Internal truss rafter is wet

[thesmoothound]

After some advice. I went into the loft at the weekend and notice one of the beams was wet. I wen't and took a closer look as checked the membrane. All seemed to be OK. I inserted some flashband in between the beam and the existing felt and also silicone down the sides. Went up to loft again to check if it had helped and the beam was very wet again.
Any suggestions on what else I need to check? Thanks.

 

[noseall]

Any suggestions on what else I need to check?

I doubt you'll fix that from the inside.

 

[catlad]

Probably a cracked tile.