> > > In a properly built house water does not pass through the siding to
> > > the sheathing.
> > False.
> What's false? What IS the purpose of the siding?
What is false is that a properly built house will not allow water to pass
through the siding
> > > Siding is constructed to have the water run off.
> > > Thousand, ten thousands, even millions of house shed water perfectly
> > > before tyveck was invented.
> > If ten thousand people jump off a bridge, it doesn't make it right
> That doesn't make sense. Are you suggesting people shouldn't have
> built houses before Tyvek was invented?
It makes sense, you just chose to ignore it.
> > > Lots of house still don't use tyvek, and
> > > if you price a roll, you'll see why.
> > the new issue of IBC will make it a requirement.
> Are you implying that Tyvek will be required by all local building
THe existing code required building felt or other approved materials (i.e.
tyvek) my understanding of the new code to be issued will require a tyvek
> > > Besides, carpenters often ruin
> > > the tyvek, even the sheathing, and never properly repair it, making
> > > the tyvek only partially effective in reducing air movement through
> > > the home.
> > Poor construction practices (by some) is NEVER a reason to not
> > material.
> No one said it was. Just stating a fact about poor construction.
No, you were implying why not to use it.
> > >BTW, the purpose of tyvek is not to shed water (although it
> > > does),
> > False, the tyvek is an air infiltration barrier and a secondary
> > barrier
> And I didn't say that the purpose was an air infiltration barrier?
Reading comprehension is not one of your strong points is it......what
part of AND don't you understand
> > >it is to reduce air flow without completely stopping the
> > > movement of gaseous water. I would prefer my house to be wrapped in
> > > tyvek, but if it isn't I would get too upset. No house built before
> > > ?1970? used tyvek.
> > No, they used building felt for the same purpose, but it wasn't as
> > >
> > > Tarpaper works good as moisture barrier and was ok in air leaky
> > > which allowed any accumulated humidity to be removed, but you
> > > want to use it under the siding in a modern house because moisture
> > > would be trapped inside the walls.
> > False
> Oh? a poorly constructed or damaged moisture barrier on the inside of
> the wall and an effective moisture barrier on the outside of the wall
> wouldn't lead to moisture trapped in the wall?
Building felt was never sealed, i.e. taped........vapor pressure was not
trapped by it. It was a decent moisture barrier from the outside if
properly lapped. therefore it was not a true moisture barrier from the
inside.......you really don't know what you are talking about.
> > >
> > > Jeff Six wrote:
> > > >
> > > > I have recently discovered that my house (I've been there a little
> > > > over two years) does not have housewrap underneath the vinyl
> > > > Underneath is OSB sheathing and the vinyl is installed right on
> > > > the OSB. This is true of all of the houses in my development.
> > > > looking around the newsgroups, I find the while housewraps are
> > > > recommended, there appear to be tons of houses that have this same
> > > > situation - vinyl siding installed directly over the wood/OSB
> > > > sheathing. After some rain, I've popped the siding a little so I
> > > > see under and don't see any rain or moisture on the OSB.
> > > > Nevertheless, the paranoid in me is concerned.
> > > >
> > > > I'm really looking for some reassurance here that this situation,
> > > > while not the best in the world, is OK. Little help? Thanks.