How much overhang to gable end?

[jmsgld]

30 year old roof with no overhang to gable ends, Complete re-roof starting on Monday .
There has been water ingress at one gable end particularly where the water runs down the wall and gets under the render and also in through a rotten window.

We have planning permission to extend the overhang by up to 300mm. The roofer has suggested that it only needs a 50mm overhang. I would have thought the more the better in terms of protection from rain?

Reclaimed clay double Romans, 4"x2" rafters at 36cm spacings, end rafters will be rotten so will be replaced , celotex In between and multifoil over.

Any roofers on here comment ?

Thanks, James

[wolfracesonic]

50mm is usual for most 'standard' situations, where the slates/tiles finish on cement verge cloaking or edge trim, but a bigger over hag would protect the gable better: This would involve forming what's known as a gable ladder i.e structural timbers projecting out past the masonry, combined with facia and soffit boards. As for how much depends on the aesthetics really and the style of building, 200mm?

[ATTAK Z]

H

wolfracesonic said:

50mm is usual for most 'standard' situations, where the slates/tiles finish on cement verge cloaking or edge trim, but a bigger over hag would protect the gable better: This would involve forming what's known as a gable ladder i.e structural timbers projecting out past the masonry, combined with facia and soffit boards. As for how much depends on the aesthetics really and the style of building, 200mm?

Exactly this ^^^

[B17NNS]

wolfracesonic said:

This would involve forming what's known as a gable ladder i.e structural timbers projecting out past the masonry, combined with facia and soffit boards. As for how much depends on the aesthetics really and the style of building, 200mm?

This would make for a far nicer job.

[jmsgld]

Great, thanks for the replies.

I would be much happier with an overhang of say 200mm, now I understand what I want It / how to achieve it, itwill be much easier to describe to the roofer.

[herewego]

We have two gables, one at the front, one at the back. The front one has at least a foot standout with shaped barge boards, the back is flush.

[wolfracesonic]

^ I meant to say barge boards, not facia boards OP. What a rookie mistake