Guttering issue

ryan7

Jeepers_Creepers said:

I think you need to figure out why it's overspilling first, Benson, and for that you'll need to wait until it teems down again (darn this dry spell...)

It'll either be due to the sheer volume and speed of water coming down that focused spot, so some of it completely overshoots the gutter or just splashes against the outside edge of it, in which case the solution is probably deep-flow guttering or some clever adaptation like wot Belenus suggested, or some other contrived solution like a raised extra rim along that outer gutter edge (made from a short length of similar gutter dropped in, and pulled up that side - and glued in place.)

The other cause could be that the existing gutter contents isn't being drained away quickly enough, so the gutter is already partially filled so this extra water overflows with its sideways force. In which case checking gutter levels (sloping enough and the correct way), checking that the DP and drains are free-flowing, or swapping to deepflow guttering as before could solve it.

So, you need rain, an umbrella, and a ladder. Enjoy... 

All they need to do is open the upper window and pour water from a jug to mimmick rainfall. 

Slinky

Hardly think a jug is likely to be representative of the volume of water that causes them problems.

OP we had a similar issue when we had an extension built on our old house and half the existing house's roof was feeding down onto the roof of the extension. Where the gutter turned at 90 degrees around the corner of the new extension, we had it pouring over the edge. Initially there was a lot of grit coming off new tiles, but it still happened even after we'd cleaned the gutters out. We had them replaced with deep fill, and it cured the problem.