Roof leak

[Jamespf1]

Hello,

My roof is leaking on my bay window. I think it’s coming through where the lie meets the asphalt. Would gunking it with roof sealant/CT1 stop this?
I know it sounds like a bodge but it’s all I can afford at the moment.

It’s only a small amount water coming through. Not enough to form drips but enough to see water marks.
Thanks

 

[Jamespf1]

Or possibly the broken roof tilt above?

 

[robinbanks]

It's a poor detail to ask bituminous felt to do a hard angle transition like that and stay structurally intact and waterproof through years of heat driven softening/hardening/expansion/contraction.

 

[catlad]

As above I wouldn't know where to start without stripping it all back. You could try slipping some lead under the tiles to carry the water past the problem area.

 

[Alastairreid]

Probably better with Acrypol along that seam at the drip edge as a short term fix.