roofing. how does peel and stick seal? low slope shingles.

[snowman3]

Looking at building a shed w/ low slope roof. Probably 2:12. Maybe 3:12 if required. Ideally a 1:12 if I could get away w/ it. (trying to keep as much headroom as possible)

Not a huge size so I can put as many layers of "whatever" on the roof. But top layer needs to be 3-tab shingle so it goes w/ house and surrounding buildings.

I can put heavy coverage of felt, "peel and stick". Grace ice and water, etc. or whatever you guys recommend is best way to go.

But what keeps it water tight? The final step is to put a nail through all of it to hold the shingle.

I'm not a roofer, so I'm not seeing how that stuff seals the nail hole.

Arizona. No snow but tons of heat and heavy rains.

 

[csp]

Ice and water shield is self sealing around penetrations (nail holes). That's its major advantage.

Do your homework installing shingles with only 2:12 pitch. It can be done, but there are special steps that need to be followed. Stainless nails should be used.

 

[matt_i]

Grace has a high-temp product that's typically for underlaying metal roofs. But I'd investigate using that due to AZ.