In this October 2012 thread, contractors provide a variety of solutions for building up exterior trim to better complement the thickness of cedar shingles.

I have used plenty of 5/4 trim with shingle siding, but would rather use thicker trim. I was thinking of going with 4/4 material (3/4" net) boosted out with some scrap 7/16" OSB. With this arrangement, my casings … would be about 1/4" proud of the shingle butts. What do you think? — IamTheWalrus

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