Stone Veneer

How do you interface roof shingles with a stone wall made with highly irregular stone shapes?

I have found several articles on the internet about roofing and how if you have a wall with stone veneer there are metal flashing products that fit in the mortar lines, lay vertically along the stone, and then pass under the roof shingles. What is done when large, irregularly shaped, real stones are used in a stone wall (think slipformed riprap or similar) that is higher than the roofline? How do you keep water from leaking between the wall and the roof?

Caulk is a bad answer.

You will need some type of flashing that will allow some molding to the rock in addtion to removing some of the grout (mortar) between the stones and then repointing (reinstalling the mortar between the stones. Another option, depending on your particular circumstance, may be to get an abrasive blade for a skil saw and score a straight line in the stone about 6" above the roof line. You would then insert the edge of the flashing in this groove, bend it to fit tight against the stone, bend it again at the roof deck where your shingles are, and then caulk or put mortar in the groove.

If this doesn't work, you may need to grind or chip the stone to make an area flat enough to apply the flashing.

Copper can be used, I have seen lead sheets used too.

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