I’m reroofing a 4/12 pitch roof that had 15-year-old IKO three-tab asphalt. After removing the shingles, I noticed an odd construction. The builder covered the eave with Ice&Water, then shims to give some overhang, then drip edge, then shingles. The shims positioned the drip-edge a few inches out from the fascia.
Is it good to do the same thing on my rebuild, or should I eliminate the shims and just position the drip edge 1/2" past the decking?