mickreed

I am having trouble with butt joints cracking. Almost all of them. Joints sealed with Vulkem 106 and installed exactly per instructions of both Hardie and Vulkem at the time. I noticed Hardie has changed their butt joint installation instructions since this house was built 5 years ago. I just want Hardie to tell me why the joints failed and what can I do to fix it. I myself know of 4 other people in my area with exact same problem. Here are some pics. Image Insert: 556.73 KB Image Insert: 414.82 KB