The full installation specs of Grace is that you install the membrane over the plywood and wrap down over and to the bottom of your "rough fascia" then install the dripedge and your finish fascia and shadow board to cover the Grace.
If the water runs under the drip edge and in behind the shadow board and your fascia there is a simple fix that is severely overlooked by contractors and that is to BACK PRIME all exterior trim to prevent moisture from being absorbed by the wood.
Or you can do what we do and apply according the manufacturer specs, install drip edge, put a six in strip of Grace Tape over first 1" of drip edge and onto the first layer of Grace and apply non-finger jointed pre-primed exterior trim.
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