I am getting a new roof (hail damage) and have just a couple of questions.
I have noticed two way of finishing valleys. Most of the older jobs seem to cut the shingles on both sides forming an exposed valley flashing of about three inches to center. Many, not all, of the newer jobs seem to weave the two planes of shingles to form a continuous surface.
When I first saw the new style I was not sure I liked the look, but I believe I prefer the look, less of a break at the valley. My question however is more along the practical side. Is there a down side to the weaved style? Looking at the rusted valley flashing makes me like the looks of it even more.
Next has to do with the stuff they use for an ice dam protection. Some sort of self sealing substitute for the lowest felt. Is this stuff worth it? How about in valleys?
How about ridge vent. it seems to be a good idea, and I have been told it also provides better ventilation. True?
Last, anyone have anything bad to say about the heavy dimensional look shingles?
Thanks.