Hello. This is my first post Ã¢â‚¬“ I am an architect/builder currently working on a post-beam/conventionally framed custom house in the Upper Peninsula of Michigan.
my question is:
We are just about to install a Ã¢â‚¬Å“warm roofÃ¢â‚¬ over a post and beam timber structure. The sandwich is as follows: 1 Ã‚½Ã¢â‚¬ Tongue and Groove, a 10mil VB, 4 layers of 2Ã¢â‚¬ rigid insulation (8Ã¢â‚¬ total), and 5/8Ã¢â‚¬ OSB on top.
I am looking for advice for the best way to install and fasten this system to the t&g. (what type of fasteners, at what spacing etc).
My concern is that with all the holes that will be punched through the VB by screwing this in- the consequent moisture from rain could get down into my beautiful tongue and groove Ã¢â‚¬“ permanently staining it. We will of course be covering it daily but there is a chance it may still get wet (we are in a high wind location and are doing our best to manage tarps! :- ) At any rate, I would like to minimize the risk Ã¢â‚¬“ as well as minimize the number of holes in my vapor barrier. Any ideas? Special washers? Some kind of sticky membrane at the screw holes? (with out adding uneven thickness).
Thank you in advance!