Which self-adhering ice and water shield for my new roof
Hello roofing pros (and everyone else). I'm about to get my house re-roofed. Being the research-geek that I am, I feel like everyone thinks the Grace Ice and Water shield is the best you can get. I plan to probably go with Certainteed Landmark shingles and Certainteed roofers select for an underlayment. So far, every roofer has included Certainteed Winterguard for an ice and water shield in their proposal. I know that the Certainteed Winterguard is about half the cost of the grace product, so I'm guessing that's why the roofers included the Certainteed product in their proposal. Also, my understanding is that the Grace Ice and Water shield is not very user friendly (super sticky, sticks to itself, etc.)
Now, my question is: should I insist on my roofer upgrading to the Grace Ice and water shield instead of the certainteed ice and water shield, or should I stick with the proposal? I want it done right, and I don't mind spending an extra $200 in material cost to upgrade from Certainteed winterguard to grace ice and water shield. I live in the snowy northeast and I feel like it's good added insurance. What do you other roofers like to use for an ice and water shield?