I have a cantilever first floor which overhangs the basement 1 foot. The 70's home has old T1-11 siding which hangs 2 1/4" lower than the existing 3/8" plywood soffit nailed to the bottom of the joists on the exterior cantilever. My problem is that when I install my board and batten vertical vinyl siding, I need to have a J channel nailed on the bottom edge to recieve the B&B siding. The J channel will be 1/4" lower than the T1-11 to prevent water from wicking into the bottom of the T1-11 which positions the nails for the bottom J channel 1 1/4" above the bottom edge of the T1-11. These nail tips and the splinters they make will be in a area which can be seen when looking up into the cantilever soffit. Iv thought about making another soffit a few inches lower to hide these nail tips and splinters. But The project looks harder than expected because of the limited space and unlevel soffit.
My question.. Can I pop rivet a extender on the nail flange of this bottom J channel to move the nails higher so they dont penetrate below the existing soffit? And does vinyl coil stock exist to keep the materials expantion rate the same? Or could I use 5/8" flat head screws to mount the bottom J channel to the 5/8" T1-11 as not to penetrate the back side? Sorry my question is so long winded. But this is drivin me nuts as Im the home owner / jackleg who wont settle for jackleg results.