Whitewood is just soft lightly colored wood. Spruce, cottonwood, poplar.
If you put the slats tight you will end up with a gap in time as the wood shrinks, especially if it is in the sun.
What is the overhang for? To mount hangers or just for looks? Pics would be helpful.
Weber Imperial Sequoia (restoration in progress)
Weber Platinum (The Green Lantern)
Weber OTS 22.5
UDS (with more to come)
Old Smokey ES (A gift, don't buy one)
Humble member of the Society for the Preservation of Authentic Royal Magical Rare Kaskaskian Peppers
Honor bound to protect, prepare, and serve