO loan in June. What part of the payoff is deductible? Are the program costs, county recording and processing fees and the interest paid, tax deductible?

The HERO financing was done in April for a new cool roof and heat reflecting exterior wall coverings. After the projects were completed, I decided to payoff the loan. I do not believe any of the project principle is deductible but the other costs might be. Thank you.