I roofed the house I built in Maine with Advantech. At that time I believe they guaranteed it for fifty years, even if it was submerged. I tried to buy it here, and was told it wasn't made anymore... Built my house, and found out I was lied to... Sent Menards a letter stating my anger, along with the note and the guys name that told me that... naturally I didn't get any response. It has been twenty years since I used it, but at that time, I LOVED it! Naturally it rained while I was trying to slap tar paper on the roof... the roof stayed perfect, but had to replace some of the plywood on the floor under that roof when it warped.