MyFloridaCode.com

If you talk to the Tyvek reps or company, you will find "Tyvek" applications
are suitable for various uses per manufacturer limitations (label). My
experience tells me that in some instances companies will support their
product for what you want. Not asserting to this example.

 

From: codetalk-bounces at myfloridacode.com
[mailto:codetalk-bounces at myfloridacode.com] On Behalf Of Mark Cramer
Sent: Tuesday, February 02, 2010 4:42 PM
To: codetalk at myfloridacode.com
Subject: Re: [Florida Code Talk] House Wrap

 

FYI, Typar is NOT a vapor retarder. It has a perm rating of 11.7.   Tyvek
has a perm rating of 58.    (<1 is a vapor retarder)  

 

Tyvek began life as an air infiltration barrier, and is now an air and water
barrier (if installed properly) on the outside of the sheathing. . .  .Older
versions are not waterproof. Newer versions are. Neither are vapor
retarders. 

 

Mark Cramer

Mark Cramer Inspection Services, Inc.

492 20th Ave. 

Indian Rocks Beach, FL 33785

727-595-4211

http://www.BestTampaInspector.com

 

From: codetalk-bounces at myfloridacode.com
[mailto:codetalk-bounces at myfloridacode.com] On Behalf Of Bob Koning
Sent: Tuesday, February 02, 2010 10:51 AM
To: Ken Rodgers; codetalk at myfloridacode.com
Subject: Re: [Florida Code Talk] House Wrap

 

I would concur; I belongs on the outside of the sheathing. Placed behind, it
would stop or restrict vapor at that point where it would condense and rot
the sheathing

 

IMHO,

 

 

R.J.Koning - Director

Contractors Institute

rjkoning at contractorsinstitute.com

8301 Joliet Street

Hudson, Fl 34667

727-863-5147

 

 

 

From: codetalk-bounces at myfloridacode.com
[mailto:codetalk-bounces at myfloridacode.com] On Behalf Of Ken Rodgers
Sent: Monday, February 01, 2010 7:07 PM
To: codetalk at myfloridacode.com
Subject: [Florida Code Talk] House Wrap

 

Has anyone ever heard of putting the house wrap on under the sheathing
(OSB)?  I'm doing a siding replacement job where the lap siding had failed
(can't remember the name of it but it had a class action law suit against it
several years ago).  There are some spots where the siding allowed the OSB
sheathing underneath to become saturated and thus rotten.  As we were
removing some of the bad spots of sheathing to be replaced we found that the
framing had been covered with TYPAR.   It's unfortunate that it wasn't on
the outside of the sheathing as it would have made our siding replacement
job MUCH simpler.  

 

I was just wondering if anyone had ever seen this done and if it was ever an
accepted practice to do this or is this just another example of how NOT to
build a house.  I know the code (703.2) states that the weather-resistant
material will be applied over studs or sheathing but I'm pretty sure this is
not intended to mean you can/should put it under the structural sheathing,
right?

 

Thanks,

 

Ken

 

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