Installing Velux windows

[djcdan]

We've been supplied a GGU Velux with EDW flashing kit from our kit supplier. I'm fitting the first window today.

 

I'm confident the window and flashing kit provided have been installed as intended, but it seems that this system should also have been installed alongside the BDX foam collar and accompanying gulley that fits above the Velux.

 

Our roof is counter battened. With the EDW flashing kit alone, it feels as though water could enter under the EDW flashing (which sits completely above the battens/counterbattens) should rain or condensation should find its way beneath the roof covering.

 

Has anyone installed the EDW kit alone without the BDX kit?

Edited July 18, 2021 by djcdan

[tonyshouse]

I have installed thousands of Velux windows to loads if different roof and roof coverings, never had any leaking, never used additional kits but always careful with membranes and aim for fail safe 

[Cpd]

Any photos ? 

Edited July 18, 2021 by Cpd