First we took the siding off the house, then we took the boards off that were underneath the siding, then we took the siding that was underneath the boards that were underneath the siding, then we took the boards off that were underneath the siding that were underneath the boards that were underneath the siding, then we took off the boards that were underneath the boards that were underneath the siding that were underneath the boards that were underneath the siding. Second, were replaced the studs, added insulation and OSB board, cut a hole in the OSB added an outdoor vent, pulled out the microwave, slide the damper assembly, put the microwave back up, wrapped the back wall in house wrap, added insulation board and put the siding back on. :)