Old Velux Window Flashing

[The OtherPete]

Hello,

I'm hoping someone can shed some light on the flashing on a Velux window.

The skylight was installed when I moved in so no idea what the history is. However, the ceiling around it has showed signs of minor leaks.

Recently we replaced a flat roof on an extension and the contractors lifted the tiles to replace the boards and insert the rubber under the lower row of tiles. From then we had a major leak.

Sure, I could get the flat roof ripped off, but the problem is higher up and I know the whole roof needs a re-felt.

What I need advice on is the installation of the Velux and, more importantly, the flashing. The leak we have now is due to a "channel" in the flashing along the lower edge of the Velux. It just looks wrong - hacked to fit even. How does that drain?

Surely this isn't normal?

Any advice appreciated!

 

[datarebal]

the picture shows the side of the front apron before it comes out over the tiles.
simply lift a tile or two on each corner and bend them back on their selves a little.
the water can not then run sideways.
its a common problem with the poorly detailed .