Gables, accents and whole walls
Cedar shingles frequently cover only part of a house, such as a gable end, a front bay or a band below the eaves, with stucco or lap siding on the rest. That mix changes the job, because the shingled area may want stain while everything around it takes paint.
On an accent we mask the stucco and trim edges tight to the shingle line and keep stain off the neighboring surfaces. On a whole shingled wall we work a wet edge course by course, since a semitransparent stain that is lapped over a dried edge leaves marks you can see from the sidewalk.
The gaps between courses are left open on purpose. Shingles need room to swell when they get wet, and shingles laid too tight buckle; caulking those gaps would trap water and cause the same failure. Split or cupped pieces are replaced with matching cedar and finished to blend.
On the bluffs and on the west side, where Torrance meets Santa Monica Bay, mornings can stay damp, so staining starts once the wood has dried for the day.