roof valley overflowing leading to wet wall

pinn73 · 17 Aug 2020

Hi,

As the title says, when there's heavy rain, it pours down the valley and floods over the corner guttering. This has meant the exterior wall has got wet and has soaked through to he interior wall. I have seen diverters for sale or it there a better option available?

Thanks

Mw Roofline · 17 Aug 2020

That’s a small valley. You don’t need a diverter. You need a competent roofer to sort the valley out. Don’t use whoever looked at it before who used chewing gum to repair it.

pinn73 · 18 Aug 2020

Mw Roofline said:
That’s a small valley. You don’t need a diverter. You need a competent roofer to sort the valley out. Don’t use whoever looked at it before who used chewing gum to repair it.

Yes, it's not massive. The bodge job was a stop gap until I got new tiles bought but do you think that's responsible for the overflow? Ta

datarebal · 18 Aug 2020

Bodges rarely work.
The bottom valley trough is damaged . The mortar slapped in there and the tile joins will just make things worse.
Strip the valley out, replace the troughs in grp or lead and problem solved.
You will have to replace it before long 100%

pinn73 · 18 Aug 2020

datarebal said:
Bodges rarely work.
The bottom valley trough is damaged . The mortar slapped in there and the tile joins will just make things worse.
Strip the valley out, replace the troughs in grp or lead and problem solved.
You will have to replace it before long 100%

Thanks for the advice. Any recommendations where is good to buy? Found this on ebay but unsure if a decent price or not? https://www.ebay.co.uk/itm/Ariel-Dr...sh=item2621789049:g:MgkAAOSwWk1eIFXm&LH_BIN=1

datarebal · 18 Aug 2020

That's a grp for slate.

You have two grp choices

My choice would be grp Valley trough for tiles, it has a bonded grit strip for your mortar to grab.

And the other is a dry tile valley more suited to fit and requires no mortar.

Any roofing merchant will sell.
As would a lot of builders merchants

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roof valley overflowing leading to wet wall

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