MyFloridaCode.com

Ken,
 
The class action law suit was against Louisiana-Pacific, and the siding  
they manufactured (panel as well as lap) was manufactured to  resist absorbing 
water; but they did not consider what would happen when  the "seal" was 
breached by saw cuts and nails (especially  counter-sunk).
 
I suspect that the original builder on your subject job put the house  wrap 
up directly over the studs with the intention of applying the lap siding  
directly thereto, until someone (like the inspector) said "no way", you have 
to  have "shear wall" sheathing behind lap siding. They just failed to 
comply with  the proper order of installation.
 
Have a nice evening,
 
Paul Myrick, C.B.C.
Jacksonville, FL  
 
  
 
 
In a message dated 2/1/2010 7:08:54 P.M. Eastern Standard Time,  
Ken at artisanbilt.com writes:

 
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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