MyFloridaCode.com

Ken

 

I have seen this practice as a NOT to be performed.  It likely ties back
to northern construction details where the moisture vapor moves from the
inside of the building towards the outside in the winter time.  The
observations you described are not suitable for hot humid climates.  I
would recommend the vapor barrier / drain plane on the outside of the
sheathing with an air space capillary break between the sheathing and
the drain plane.  

 

 

William H. Spates, President
Indoor Environmental Technologies, Inc. 
1384 Pierce Street 
Clearwater, FL 33756 
phone: 727-446-7717 
fax: 727-441-3203
cell: 727-365-1913
 
website: www.IETBuildingHealth.com <http://www.ietbuildinghealth.com/> 
email:   wspates at IETBuildingHealth.com
<mailto:wspates at IETBuildingHealth.com> 
 

 

 

________________________________

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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