 And we thought we were going to have to replace the roof, but after the RoofMax treatment, all the shingles became very flexible once again, and it was totally good to go for at least another five years. Yeah, and you know what? Each RoofMax treatment comes with a five-year flexibility guarantee, and with three treatments possible once every five years, RoofMax can add up to 15 years of added life to your asphalt roof.