Evaluation of building wrap
Martin, I don’t recall ever seeing an evaluation of the various types of building wrap. Bits and pieces in various articles, but nothing comprehensive. If that’s been done, please send me the link.
Otherwise, In our country, we’ve got Tyvek, some woven products and a bunch of perforated plastic films. How do they perform comparatively? vapor permeability, wind resistance, resistance to UV, longevity, etc.
The reason I’m asking, I recently ran across a partial roll of Tyvek in the attic rafters of my garage attic that was about 20 years old. It had visibly degraded and could be easily pulled apart. No UV, no wind wear, just age. What gives? And how long should it last underneath siding?