siding

Hi there - I am new to the channel. Wanted to run a question by some of you experts out there. I am replacing windows in my home with replacement windows and am trying to figure out the best way to put trim on the exterior. As a side note, my neighbor hired a contractor to install his windows...

I've bought some T&G Shiplap cladding for my garden room. The intention was to mount it horizontaly but I think it would look way better vertical. Can anyone see any issues with that? I will counter batten to create an air gap, and I have installed a breathable membrane over the OSB sheathing...