What is a "Dead Valley" I have been in the commercial roofing business for many many years, and I have never heard this term. Gusset, yes, but never dead valley. And ONB is absolutely correct. Ice Dams Flashing is simply an improved underlayment which is used to enhance resistance to ice damming. It is not a substitute for a waterproof, low slope membrane. As usual, many steep roofers are using it wrong, and they will pay for their ignorance out their or their clients wallets.
" A lot of men build things, and a lot of things fall down "
Last edited by jagans; 02-02-2013 at 07:26 PM.