Porch hip roofing question

I'm am singling a 2/12 pitch roof. It's on my unheated porch. I am covering them entire roof with ice and water shield. Am I supposed to cover their roof with felt paper or just put shingles over there I&W shield.

I have another thread going on this job but can't find it posting from phone.

Thanks in advance

The other missing thread.... http://www.doityourself.com/forum/ro...-hip-roof.html

 

Shingles over the ice and water is fine. Be sure you lapped it sufficiently for your low slope roof. (2:12)

 

And read the install directions for the shingles.
Most will have special directions for a low slope.
Some company's would not even warranty there shingles on that low a slope roof.

 

Is a 6 inch over lap enough?

 

Follow the instruction on your package, using the standard overlap. There are no special overlap instructions for shingle application. Low slope instructions are for the underlayment only. Lowering the lap of the shingles for more coverage can change the way the shingle hits the tar strip.

As Certainteed states:

NOTE: Some roofers choose to apply shingles at 4" exposure
(vs. standard 5") at slopes less than 4/12 in order to increase the
wind-driven rain resistance. In some cases, this can be an acceptable
practice, but there are risks for which CertainTeed will not take
responsibility. A shortened exposure can harm the appearance of the
applied roofing, especially those with shadow lines, and it can reduce
shingle ability to resist wind blow-offs by shifting the adhesive seal line
away from the bottom edge of the shingles.

 

Thanks for the replies.

Joecaption I didn't see your post before asking if 6" over lap was enough.

 

On a 2/12 that's not enough shingling. YES you need to use felt paper but realistically you should be using something like rhino guard or a stronger underlayment.

 

GAF website calls for double coverage of felt paper on roofs with 2:12 to 4:12 pitch. I figured covering roof with I&W shield would give added protection.

Would it hurt to use I&W shield under and over the drip edge? I figure the first sheet I will cover the top edge of facia board. Then attach drip edge the add a second layer of I&W shield. I've read differing opinions on whether I&W shield goes under or over drip edge. Manufacturer says over drip edge but that doesn't protect facia board very well.

 

It is enough. Yes, done properly, over and under works well. All mfg's i know of say under... so no difference of opinion there.

 

The Grace I&W instruction say drip over the I&W which makes sense to me, but I'm not a roofer

Thanks for the input

 

Yeah when I said under, I meant the ice and water goes under the metal.