u/BassUsed

Hello guys, I am seeking advice how to finish this roof (which was not finished by the original builder and abandoned). I hope I am in the correct subreddit.

For reference the house was built in 1883.

We need to add one more rafter on the edge so the corrugated metal roof is not hanging. Unfortunately the current last rafter is on the edge of the attic and this new "last" rafter will lay on the gable end of the house. The gable end is made from bricks / rock and we are afraid of drilling into it to add metal rods and chemical anchor.

Approximate location of the needed rafter is in the pictures marked by orange.

We can remove the edge corrugated metal roof to get access from above.

Any help is appreciated.