When tearing off the existing roofing, all the water harmed boards and also plywood have to be changed. The walls should be dry and debris complimentary. The water and also vapor barrier should after that be fingernailed or stapled about two feet apart in order to secure it securely. Once the very first panel is in area, the adjacent panel gets mounted ideal following to the preceding panel developing a connecting factor at the seam. There are types of locking mechanisms for standing seam; snap on, which as the name suggests, obtains placed over and also snapped on top of the coming before panel. The 2nd kind is the field formed seam, which calls for special flexing tool to securely secure the joint.