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-   -   Shingle reroof: metal valleys yes or no? (http://www.diychatroom.com/f9/shingle-reroof-metal-valleys-yes-no-938/)

Hossman 08-20-2005 03:52 PM

Shingle reroof: metal valleys yes or no?
 
I'm going to reroof my house with new 30 or 50 year arch. shingles. I've got a couple of areas where the roof lines intersect, about maybe 25 lineal feet total. One of the contractors that came out to give me a quote indicated that it's better not to install a metal valley since the nailed areas of the valley are an eventual source of water intrusion. He recommended doing a "california cut" where he would put triple underlayment in the valley area and overlap the shingles? I'm not so convinced that would be a better method to keep water from getting under the shingles. Which method is better?

Grumpy 08-22-2005 07:15 PM

Most all my shingle roofs are closed cut (aka california cut) valleys. Why use metal on a shingle roof for anything other than cosmetics?

Place ice shield in the alley before installing the shingles.

Hossman 08-22-2005 09:11 PM

Quote:

Originally Posted by Grumpy
Most all my shingle roofs are closed cut (aka california cut) valleys. Why use metal on a shingle roof for anything other than cosmetics?

Place ice shield in the alley before installing the shingles.

Thanks. The contractor mentioned that he felt it was purely cosmetic as well.

Do I need to have the ice shield installed here in So. Cal?

Grumpy 08-23-2005 08:44 PM

Ice shield protects against water backup as well. I would be talking out of turn to say it is required but I know it can't hurt.


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