A roof tile mounting system is disclosed, having a plurality of T-shaped metal footings each configured for detachable fixing of one tile through a snap fit locking mechanism. The mounting blocks are attached to a deck arranged in rows parallel to deck ridge. Each metal footing includes male and female features for side-to-side and row-to-row alignment of the metal footings when being fixed on the roof deck. This makes the process of tile mounting easy and less time consuming. The metal footings further include extended arm for tile support, rail guides for mounting guidance and misalignment prevention, and pad mounting provision for water ingress to a successive tile. The tiles include guide springs that engage with the snap fit locking mechanism for detachable mounting and push back springs to provide push back force during mounting.

A multi-part roofing underlayment having independent release liners, where the underlayment comprises separable portions attached adjacent top edges of the separable portions, creating an interface therebetween into which roofing components may be inserted, easing installation and better mitigating wind-driven rain and ice dam related roof failures. Embodiments provide the multi-part roofing underlayment in sheet and roll forms and with various configurations of release liners, adhesive layers, granular layers, selvedge edges, and plastic layers.

Tile fixing devices, tile mounting methods, and roofs, such as those associated with solar tiles, are provided. For example, tile fixing devices related to the technical field of photovoltaic power generation are provided. In one illustrative implementation, a tile fixing device may include: a tile hook which is provided thereon with a fixing piece configured to cooperate with the mounting hole of the tile, as well as a positioning structure configured to limit the tile batten. Various tile mounting methods and roofs are also disclosed.

A multi-part roofing underlayment having independent release liners, where the underlayment comprises separable portions attached adjacent top edges of the separable portions, creating an interface therebetween into which roofing components may be inserted, easing installation and better mitigating wind-driven rain and ice dam related roof failures. Embodiments provide the multi-part roofing underlayment in sheet and roll forms and with various configurations of release liners, adhesive layers, granular layers, selvedge edges, and plastic layers.