[Strawbale] 5 perms / no ventilation; and top-of-wall (Mark Piepkorn)

[David Neeley]

Shody,

Generally, we are dealing with potential roof leaks. Even a relatively small
leak can admit a large amount of water, which we do *not* want getting into
straw bale walls!

Kim lives in Nova Scotia, near the ocean (isn't *everything* in Nova Scotia
near the ocean?) and the climate there can be quite wet and windy. Thus,
horizontal rain born by strong winds can easily cause problems that may not
show up in most other climates during normal times.

However, any roof can leak sooner or later. What we don't want to happen is
to have such a leak cause more damage than we care to deal with, when a
little prevention might limit that damage.

Outside of a desert environment, why *anyone* in their right mind would
build a parapet wall is beyond me. A few years ago, a discussion was held
about a Canadian house with such a wall--and, as might be expected, it
developed a severe leak problem at the base of the parapets...aided, as I
recall, by the use of cement plaster so much in vogue in Canada at the time.

David

On 3/16/07, Shody Ryon <qi4u at yahoo.com> wrote:
>
> Hi,
> I can understand water being a problem at the bottom
> of in-set windows (from the exterior). I do not follow
> the moisture problem at the tops of of walls, unless
> you speaking about parapit walls.
> Shody
> --- kim thompson <shipharbour at ns.sympatico.ca> wrote:
>
> > Hi David,
> >
> > We have used the Typar/Tyvek "apron system" on
> > several projects and
> > have found it relatively easy to install, if
> > detailed as a design
> > element from the start.
> >
>
>
>
>
>
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