You need to check in which category your flat roof repair fit then you have to decide:
Categories for me:
Temporary flat roof repair – A short term repair can be easy, quick and cost effective. The purpose is to stop the initial leak from ruining your persian carpet and Barry Manilow albums, whilst buying you some valuable time to think over, save for, or get quotes on your new flat roof, or professional repair.
Permanent flat roof repair – Permanent here meaning it will see out the remaining life of the roof covering until it is in such general overall bad condition that a new flat roof is required. Two examples of this would be good quality professional repairs or patches to an otherwise good roof. Or in some instances a ‘layer on top’ of a generally degrading existing roof, which is discussed further down.
The utter waste of time – This is the sort of repair that was never going to last because the roof is so poor, and has possibly made the life of any roofer harder should they come later to repair, or replace. In other words this will cost you more to put right, on top of the cost of the poor repair.