When a dormer on a tile roof is covered with zinc, first the valley gutters are placed along the side bolsters of the dormer. These gutters will be connected to the existing standard gutter. The gutters are placed at the roof and to the side of the dormer by means of clips.
The side bolsters are fitted as façade cladding and secured with clips to the underlying wooden structure. The preference is for a standard system cladding such as a standard seam system. For small surfaces there is also the option of sheets connected to each other using hooked edges. The hooked edges also contain the clips for fixation to the woodwork. The clips must allow adequate expansion of the side bolsters, to prevent bulging.
Joints and connections should always have sufficient space to guarantee the thermal movement of the zinc. Especially with this kind of application it is advisable to fit the coverings prior to soldering, clipping or seaming to prevent problems due to the thermal effects. Only then it is possible to perform correctly with waterproof details.