Seal between roof and brick wall

[Joakim Jokko Pettersson]

How have you made the underfelt tight against the brick, isn't that actually more important than the flashing you've installed now?
Wouldn't it have been better if the flashing was under the roofing felt?

Now I don't quite understand... don't you still want to prevent the water from reaching down to the underlay?
And then it wouldn't be tight between the tiles and the wall, and the joint between the flashing and the felt might be wrong.
Or did I misunderstand you?

Or are you referring to the apron flashing?

However, I have the underlay slightly raised against the brick wall and secured/sealed with adhesive and compound.

 

[Stefan1972]

Most of the time, things get complicated, and now I don't know what's customary and what's not, but you can't think that it should be the metal that is the seal and that the underlying roof is built accordingly. Of course, the roof and paper must be constructed in such a way that it's sealed even if there isn't any metal there at all. It's the same with roofs in general; it's not the outer roof that is the "seal."

 

[Joakim Jokko Pettersson]

Most of the time, things get complicated and now I don't know what is customary and not, but you can't think that the sheet metal should be the waterproof layer and the underlying roof is built accordingly. Naturally, the roof and felt must be constructed in such a way that they are tight even if there is no sheet metal at all. It's the same with roofs in general, the outer roof is not the "watertight" part

I agree. Of course, the underlayment should be the watertight part. But when it comes to sealing between the roof and the brick wall in this case, it seems to me that the sheet metal is of utmost importance and that it's critical to get it sealed there, but I don't know. Maybe that's incorrect.

However, I can't see how you could get only felt against a brick wall completely sealed over time. The upward turn of the underlay against the wall causes the seam to be exposed upwards. Normally you'd want an overlap so that the seam/overlap faces downward in the direction of the roof slope, so to speak. Also, brick has a certain absorbency when it comes to water, which over time could mean that such a seam would come undone.

I'm just thinking out loud and hoping a professional can weigh in.

/jocke