lead flashing advice

[tireetim]

Hi,
I've got a front porch that is against a rendered wall but the flashing is not correct and is leaking. Currently there is a bell cast at the bottom of the render and the flashing is just tucked up to underneath it. How should I do this properly? I will replace the lead but can I cut it into the render higher up above the bell cast? If I take the render off to cut the flashing into the bricks behind there would be a unsightly gap in the render line (it's goes up diagonally so would need to be stepped if I cut it into the brick). I don't think rendering over the lead would be a good idea to cover the gap. Easiest would be to cut a straight line in the render higher up but is this ok?

Untitled

• tireetim
• 9 Jul 2013
• 1

Thanks.

 

[dann09]

A few pics please, showing more roof to wall detail, esp where the wall /flashing meets the gutters.

The dark shading that follows the roof line above the flashing is a typical indication of damp in or behind the render. Has any remedial work been done besides the porch roof?

Where the flashing discharges into the guttering you need "kickout flashing" ( google it ) to stop water going over the gutter.

Working on that roof without a platform will be awkward, but anyhow, perhaps remove the in-place flashing, and clean and inspect the lead and the area. Post a close-up without the flashing.

Google details of how roof flashing goes up the wall a little and separate cover flashing comes down to cover it.

Then come back here. You might have to grind a slot above the bell cast and insert cover flashing.

 

[tony1851]

Taking the flashing over the bell-cast would look a bit awkward.
Within reason, you can cement-render over lead flashing (my 1920s house has it with no problem).
This would avoid you having to do a stepped flashing. Mix a bit of PVA with your cement render mix, and coat the exposed lead with PVA in water. This helps it adhere better.
Suggest keep the flashing fairly narrow - say 3-4". Make sure it is tight against the wall, with no undue flexing.