One concerning thing I have noticed with breathable membranes (tyvek
etc) is that they don't have the self-sealing qualities of bitumen
felt around nails.
It appears that there will always be a slight gap around any nail or
staple which penetrates the membrane, and if the membrane flexes a
little, then any such gap gets a little bigger.
So is this a big issue, and could it lead to water penetration under
the right conditions?
- posted 12 years ago