The $2 Piece of Metal That Causes $60,000 of Stucco Damage

Of everything that goes wrong with stucco in this county, one omission does more damage per square inch than all the others combined — and you can check for it yourself from the driveway.

Go outside and look at your house. Find every place where the bottom edge of a roof runs into a wall that carries on upward — over a garage, beside a bump-out, at the side of a dormer, where a porch roof meets the main body of the house.

At the bottom end of each of those roof edges, where the roof meets the gutter, there should be a small piece of metal angled outward, kicking water away from the wall and into the gutter. That is a kickout flashing.

If it is not there, and there is staining on the wall below, you have almost certainly found where your water is coming from.

Why it does so much damage

The arithmetic is what makes this detail matter so much more than its size suggests.

A roof plane collects rain across its entire area. All of that water runs down the slope and concentrates at the bottom edge. With a kickout in place, it is diverted into the gutter and taken away. Without one, it runs straight off the end of the roof and into the joint between the roof and the wall — at one point, a few inches wide.

So instead of a wall receiving whatever rain falls on it, one specific square foot of wall receives the runoff from an entire roof plane, on every rainfall, for as long as the house stands. It is the difference between standing in the rain and standing under a downspout.

On a wall built without a drainage plane behind the cladding, that water goes into the OSB sheathing and stays there.

Why it is missing on so many houses

Partly sequencing. The kickout sits at the boundary between the roofer's work and the stucco applicator's, and on a fast-moving site in the boom years it was easy for each trade to assume the other had it. Partly appearance — some builders left it off because a homeowner thought it looked untidy, without knowing what it did. And partly because enforcement of the detail was inconsistent during exactly the period Central Bucks was being built out.

How to check yours

Walk the perimeter of the house and stop at every roof-to-wall intersection. For each one:

• Is there visible metal angled away from the wall at the bottom of the roof edge? If yes, good.
• Is the wall directly below darker, streaked, or stained compared with the wall either side of it? That is the signature.
• Is there organic growth concentrated in that one vertical strip?
• Inside the house, is there any damage on the wall behind that spot — soft drywall, lifting paint, a musty smell?

Binoculars help. So does looking during actual rain, when the water path is visible rather than inferred.

What it costs to fix

Retrofitting a kickout is not just screwing on a piece of metal — the flashing has to be lapped correctly into the water-resistive barrier behind the cladding, which means opening the wall locally and patching back. Retrofit work generally runs $1,000 to $4,500 in this area depending on the number of locations and access.

Set that against what the omission causes: sheathing and framing repair behind stucco runs $6,000 to $40,000, and a full remediation $45,000 to $140,000.

The catch

Installing the kickout now stops more water arriving. It does nothing about the water that has arrived over the past twenty years. If there is staining below a missing kickout, the honest sequence is to test what is behind the wall first, then fix the flashing and whatever the water has already destroyed at the same time — because the wall has to be opened either way.

Frequently asked

General information for Central Bucks County, PA homeowners — not a diagnosis, not a quote, and not an inspection. Every house is different, and only a registered contractor or inspector who tests your wall can tell you what yours needs.