Best practice to caulk clapboard and corner board area?
It seems that general practice is for the intersection of horizontal clapboards and corner boards to be caulked…a bead of caulk over this intersection after siding installation. But I’ve also seen advice about not doing this because the caulk can/will fail and trap water.
Our specific details are quarter sawn spruce clapboards and pine corner boards with a 3/8″ ventilated rain screen (Cor-A-Vent Sturdi Strips). Clapboards were primed on all sides from mill…and all remaining sides/cuts were stained by us during installation. We did use caulk during installation and kept joints tight, but things shift over time/seasons. Two story building with 18″+ overhangs. I think the ventilated rain screen would be a factor as it will help the siding and trim dry out better. There are more Sturdi Strips behind the corner board area, so not as much air space as the overall wall area.
Any wisdom from the GBA community…..definitely do a good job caulking this area because it will seal out water? Or skip the caulk because the building details (rain screen, overhangs, etc) should keep the siding/trim dry?