Vinyl siding leaking at corners

[kasoff1]

I have recently installed vinyl siding on an old addition of my house. The addition is above-ground on a concrete slab. The slab is not level.

Two of the corners are showing leaks at the base of the siding underneath the footers. The inside walls are totally exposed (studs, plywood visible; tyvek wrap in front is not visible but is there), and I can see that no water is coming in from above...the leak is definitely from underneath.

The lower channels and corners meet the perimeter of the concrete slab and are caulked all the way around.

What can I do to prevent the persistent leaking at the two corners? I'm at a loss...

Thks,
bk

[grumpydasmurf]

Pics of the corners.

Typically corners should be treated with aluminum before the vinyl goes up. Inside corners where vinyl meets brick ( for example ) usually receive a healthy dose of some type of sealant (usually caulk ) before the siding goes on.

Always use pre-formed vinyl corners where possible instead of fabricating your own corners out of J Channel.

[JCA]

Well, I'm cetainly no expert on this. I think though that it won't be that big of a deal. You have tyvek so that means the water is simply running down the wall and out from under the corner onto the ground. In other words the tyvek is working and the water is running out and not just soaking into the framing. I did not flash all of my corners yet either, but plan to flash the corners that get the most rain before I install the siding on that wall. The problem may be the corner top, does it go all the way up or stop before the eave? Capping that corner with a piece of metal may help.

[GiantScale]

The siding must end at the top of the slab or higher, and the slab might be bigger than your bottom plate outside dimension maybe?

I would have made sure the sheathing, house wrap and siding extended lower than the top of the slab. Water cant go up unless wind driven.