

The roof of the new building will be taller than the one seen. That's why I need ideas. I only have to put a gutter butyl? Between that roof and the new wall?
Of course, that roof is going to drain against the wall of the new roof, not only are you going to have to stuff a gutter, you are also going to have to cut those sheets. At least it's what I understand
I thought, out there put a valid crusade to dodge that part of the roof and lift the little that is missing over the current one, and put a bib type that deflects the water
Don't you dare to make a little sketch with the distribution of the new roof and its fall?
There I attached another image of the part that I have to roof. The idea is to two waters 5 meters ahead and 5 back. It will be about 10 cm ppr meter. There in that tip is 40 cm higher than the previous one.
In the image you see that row that I made as scanned that is with 6 iron and cement. But they told me there is little to do in a row with bricks or more concrete. But I could not make the new roof under that one.
If you mount a roof with another, there is nothing left but to put a gutter to drain it to another side
As for the chained one it has to be well done because those bricks are not bearing.
If you want to maintain that height it will be convenient to break the hollow bricks of the last course, make a formwork or boarding and concreting
I leave you a link that will serve you to do the chaining is in the second pdf, but take full advantage that is good
https://www2.yoreparo.com/hogar/construccion/manuales/5823974/manual-construccion-casas