Has anyone come accross the roof guttering that is deeper than the common
semi-circular-section stuff? The half-finished guttering job on the house
I've bought is actually parabolic in section.

I looked in my local (and rather small) B&Q, and strangely, they actually
had some downpipe junctions in this profile, but all of the actual
guttering components they sell is semi-circular section stuff.

My other local builders merchants are Travis Perkins (none there) and
Jewsons. (None there either.)

Since B&Q stocked some some parabolic-section fittings, I can only conclude
that someone, somewhere, is selling the guttering to suit. Has anyone seen
it for sale anywhere? I'm in Dorset.

Many thanks

Al