Dino rover wrote:what is the difference between the tyvek I can get at plasta masta for $180 for 30 m2 and 1443r?
Not sure about the stock that Vast have, but Tyvek with the Homewrap printing is usually the hard structure homewrap Tyvek, not the soft structure 1443r.
As posted earlier in this thread, the 1443r stuff is more paper/cloth like and lighter compared with the Homewrap. The 1443r stuff is used in kite making, and protective apparel and signage printing, and usually is not preprinted. There's a pic of what it should look like in the TRG page http://www.terrarosagear.com/materialsconstruction.htm. I've not compared them directly, but my understanding is that the 1443r is more breathable than the homewrap.
The stuff at plastamasta is the homewrap equivalent, and the homewrap stuff is generally cheaper than the soft structure Tyvek.
Anyway if you can wait a couple of weeks, I can PM you when I'm back and you can look at it for yourself.