Boiler Flue / Flashing

[blackpooluser]

Not sure if this should be under plumbing, but here goes:

The flashing for my boiler flue is sticking up on the under sidfe of the square.

This means there are no leaks so far, but my Dad is going to go up there and possibly pull it flat down and seal it.

Because it sticking up on the underside, so far the water must be running off the sides, rather than in.

What do we use to "stick it back down"

Apologies for the poor descriptions, I'm not very DIY !!!

Thanks in advance

 

[RoofingDave]

Hmm, can you try and explain in a little bit more detail, the Flue is coming out vertically from the roof?