in a preferred embodiment of the roof installation system said system comprises at least one first and one second separate from the first fastener wherein the first fastener is provided for attaching a first longitudinal edge of the roof installation support and the second fastener is provided for attaching a second longitudinal edge of the roof installation support in addition at least two first fasteners and at least two second fasteners are preferably provided therefore according to a general concept of the present invention a plurality of separate fasteners that are associated with a respective roof installation support are provided within a roof installation system as a result in combination with the flexible base plate section and the comparatively stiff profile section even given uneven bases a reliable fastening of the roof installation support can be synergistically achieved at least one first and one second fastener are preferably provided wherein the fasteners have a u201c u shaped profile section with the openings of the u201c u u201d of the first and of the second fastener facing one another such a construction facilitates the fastening of the roof installation support in particular use is made of the fact that the separate fasteners can be moved and or tilted relative to one another before fastening so that the longitudinal edges of the roof installation support can be introduced into the profile sections by tilting this would not be possible for example with fastening sections constructed as fixed relative to one another advantages and uses of the invention also result from the following description.