Elroy Jetson said...
I install gutters only on Pergolas.
With all the different styles of gutters, house roof plumbing is a job in itself. I refer all house gutter jobs to John's roofing.
I can PM you his number if you're interested.
I wouldn't worry just yet if you have gutters that normally drain fine but leaked/overflowed during the storm late this afternoon. I would guess that 90% of Perth residents in the path of the storm would have had overflowing gutters during today's intense downpour.
Just emailed your contact site to my daughter in Joondalup. their patio looks a little like the one you put up

Didn't get any hail in Carramar

but the gutters back washed into the eaves and ran a river out through garage

Fortunately I was watching on rain radar at work, called wife who was out in direct line of impact zone, and recommended she head home and put my favourite toy back in garage (Cruiser) First up she said "its sunny out side, until she looked North

then thought, I have seen this before in Sydney many moons back and headed home safe garage