re: Replacing cedar board siding with Hardie Board

I agree with poochie, you had a crap installation if that was happening. I had a crap installation 2 houses ago - there is no way the company who did it (previous owner, not us) had done it before. All kinds of gaps on the sides, and seeing light come through along the diagonal of the big gable side. Didn't do proper flashing anywhere. So glad we move before really having to deal with it. In the house before that, it was newly built with hardy and everything was tight, no issues at all. You just have to find people who know how to install it properly.