I have learned sooo much these past couple of years working on this house. What to do in this mountain climate versus the South Texas climate where I lived most of this life.
Good News: I have mentioned Ice and Water Shield before. Learned about it when the first wall was demolished and rebuilt. I have wondered if the stuff works like they say. It's expensive: 200 sf of this brand costs $150! Yesterday, a small area where it had been applied last year was exposed. When that small area was exposed (the steel was removed), we pulled up a corner of the I&W shield and it was absolutely dry underneath. The manufacturer says to NOT cover the entire roof with it because it may cause condensation in the attic. According to them, it should be applied on just the lower 36" edge of the roof and use another product on the rest.
Well, we have used it on the entire roof so far. Humidity here is quite low and much of this house doesn't have an attic. We will add another few attic vents, however, just as a safeguard. Also, there is good attic insulation. The damage I have seen in areas where standard products (tar paper/felt and plastic-type sheeting) was used is pretty extensive. The real problem is there is not enough slant to the roof for snow to slide off. Not gonna rebuild the entire roof structure so the I&W shield is the answer, I hope! So far, so good!
Today, some of the steel will be reinstalled. On the new addition to the eave, we had to order the steel, which should arrive tomorrow. Meanwhile, a winter storm is forecast for tonight so we will cover that part with heavy tarps. I have decided to go ahead with doing the rest of the roof next week, weather permitting. It will be a tight budget this month, lol.