Originally Posted by
dan orourke
So then the 1/8 inch thick cover is okay. Who would've thunk it.
Would 1/8 inch meet minimum roof sheathing thickness? Nope.
This is what Jerry Mc. is saying: Consider an open ceiling living room (or entire house) with exposed beams. The roof sheathing would need to be thick enough to: a) span beam-to-beam, and, b) meet minimum roof sheathing thickness. In some areas you might get by with 3/8 inch roof sheathing, but the span might only be 12 inches - beams 12 inches apart? Not likely.
So, move the beams to 4 feet apart, that 'looks nice', however, you will now likely need 2x T&G roof sheathing.
And don't forget the insulation. In the above case, it would need to go 'on top' of the roof sheathing.