Amount of sqrs to put back on a roof with 33.12 sqrs on now

Amount of sqrs to relpace a33.12 sqrs roof to make up for wast have one valley in roof how many sqrs to be need ed to replace 33.12 sqrs

It also depends on how good your roofer is and if he makes mistakes and has to tear things off that he screws up. I would order 35 square