Kerb edge to drip edge detail confusion (EPDM)

[paulweller84]

Hi,

I am designing my own flat roof for a 6m extension. The two long sides will have kerb edges and the rear edge will be a drip edge into a gutter. Due to the length of the building the upstands on the corners will be around 100mm, this means the kerb trim and the drip trim will not meet in the corner, therefore standard corner trim pieces wont work. I have tried researching this online and can't seem to find A. any product to overcome this, or B. any photos that clearly show this kind of design.

Drawing attached for clarity

Thanks

 

[Alastairreid]

I don't understand why you have 100mm kerbs.
What is the covering, epdm?

 

[paulweller84]

I don't understand why you have 100mm kerbs.
What is the covering, epdm?

Yes, EPDM.

The roof length is 6000mm, so the total fall height is min 80mm from high to low.

 

[Alastairreid]

The kerbs for epdm are designed to work in tandem with the drip edge.
The kerb runs in line with the roof.

 

[paulweller84]

The kerbs for epdm are designed to work in tandem with the drip edge.
The kerb runs in line with the roof.

It seems as though the trims and corner pieces that come with EPDM kits are only really designed to work with level flat roofs, or those with very small slopes. I think if I want a tidy corner detail piece to cover a big upstand like this it needs to be custom made.

 

[Alastairreid]

Can you post a pic of your roof?