Roof replacement question opinion.

[twfsa]

I am having my 3 tab asphalt roof replaced, with a laminate asphalt.( looks like a shake shingle design), 3 ft. ice and water barrier on entire perimeter of roof.

Currently there is galvanized valleys, the roofer suggested that I do away with that and do what they call a closed valley install.With a 3 ft ice barrier underlayment put down before the shingles in areas,where the current galvanized valleys are now.

I have heard of that before, it does look like a cleaner install as the galvanize weathers and discolors.

Thanks
Tom

 

[roger61611]

Check out this, but it might raise as many questions as answers, given the last sentence:

http://64.233.167.104/search?q=cach...envy.com/db/3/453.html+"closed+valley+"&hl=en