|
Posted by marson on January 21, 2007, 9:14 pm
Bobk207 wrote:
> hawgeye wrote:
> > "Robert11" wrote...
> >
> > > Have a house with T1-11 (plywood panel type of stuff) siding on it, which
> > > isn't in the greatest of shape.
> > >
> > > In the Spring, will be having the typical horizontal Cedar Clapboards
> > > installed.
> > >
> > > The two contractors we've had over both said to place the new clapboards
> > > right over the existing T1-11.
> > >
> > > Have two questions, please.
> > >
> > > One of the contractors says he uses "AYE" quality level cedar clapboards.
> > > Guess there are different "quality levels" for this stuff.
> > >
> > > a. Is this AYE grade what we want ?
> > > Are there "better" cedar siding grades to consider, or is this what
> > > most
> > > folks use ? Brands, etc. ?
> >
> > Aye is about the best grade therefore it costs more.
> >
> > > I've asked for pre-primed clapboards, but is there anything else I should
> > > be
> > > specifying ?
> >
> > The type of nails.
> >
> > > b. Surprisingly, one of them said he does not like Tyvek, and has had
> > > poor
> > > results with it.
> > > He wants to use #15 Felt between the existing T1-11 and the new
> > > Clapboards.
> > >
> > > I was under the impression that Tyvek was a sort of "standard" these
> > > days.
> > >
> > > Would sure appreciate any thoughts on this propoised use of #15 Felt
> > > rather than Tyvek ?
> >
> > The felt is cheaper and easier to work with, but doesn't act as good of a
> > barrier to air and moisture as tyvek does.
>
>
> Also 15# is a little thin, the stuff breaks down but I'm not sure 30 is
> used on walls?
>
> If you use felt on a roof 30 is the way to go
>
> cheers
> Bob
Yes 30# is the way to go on walls. There are some experts out there
who recommend felt over tyveck, since it is more breathable. (I still
use Tyveck on new construction though. It costs more, but the labor
savings over felt is considerable.) Also, there is some concern with
Tyveck and cedar--the tannins in the cedar act as surfactants that
break up the surface tension of water and allow water to pass through.
I would ask your bidder how they plan to detail the windows and doors
so as to prevent water intrusion. They should add some sort of z
flashing over the head casing, which is tucked under the building
paper. Details like that are more important than whether they use felt
or tyveck.
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap