During some recent research I came across a product that’s new to me. Cedur Shake Shingles. It’s an interesting product which the installation instructions at quick glance included an “interlayment”.
That was my take, I just stumbled across it this looking for something else. After a quick glance I found the “interlayment” and the product as a while interesting. My initial thought was the ‘Trex’ alternative of cedar shake shingles.
Thanks for posting. Lots of these are getting installed around me in WNC. Several of the clubs require shake or slate, but they’re accepting synthetic shake now.