Hi, My first post on this site. I am a chippy, have been for 30 yrs or so now and am quite familiar ( but by no means an expert) with most aspects of building but am a bit stumped with this one.
I have a bare external wall on my house which needs rendering, the top edge and two sides are straightforward but the bottom edge is where I need some advice. It has a flat roof up against it with the felt coming up it approx 150 mm and then lead flashing chased into the wall and dressed down over the felt. I therefore have a ledge of lead around 25mm wide which the render comes down to. If I do not use a bead and just sit the render on top of the flashing, I am left with a direct horizontal route for water to penetrate over the top of the chased in lead straight into the wall. If I use a normal stop bead, (exterior quality of course), it will leave the same situation. What I could do with is some sort of bead which can fix to the wall, sat on top of the 25mm lead ledge but projects slightly over the lead's vertical face with a profile creating a drip mould, as it were, just something that points down slightly so that water running down the face of the finished rendering, gets caught on the tip of the bead and drips onto the face of the lead rather than travelling back into the wall along the top of it. Thus achieving pretty much the same as a window cill or external door frame, capillary groove.
I have had a look around, had bellbeads suggested but when found, they don't seem to be what I had hoped for. I think I could possibly achieve what I want by using a normal corner bead but then flattening it and just leaving the nose sticking out over the face of the lead but would rather use the correct thing.
Sorry to waffle on a bit but it's not that easy to describe, would be nice to submit a sketch but not sure how to if possible.
Any advice would be most welcome....thanks for reading.
I have a bare external wall on my house which needs rendering, the top edge and two sides are straightforward but the bottom edge is where I need some advice. It has a flat roof up against it with the felt coming up it approx 150 mm and then lead flashing chased into the wall and dressed down over the felt. I therefore have a ledge of lead around 25mm wide which the render comes down to. If I do not use a bead and just sit the render on top of the flashing, I am left with a direct horizontal route for water to penetrate over the top of the chased in lead straight into the wall. If I use a normal stop bead, (exterior quality of course), it will leave the same situation. What I could do with is some sort of bead which can fix to the wall, sat on top of the 25mm lead ledge but projects slightly over the lead's vertical face with a profile creating a drip mould, as it were, just something that points down slightly so that water running down the face of the finished rendering, gets caught on the tip of the bead and drips onto the face of the lead rather than travelling back into the wall along the top of it. Thus achieving pretty much the same as a window cill or external door frame, capillary groove.
I have had a look around, had bellbeads suggested but when found, they don't seem to be what I had hoped for. I think I could possibly achieve what I want by using a normal corner bead but then flattening it and just leaving the nose sticking out over the face of the lead but would rather use the correct thing.
Sorry to waffle on a bit but it's not that easy to describe, would be nice to submit a sketch but not sure how to if possible.
Any advice would be most welcome....thanks for reading.