Exhausting through Tiled Roof (with Sarking)

Does anyone know who I would call to get an exhaust fan for bathroom and rangehood for the kitchen exhausted out through the tiles of a roof?

I don't want to just exhaust it into the roof as I have sarking and would prefer for it to go external, but i have no idea who I would get to do it (I don't want leaks in the roof later).

Exhausting out through the eaves won't work as the ceiling itself is slightly higher than the eaves itself and the ducting hose won't fit without getting squished.

 

Whirl bird in close proximity to the exhaust fan would extract any moisture. Whirlybirds install into tiled roofs easily be remove a few tiles

 

Google you Rangehood brand it will give you a few installers out Rangehood Qazair needed special ducting which when installed cost more than the Rangehood.

 

This is not anywhere near as good as ducting out correctly. Whirly birds are notoriously ineffective at extracting air (the whirling is deceptive) and they are unlikely to be effective for the grease.

 

Range hood installer should be able to do it.