Aye, I was hoping I wouldn't have to do that tho. What I think I'm going to do is drill large bore holes in the vertical plank that's at the ridge so there will be a route from eave to eave. The waterproof covering is a good idea. There is one beneath the tiles but one on the other side of the rafters wouldn't hurt. Although looking at your diagram the vapour barrier is on the other side of the insulation to what I mean. I was going to do:
tiles->barrier>joists->barrier->insulation
but the diag does:
tiles->barrier>joists->insulation->barrier
I presume that with no ridge vent the first is the better option.
Which side should it go on?
John
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