Guttering Design - open gutter end or downpipe?

[Nick Laslett]

I have 2 short sections of roof where I’m not sure if I even need a gutter. See photo, yellow lines are the gutters, red lines my solutions. 

 

My first thought is to let the water run out of an open ended gutter onto the lead valley. Number 1 on drawings. 
 

Or put a downpipe to take the water to the gutter on the roof below. Number 2 on the drawing. 
 

Or no gutter at all, as 90% of the roof falls onto the roof below. 
 

Any thoughts appreciated. 

[PeterW]

Yes you need a gutter …!

 

and don’t direct onto the lead, it looks messy …

 

This is how we tend to do it with dormers - this is Brett Martin deep flow and the shoe is pushed tight on to the outlet spigot (sorry about crap photo !!)

 

 

 

[Nick Laslett]

On 30/10/2022 at 09:52, PeterW said:

Yes you need a gutter …!

 

and don’t direct onto the lead, it looks messy …

 

This is how we tend to do it with dormers - this is Brett Martin deep flow and the shoe is pushed tight on to the outlet spigot (sorry about crap photo !!)

 

 

 

Thank you, Peter. The photo is fine. 
 

Would you do the same with a pitched dormer?  Looking around there seems to be no consistency how these are treated. 

[PeterW]

@Nick Laslettthat is a pitched dormer ..?

[Nick Laslett]

2 minutes ago, PeterW said:

@Nick Laslettthat is a pitched dormer ..?

Sorry, I mean a gabled dormer window. 
 

 

I’ve not got a photo handy. It is higher up on the roof than the picture. 

[PeterW]

@Nick Laslett like this ..? Better shot 

 

 

These are full lead dormers as a row of 3 in the roofline, all have dual gutter with the shoe on the outlet 

[Nick Laslett]

39 minutes ago, PeterW said:

@Nick Laslett like this ..? Better shot 

 

 

These are full lead dormers as a row of 3 in the roofline, all have dual gutter with the shoe on the outlet 

Yes, like this, but not full lead. Thank you. 

[Redoctober]

@Nick Laslett just in support of what @PeterW has suggested - a photo of our set up - 

 

 

[Nick Laslett]

2 hours ago, Redoctober said:

@Nick Laslett just in support of what @PeterW has suggested - a photo of our set up - 

 

 

@Redoctober thanks. Hard to tell in the photo, but it looks like the dormer window gutters are emptying into the lead valley. Is that the correct?

Edited November 1, 2022 by Nick Laslett

[Redoctober]

1 hour ago, Nick Laslett said:

@Redoctober thanks. Hard to tell in the photo, but it looks like the dormer window gutters are emptying into the lead valley. Is that the correct?

 

I'm not sure if that is considered to be the correct / best practice, but I do see on @PeterW  photo, his have a short downpipe. That said, I have not experienced any problems with this approach so it may just be a case of either or? 

[Temp]

On 30/10/2022 at 09:41, Nick Laslett said:

I have 2 short sections of roof where I’m not sure if I even need a gutter. See photo, yellow lines are the gutters, red lines my solutions. 

 

My first thought is to let the water run out of an open ended gutter onto the lead valley. Number 1 on drawings. 
 

Or put a downpipe to take the water to the gutter on the roof below. Number 2 on the drawing. 
 

Or no gutter at all, as 90% of the roof falls onto the roof below. 
 

Any thoughts appreciated. 

 

We have just about every combination on our house. Some dormers the rain just runs off the tiles onto the roof below but the larger ones have a gutter that runs it from left to right (in your picture) then  has a short down pipe that deflects it out across the roof..