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squirell nutkin · 09-08-2010, 09:29 AM

Question:
Why did you bother to cut all those lapped valley strips rather than run a full width section down the valley? I guess you don't get ice dams in Seattle. Still, it seems like an awful lot of extra work.

I'd put a metal valley down if you get ice dams or loads of snow, or if the sheathing in the valley isn't very even. Over time the heat on the roof causes the roofing material to sag and it will eventually drop into any cavities or unsupported areas. One reason for metal valleys. But around here we use "IKO ice and water shield" on valleys, eaves, and rakes. Some folks cover their whole roofs with it. You could probably get away with just a strip of roll roofing on top of 30# felt.

Looks good.

09-08-2010, 09:29 AM	#96
squirell nutkin has a second hand user title Join Date: Feb 2006 Location: in a Nut House Posts: 2,017	Question: Why did you bother to cut all those lapped valley strips rather than run a full width section down the valley? I guess you don't get ice dams in Seattle. Still, it seems like an awful lot of extra work. I'd put a metal valley down if you get ice dams or loads of snow, or if the sheathing in the valley isn't very even. Over time the heat on the roof causes the roofing material to sag and it will eventually drop into any cavities or unsupported areas. One reason for metal valleys. But around here we use "IKO ice and water shield" on valleys, eaves, and rakes. Some folks cover their whole roofs with it. You could probably get away with just a strip of roll roofing on top of 30# felt. Looks good. __________________ And now I'm finished posting.