Pretty much all interior walls are wood framed regardless, but being a jay flight and aluminum sided, I'd say you have wood framed exterior walls. Makes it easy.
John and Rebecca Dickson
Emma-8 / Little John-5 / Iva-1+
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)