Roof edge trim is a profile used to finish a roof perimeter. The visible profile interacts with the covering and other edge components. Its name does not automatically explain the complete waterproofing arrangement or how the components are fixed.
When new trim is proposed, identify the edge concerned and the adjoining components included. Replacing a profile is not necessarily equivalent to renewing the entire perimeter. Have the transition to retained materials described explicitly rather than assumed from a product name.
Shape, material and fixing need to suit the selected detail. This page provides no installation specification or interchangeability guarantee. Record what was actually used and its relationship with the covering so future maintenance does not have to rely on a generic description.
Worth asking
Frequently asked questions
Is trim always the complete roof edge?
No. The profile is only one component of the transition.
Does neat trim prove a sound concealed junction?
No. Appearance does not reveal every underlying component.