Tyvek Homewap is available in 9' and 10' widths, but it is heavier than Tyvek Softwrap. Homewrap base weight is about 1.8 Oz. per Sq. Yd, roughly equivalent to 70d, 1.9 Oz. per Sq. Yd Nylon. Kite Tyvek or Softwrap, 14 series is lighter at 1.27 Oz. per Sq. Yd. You can certainly use Homewrap, but it is heavier. It's the Softwrap that I'm not seeing in wider pieces. I would imagine that they make it in wider widths, but Finding a place where an ordinary person can buy a short piece is not that simple. Quest Outfitters has the best price on Tyvek 14M that I have seen so far at $5.45/Yd. It's much more expensive than Homewrap per yard, but I don't need a hundred feet right now. I believe that everything that you have said is true, but that we are talking about different materials. DuPont makes a number of different Tyvek products and it's not easy to differentiate between them if you aren't in that business.