[Dan in Pasadena]

Jake, I'm on the other side of the world from you...almost literally in terms of weather. New Brunswick Canada and Southern California! But I have a large (15-30) shed addition to my garage that has a pitch at least as low as on that porch, if not lower. It leaked like a sieve and I had a guy do it with the hot melt roofing - is that what you mean by "peel & stick"? The stuff I am talking about sorta looks like normal compostine shingles in appearance (the little gravel on the surface) but it is a rolled product with black cr@p on the back that melts onto the roofing surface with a roofer's propane torch (uses a 5lb propane tank and a long handled torch). As you roll it out, you use the torch to melt the black stuff and lay it while hot and plastic and it sticks like crazy when applied to the roofing surface. Of course make sure your sheathing is sound and un-rotted. Mine is tight as a drum. Best of luck.