I have been intending to write an article on a problem I see frequently in new construction, and some old, which are gaps at cornice details at the roof interface.  I see this problem frequently in new construction and in homes constructed in the last 10 years or so.  When I am doing inspection work on homes a few years old, and in a few cases in new construction, I find trails and nests in the attic space where it is clear some type of animal has been living in the attic.

I contacted a manufacturer of fiber-cement product with a query as to whether they require the clearances or not since it is not clearly stated in the specification sheets I have reviewed (these do change from time to time).  They replied with photos of a recommended solution for both new construction and existing construction.  In existing construction this will require removal and reinstallation of some cornice detail materials.

The article and details can be found by clicking this link.