Hello, I am curious about the proper underlayment is for different kinds of roofs.
High Temp I&W
In conjunction with:
peel and stick roll roofing
screw down metal
standing seam metal
Is the difference between smooth and granulated I&W that big? In what circumstances is high temp appropriate? It seems to me that the high temp is the most expensive, what is the reason and is it bad to use it with any of the above roofing types?
Any info or guidance to other resources would be very helpful. Googling the issue brings up related information but not exactly what I’m trying to figure out.