Q: We ordered preprimed HardiePlank lap siding to finish a project, but when it was delivered, we discovered that the backs were left unprimed. Normally, we back-prime wood clapboards, but I'm not sure this step is needed with fiber-cement siding, and the manufacturer's Web site is mute on the subject. Is back-priming necessary?
Q: The clients on an upcoming project are interested in installing fiber-cement siding, but they're concerned about how the butt joints will look. While they don't expect the tight-fitting seams characteristic of wooden clapboards, they also don't like the look of wide caulked joints. Is there a better way to detail these joints?