rain water into cavity casuing damp

[Wasted]

Hi,

I have a problem with a roof where the gutter has been laid horizontally on lead only covering the outer skin of the cavity wall.
Consequently some rain is driven under the gutter and into the cavity. where the gutter is horizontal, there is no adequate run off to the downpipe and pools accumulate in the gutter.

Also, the the lead has been perforated in an attempt to secure the guttering.

The difficulty with this property is that the neighbouring property is very close and the distance between the facing walls is only 18" to 2' along the length of the building.

I will try and upload some photos but this will need to wait until the weekend.

Is it possibly to finish this flank of the roof with traditional facial and guttering or or can it made made watertight in any other way.?

Is their an "industry standard" method for this type of finish?

Thanks

Mark

 

[masona]

I will try and upload some photos but this will need to wait until the weekend.

That's the best way for the correct answer

 

[^woody^]

This seems like a typical arrangement at the boundary, where the eaves are designed not to project past the property boundary.

If detailed and done properly, there should be no problems.

The lead should be sufficiently overlapped and joints lipped or siliconed, and the gutter should only be fixed through the gutter bracket hole. The lead should have enough upstand and be tucked under the first eaves tile to seal against wind driven rain

The lead under the gutter should be angled slightly towards the external face to prevent rainwater ponding.

If this is done correctly then it is water tight.

Unless you are prepared to strip it all off and re-do it, then it may just be a case of geting up there with a tube of silicone and some flashband.

 

[Wasted]

Thanks for the info.

Would a shallow facia board be required or should the gutter be fixed to the cut end of the rafter?

Mark

 

[^woody^]

Yes, good detailing and practice would be to fit a fascia which will give the lead a solid backing and allow the gutter to be better fixed.

Fascia would also support the felt and/or eaves tray which then drapes into the gutter