Hi, I am a homeowner in Toronto, Canada, about to get my roof re-done. The roofer gave me a choice between Iko Cambridge AR and BP Mystique, both of which seem to be quite popular around here. He wants slightly more for the BP Mystique, with that shingle’s two sealant bands being the selling point. My question is, do those two sealant bands, as opposed to the normal one, really make a difference to the durability of the roof? Or is this just some form of marketing hype? I’ve yet to find any review which mentions the benefits of two sealant bands on a shingle, one way or another. If there is no benefit, I’d probably go with the Iko Cambridge. On the other hand, if the second sealant band on the BP is likely to make a difference in the durability of the roof, all other things being the same, then an extra 200 bucks is a small price to pay for the BP.
I’d welcome any and all opinions. Thanks in advance for your advice.