Replies

1. 
   IMERC | Apr 29, 2008 06:03am | #1

   yes....

    

   Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming

   WOW!!! What a Ride!
   Forget the primal scream, just ROAR!!!

2. 
   KFC | Apr 29, 2008 07:00am | #2

   From pages 100-102 of the JLC Guide to Moisture Control:

   "...when we applied hard-coat stucco over housewrap.  The stucco bonded so tightly to the housewrap that when we peeled the paper back, the advertising transferred to the back of the stucco.  That tight contact destroys the water repellency of housewrap, which works like a tent in a rainstorm: If you touch the wall of the tent, you cause a leak...That's why you should never put hard-coat stucco on any plastic housewrap..."

   He even says that stucco directly over DuPont's StuccoWrap doesn't drain well, coming in 2nd worst out of the 7 stucco/wrap combos they tested. 

   He also panned stucco directly on a single layer of felt:

   ...tar paper has changed... The old felts absorbed water and swelled up when we applied a scratch coat...Then as the felt dried, it wrinkled, shrank, and debonded...creating a thin, convoluted drainage space.  But that process doesn't happen with modern asphalt felt...the paper bonds to the stucco and sticks.  It gets wet and stays wet, there's no drainage...

   However, Mr. Lstiburek says you can alleviate this by using paper-backed stucco lath (such as Tilath), so the paper backing bonds to the stucco, leaving an air space/drainage plane between that paper/stucco and the house wrap.  He talks about this performing best over StuccoWrap, which is wrinkled, but it seems like it would help over plain tyvek too. 

   Felt over the tyvek would help too, but the paper-backed lath would be cheaper than a whole layer of felt plus lath, not much more than the lath itself, really.

   His point was that you need two layers of wrap or paper, not so much that one type performs better alone than the other.

   opinions?

   k

3. 
   wallyo | Apr 29, 2008 07:19am | #3

   All I have ever seen used is a product called 60 minute don't know if it is a brand or type. but it is felt paper.

   Wallyo