I’m not familiar with that system but give him a call and if he is a reputable roofer he will pop back out to sort it. Sometimes when fitting gutters it’s easy to snag a rubber and we don’t realise till it rains.
I would have done away with the pipe and had the gutter flow towards the house main roof. It’s only a short run. It would have dissipated on its way down before reaching the lower gutter and there would’ve been no splashing.
The end caps don’t stop the panels from slipping. The snap down top portion of the glazing bar does this. The end cap is simply decorative and hides all the joins.
Shyte from the roof is making it's way down the render. The dry verge caps seem to be at their most extended towards the top. I'd like to see a pic of the roof when the dry verge butts up to the tile!
It’s a lot of pipe and faff just for that porch, plus any 90 degree bends will drip unless you gunk them up. Miniflow will get blocked as soon as a leaf drops in. Personally I’d do a little mini soak away in the front garden
You could use a self support poly system 35mm opal heatguard. Bars are 100mm high so you’d have to create a little mini flat roof valley at the top. You need at least 1 supporting purlin in the middle.
working with those slates though….:censored: