Hi, I need a second opinion on some work I had done recently on my home.
I live in New England and have a traditional wood colonial built in 1996. I hired a contractor to replace some of the rotted casing around the windows (vertical boards only) and chimney box, and some of the clapboards. For the windows, he caulked the gaps between the clapboards and the vertical casing, but for the chimney box he left a lot of the gaps between the clapboards and the corner boards unsealed. He did seal the gaps for the bottom 10 feet or so of the chimney, but most of the upper part, including above the roof, remain unsealed and there are some pretty good sized gaps.
When I asked him about this he said that it wasn't absolutely necessary to caulk these because the house is sealed underneath with Tyvek and the moisture would run out anyway and not cause water damage. He's an experienced carpenter and I trust his judgement, but it seems to me that all of the gaps should be sealed up to protect the house from the weather. The corner boards appear to be caulked in everywhere else on the house from the original construction.
So my question is, is caulking standard practice for repair jobs like this on traditional wood clapboard houses? Thanks.