Last year I forgot to include work on my rented house and to send a contractor the 1099-MISC. Can I add this expense this year?

I’m renting out my home and declare the rent as income. I re-roofed the house in 2015 but forgot to add it to the expenses for the house. Can I add them now for 2016 and would I have to file a 1099-MISC for the contractor for this expense?