Building a shed, and want the experience of making wood sashes and
frames myself. The Freud bits suggest 1 5/8 thick wood, so I'm
going to get 6/4 stock. 6/4 poplar I can get; spruce/fir I can mill
from 2x4's, pine I can laminate from 1x Home Depot stock.

Anyone have a recomendation? I like poplar for its paintability,
but is it good for an exterior application such as this?

Thanks,
Chuck